 Feedback
|
Table Of Contents
AT Command Set and Register Summary for V.34, 56K, and V.90 12-Port Modules
Sn? (Read Configuration Register)
Wn (Connection Speed Reporting)
^V (Display Bootstrap Revision)
%An (Autoreliable Fallback Character)
%Gn (Independent Serial Port and Modem Port Speed)
%V (Display Modem Firmware Version)
&W (Store Current Configuration)
)Mn (Power Level Adjustment for Cellular Telephone Connections)
*W (Store Complete Configuration)
Changing Country Codes on Microcom Modems
-Mn (MNP Class Connect Messages)
-Qn (Fallback Modulation Speed)
-V (Split Modem Port Speed with Multiprotocol Autoanswer)
:Tn? (Read Configuration Register)
@Cn (CTR, DSR, and DCD Connect Message Control)
@E (Detailed Modem Call Status)
@Mn (Select Transmit Level for Cellular Connections)
@Un (Minimum Connection Speed)
\Dn (Serial Port DSR/CTS Control)
\F (Display Stored Phone Numbers)
\Pn{dial string} (Store a Telephone Number)
\ Qn (Serial Port Flow Control)
\Rn (Serial Port Ring Indicator)
\Vn (Error Correction Result Code Form)
#En (Answer Mode Escape Sequence)
Modem S and :T Register Summary
Point to a New Reference Register
Change the Value of a Register
Display the Value of the Reference Register
Change the Value of the Reference Register
S3 (Carriage Return Character)
S7 (Wait for Carrier After Dial)
S8 (Pause Time for Dial Delay)
S9 (Carrier Detect Response Time)
S10 (Delay for Hangup After Carrier Loss)
S12 (Escape Code Guard Time and Remote Access Attention Sequence Guard Time)
S16 (Bit-Mapped Register for Test Options)
S25 (Delay to DTR and Asynchronous/Synchronous Time Delay)
:T0 (Timer for V.22 bis, V.22, and V.32 Modes During Multi-Protocol Answer)
:T3 (Timer for V.21 and V.23 Answer Tone Duration)
:T4 (Timer for Line Turnaround Delay and Carrier On)
:T6 (Timer for DCD Turn On Delay)
:T9 (Primary XON Flow Control Character)
:T10 (Primary XOFF Flow Control Character)
:T11 (Secondary XON Flow Control Character)
:T12 (Secondary XOFF Flow Control Character)
:T14 (Connect Message Delay Timer)
:T16 (CTS Turn On Delay Timer)
:T17 (V.32/V.32 bis Connection Training Timer)
:T110 (Select V.8 or V.8 bis Modem Exchange Register)
:T114 (56KFlex Control Register)
:T120 (Answerback Tone Duration)
:T121 (Answerback Tone Configuration for PoS)
Example of Modemcap Creation, Assignment, Audit
V.90 56K AT Command Set Support
AT Command Set and Register Summary for V.34, 56K, and V.90 12-Port Modules
April 25, 2002
This document describes AT commands and S and :T registers for the following universal access server modules:
•
V.34 12-port module
–
–
•
–
•
–
See "V.90 56K AT Command Set Support," page 86 for specific information pertaining to the AT command set which supports the K56flex and V.90 speeds. These commands are in support of firmware version 5.x.xx (use the show modem version command).
Note
Note
Note
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120t/120t7/spe1206t.htmIf you have questions or need help, refer to the last section "Cisco Connection Online" for further information.
This document contains the following sections:
•
Entering AT Commands
Keep in mind the following guidelines when you send AT commands to a modem:
•
Table 1 AT Commands
Note
•
•
•
•
•
•
–
–
Note
Alphabetic Command Set
This section describes modem commands that begin with an alphabetic (A to Z) character.
A (Answer)
Forces the modem off-hook in answer mode, regardless of the value of register S. If result codes are enabled, the workstation displays RING (long form) or 2 (short form) when it receives a call.
A/ (Repeat Last Command)
Reexecutes the last command one time. A/ is not preceded by the AT prefix and is not followed by a Return.
AT (Attention)
Informs the modem that commands are being sent to it. AT must precede all other commands except A/ and +++.
Bn (ITU/Bell Mode)
Selects the ITI-U/Bell connection mode used when connecting at 300 and 1200 bps. Bn is ignored when the modem port is set to other speeds. Table 2 lists command options.
Table 2 ITI-U/Bell Mode Command Options
B0
ITU V.22 standard at 300 and 1200 bps, international default1
B1
Bell 212A standard at 300 and 1200 bps, USA default1
1 Default is determined by country setting.
D {dial string} (Dial)
Dials a telephone number to establish a connection. The Dial command must be the last command on the command line. The dial string can contain up to 98 characters; valid characters are the digits 0 to 9, the dial modifiers listed in Table 3, and # and * for tone dialing. The modem ignores invalid characters; dial strings longer than 98 characters return an error. For example, to dial the telephone number 1 617 555 1234, enter the following command:
D 16175551234To cancel the Dial command, press any key or set Data Terminal Ready (DTR) to off unless &D0 (DTR ignored) is set. After disconnect, there is a five-second delay before the modem is set off-hook in originate mode.
Dial Modifiers
The dial modifiers listed in Table 3 add conditions to the telephone number that you are dialing. You can use several dial modifiers with the same telephone number, and, unless otherwise noted, you can place dial modifiers anywhere in the dial string.
En (Command Echo)
Configures the modem to echo commands to the workstation. Table 4 lists command options.
Default
E1
Table 4 Command Echo Options
E0
Disables echoing commands to the workstation
E1
Enables echoing commands to the workstation
H (Hang Up)
Disconnects from the remote system and hangs up the telephone line. If the %Dn (Disconnect Buffer Delay) time is nonzero, the hangup can be delayed until the modem has transmitted all data in its transmit buffer.
In (Identification)
Displays modem information and results of checksum tests on firmware. Table 5 lists identification command options.
Table 5 Identification Command Options
On (Enter Connect State)
Sets the modem to connect state. Table 6 lists command options.
Table 6 Connect State Command Options
Qn (Quiet)
Configures the modem to send result and status codes, such as OK, BUSY, and RING, to your workstation. Table 7 lists command options.
Default
Q0
Sn? (Read Configuration Register)
Displays the contents of S register n (where n is a decimal number).
Range
0 to 27
Default
S0
T (Tone Dial)
Sets the current dialing mode to tone. This is the default dialing mode.
Vn (Result Code Form)
Selects the result code format sent to your workstation. The \Vn command (Error Correction Result Code Form) modifies the connect messages to reflect a reliable link connection. Table 8 lists command options.
Default
V1
Table 8 Result Code Form Command Options
Wn (Connection Speed Reporting)
Displays the serial port or modem port speed in connect messages. When the X0 command (Extended Result Codes) is set, CONNECT displays for any Wn command option. Table 9 lists command options.
Default
W2
Table 9 Connection Speed Reporting Command Options
W0
Displays serial port connect messages
W1
Displays serial port connect messages
W2
Displays modem port connect messages
Xn (Extended Result Codes)
Selects the extended result code format sent to the workstation. Table 10 lists command options.
The following commands also affect the result code format:
•
•
When the modem is set to ignore dial tone, it waits for the register S6 time delay and dials with or without a dial tone.
Default
X4
Note
Yn (Long Space Disconnect)
Configures the modem to send a four-second Break on receipt of an H command (Hang Up). The answering modem disconnects if it receives the Break. This command is used only in normal and direct connections. Table 11 lists command options.
The four-second Break is also sent if Y1 and one of the following &Dn commands (Data Terminal Ready Control) are set:
•
•
Default
Y0
Z (Reset)
Hangs up the telephone line, clears the modem and the serial port buffers, and restores any settings stored with the &W or *W commands. If no settings are stored, the command restores the factory default (&F) settings.
Caret Command Set
This section describes modem commands that begin with a caret (^) character.
^H (Host Port Upgrade)
Copies new firmware from a computer file to the modem's Flash memory.
^V (Display Bootstrap Revision)
Displays the modem's current Flash memory bootstrap revision.
Dollar Command Set
This section describes modem commands that begin with a dollar ($) character.
$Bn (Serial Port Bps Rate)
Sets the serial port rate to n bps.
Range
300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps
Default
$B115200
$D (Power-Up Diagnostics)
Runs power-up diagnostics.
Percent Command Set
This section describes modem commands that begin with a percent (%) character.
Note
%An (Autoreliable Fallback Character)
Specifies the ASCII character recognized as the autoreliable fallback character on the answering modem. In autoreliable mode, when the modem encounters an incoming autoreliable fallback character from the remote system, it automatically switches to normal mode and passes the character to the serial port. Autoreliable fallback character recognition stops if the modem receives a SYN character (decimal 22). The \N3 (Operating Mode) and \C2 (Autoreliable Buffer) commands must also be set.
Caution
Range
0 to 127 (ASCII decimal)
Default
%A0 (autoreliable fallback character is disabled)
%Bn (Modem Port Bps Rate)
Sets the modem port data rate. Downshifting can still occur.
Note
The %Bn command is affected by the following %Gn command (Independent Serial/Modem Port Speed) options:
•
•
Range
300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24000, 26400, 2800, 28800, 29333, 30666, 31200, 32000, 33333, 34000, 34666, 33600, 36000, 37333, 38000, 38666, 40000, 41333, 42000, 42666, 44000, 45333, 46000, 46666, 48000, 49333, 50000, 50666, 52000, 53333, 54000, 54666, 56000 bps
Note
Default
%B33600 for V.34 modems
%B56000 for 56 kbps modems%Cn (Compression Control)
Sets the modem to use a data compression method in reliable connections. The recommended default command setting of %C3 allows the modem to establish a reliable connection using V.42 bis compression or MNP Class 5 Data Compression, depending on the capability of the remote modem.
If the remote modem does not support data compression or has data compression disabled, the modem can establish a noncompression connection with any %Cn setting.
Throughput is affected by the \Jn command (Bps Rate Adjust) options:
•
•
Default
%C3
Table 12 Compression Control Command Options
%Dn (Disconnect Buffer Delay)
Specifies a delay time for the modem to process data in its transmit or receive buffers before disconnecting. When DTR transitions off or an H command (Hang Up) is entered, the modem attempts for n seconds to empty its transmit buffer before disconnecting. When carrier transitions off, the modem attempts for n seconds to empty its receive buffer before disconnecting. If the buffers are empty or if n = 0, the modem disconnects immediately.
If a physical disconnect occurs (for example, the connection is lost), only the receive buffer can be processed. If the delay expires before the modem empties its buffers, or if the modem is in command state at disconnect, data can be lost. The receive buffer may not empty before disconnecting if %E1 (Autoretrain) is set during normal mode connections at 2400 bps or higher.
Range
0 to 255 seconds
Default
%D0
%En (Autoretrain)
Sets the modem to resynchronize (autoretrain) up to three times (for a total of up to 6 seconds) before hanging up. The modem resynchronizes only for connection speeds of 2400 bps or higher. The %En command is ignored in V.32 communication. Table 13 lists command options.
Default
%E1
Table 13 Autoretrain Command Options
%Fn (V.23 Mode)
Configures the modem for V.23 mode. Table 14 lists the V.23 command options.
Default
%F0
Table 14 V.23 Command Options
%Gn (Independent Serial Port and Modem Port Speed)
Sets the modem port speed independent of the serial port speed. The modem port speed is set by the %Bn command (Modem Port Bps Rate). Table 15 lists command options.
Default
%G0
The following tables list command strings for setting modem port speeds:
•
•
•
Table 16 Modem Protocol Commands
Table 17 V.34 Commands
2400 bps
%B24001
4800 bps
%B4800
7200 bps
%B7200
9600 bps
%B9600
12000 bps
%B12000
14400 bps
%B14400
16800 bps
%B16800
19200 bps
%B19200
21600 bps
%B21600
24000 bps
%B24000
26400 bps
%B26400
28800 bps
%B28800
31200 bps
%B31200
33600 bps
%B33600
1 In answer mode, this will result in V.22 bis connection.
%Ln (Speed Matching)
Configures the modem to use speed matching when establishing a connection. Table 18 lists command options.
Default
%L1
Table 18 Speed Matching Command Options
%L0
Provides partial speed matching
%L1
Enables speed matching
%L2
Disables speed matching
%L3
Enables V.8 automode with fallback to ITU-T1 automode
%L4
Enables V.8 automode only
1 International Telecommunications Union Telecommunication Standardization sector.
Modem Connection Modes Using Speed Matching
The following tables list connections the modem can establish with %L1 or %L3 set.
•
•
•
•
Table 19 56K Modem Originates Call
V.90K56flex (32000-56000)
V.90 (28000-56000)-
V.22[a]
-
-
V.22 bis
V.32
V.32 bis
V.FC
V.34
K56flex1
V.34 annex 12- (31200-33600)
V.22[a]
-
-
V.22 bis
V.32
V.32 bis
V.FC
V.34
V.34
V.34 (2400-28800)
-
V.22[a]
-
V.22[a]
V.22 bis
V.32
V.32 bis
V.FC
V.34
V.34
V.FC (14400-28800)
-
V.22[a]
-
V.22[a]
V.22 bis
V.32
V.32 bis
V.FC
V.FC
V.FC2
V.32 bis (4800-14400)
-
V.22[a]
-
V.22[a]
V.22 bis
V.32
V.32 bis
V.32 bis
V.32 bis
V.32 bis
V.32 (4800-9600)
-
V.22[a]
-
V.22[a]
V.22 bis
V.32
V.32
V.32
V.32
V.32
V.22 bis (2400)
-
V.22[a]
-
V.22[a]
V.22 bis
V.22 bis
V.22 bis
V.22 bis
V.22 bis
V.22 bis
V.22[a] (1200)
-
V.22[a]
-
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[b] (600)
-
-
V.22[b]
-
-
-
-
-
-
-
V.23[a] (xmt 75)
-
-
-
V.23[b]
V.23[b]
V.23[b]
V.23[b]
V.23[b]
V.23[b]
V.23[b]
V.23[b] (xmt 1200)
-
-
-
-
-
-
-
-
-
-
V.21(75-300)
-
V.22[a]
-
V.21
V.21
V.21
V.21
V.21
V.21
V.21
Bell 212A (1200)
Bell 212A
Bell 212A
-
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
Bell 103 (300)
Bell 103
Bell 103
-
Bell 103
Bell 103
Bell 103
Bell 103
Bell 103
Bell 103
Bell 103
1 The originating K56flex modem will connect in K56flex modulation only if the answering modem is a K56flex client. Otherwise, the originating K56flex modem will connect in V.34 modulation if the answering modem is another K56flex server.
2 If V.FC modulation is supported in client modems. If not, expected modulation is V.32 bis.
Table 20
56K Modem Answers Call
Table 21
V.90V.34 annex 12 (31200-33600)
V.22 bis
V.32
V.32 bis
V.FC
V.34
V.34
V. 34 (2400-28800)
V.22[a]
V.22 bis
V.32
V.32 bis
V.FC
V.34
V.34
V.FC (14400-28800)
-
V.22[a]
-
V.22[a]
V.22 bis
V.32
V.32 bis
V.FC
V.FC
V.FC1
V.32 bis (4800-14400)
-
V.22[a]
-
V.22[a]
V.22 bis
V.32
V.32 bis
V.32 bis
V.32 bis
V.32 bis
V.32 (4800-9600)
-
V.22[a]
-
V.22[a]
V.22 bis
V.32
V.32
V.32
V.32
V.32
V.22 bis (2400)
-
V.22[a]
-
V.22[a]
V.22 bis
V.22 bis
V.22 bis
V.22 bis
V.22 bis
V.22 bis
V.22[a] (1200)
-
V.22[a]
-
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[b] (600)
-
-
V.22[b]
-
-
-
-
-
-
-
V.23[a] (xmt 75)
-
-
-
V.23[b]
V.23[b]
V.23[b]
V.23[b]
V.23[b]
V.23[b]
V.23[b]
V.23[b] (xmt 1200)
-
-
-
-
-
-
-
-
-
-
V.21(75-300)
-
V.22[a]
-
V.21
V.21
V.21
V.21
V.21
V.21
V.21
Bell 212A (1200)
Bell 212A
Bell 212A
-
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
V.22[a]
Bell 103 (300)
Bell 103
Bell 103
-
Bell 103
Bell 103
Bell 103
Bell 103
Bell 103
Bell 103
Bell 103
1 If V.FC modulation is supported in client modems. If not, expected modulation is V.32 bis.
V.34 Modem Originates Call
Table 22 V.34 Modem Answers Call
Restricted Speed Matching
Use the %L0 or %L2 command options on both originating and answering modems to restrict the connection speed. Table 23 lists connection speeds using the %L0 partial speed matching option. Table 23 lists connections speeds using the %L2 speed matching disabled option. If %L2 is set, the modem speed matches the closest possible connection speed.
Table 24 %L2 Connection Speeds
%M (Modulation)
This command is used to set the upper modulation used in connections. Setting %M results in %B getting set to the maximum baud rate for that modulation.
Example: With AT%G0, setting %M will have no effect on %B.With AT%G1, setting %M will cause the %B to be set tot he maximum value in that modulation.%Mn (Modulation Selection)
This command is used to set the upper modulation used in connections. Table 25 lists command options.
Default
%M2 for V.34 modules
%M3 for 56 kbps modules (version 3.x.xx)
%M4 for V.90 56 kbps modules (version 5.x.xx)
Note
Table 25 Modulation Selection Command Options
%M0
Disables, V.34, and K56flex modulations
V.32 bis, 14.4 kbps maximum
%M11
Disables V.34 and K56flex modulations
V.FC, 28.8 kbps maximum
%M2
Disables K56flex modulation
V.34, 33.6 kbps maximum
%M3
Enables all modulation modes, including K56flex
K56flex, 56 kbps maximum
%M4
Enables all modulation modes, including V.90
V.90, 56 kbps maximum
1 %M1 is not supported for 56K modems.
%Rn (Read All Registers)
Displays the contents of modem S and :T registers as a table of values in decimal and hexadecimal format. Table 26 lists command options.
The following display provides an example of the %R command:
at%r0REG DEC HEX REG DEC HEXS00 001 01H S14 138 8AHS01 000 00H S15 000 00HS02 043 2BH S16 000 00HS03 013 0DH S17 000 00HS04 010 0AH S18 000 00HS05 008 08H S19 000 00HS06 002 02H S20 000 00HS07 060 3CH S21 048 30HS08 002 02H S22 118 76HS09 006 06H S23 030 1EHS10 060 3CH S24 000 00HS11 075 4BH S25 005 05HS12 050 32H S26 001 01HS13 000 00H S27 064 40HS13 000 00H S27 064 40HOK%Un (Clear Serial Port Speed)
Sets the serial port speed. Table 27 lists command options.
Default
%U1
Table 27 Clear Serial Port Speed Options
%V (Display Modem Firmware Version)
Displays the modem firmware version and country code. Table 28 lists command options. (For country code listings, see Table 38.)
Default
%V1
Table 28 %V Display Modem Firmware Version
Ampersand Command Set
This section describes modem commands that begin with an ampersand (&) character.
&Cn (Serial Port DCD Control)
Controls the Data Carrier Detect (DCD) signal level. Use this command if your workstation requires DCD to be off at certain times. Table 29 lists command options. See also the \Dn command.
Default
&C1
&Dn (DTR Control)
Specifies the modem action when Data Terminal Ready (DTR) transitions off. The on-to-off transition of DTR must last as long as the value specified in register S25. Positive transitions of DTR (off-to-on) within five seconds after disconnect are ignored. Table 30 lists command options.
Default
&D3
&F (Restore Command Defaults)
Restores the factory default configuration. Stored telephone numbers are not cleared.
&Gn (Guard Tone)
Sets the guard tone frequency on the answering mode. Table 31 lists command options.
Default
&G0
Table 31 Guard Tone Command Options
&G0
Disables the guard tone
&G1
Sets the guard tone on the answering modem to 550 Hz
&G2
Sets the guard tone on the answering modem to 1800 Hz
&Pn (Dial Pulse Ratio)
Sets the ratio of off-hook (make) to on-hook (break) time that the modem uses for pulse dialing. Table 32 lists command options.
Default
&P0
Table 32 Dial Pulse Ratio Command Options
&Sn (DSR Options)
Sets the serial port Data Set Ready (DSR) signal. Table 33 lists command options.
Default
&S0
&Tn (Diagnostic Test Mode)
Configures the modem to run a local or remote diagnostic test. Use the &T0 command to stop a running diagnostic test.Table 33 lists command options.
Default
&T5
&W (Store Current Configuration)
Stores the current configuration. The &W command stores the active commands and S registers, except restricted S registers S2 to S12, and the serial port speed and parity and modem port speed in effect when you enter the command. Telephone numbers are stored independently with the \Pn and &Zn commands.
Note
Note
Parenthesis Command Set
This section describes modem commands that begin with a right-parenthesis ()) character.
)Mn (Power Level Adjustment for Cellular Telephone Connections)
Adjusts power levels during link negotiation for reliable connections to accommodate signaling requirements of cellular telephone equipment. Table 34 lists command options.
Default
)M0
Asterisk Command Set
This section describes modem commands that begin with an asterisk (*) character.
*I (Modem Identifier)
When the *I command is entered, the following prompt appears:
ID:The identifier can consist of up to 25 ASCII characters. It is truncated after the 25th character. The modem identifier is also displayed by the \S command (Read Online Status).
Default
No default identifier.
*W (Store Complete Configuration)
Stores the complete modem configuration. The *W command stores the active commands and S registers, including the current values of restricted S registers S2 to S12 (which are not stored with &W), and the serial port speed and parity and modem port speed in effect when you enter the command. Telephone numbers are stored independently with the \Pn and &Zn commands.
Note
Note
Hyphen Command Set
This section describes modem commands that begin with a hyphen (-) character.
-D{dial string} (Repeat Dial)
Redials a telephone number, up to nine times, until a connection is made. In reliable mode, the modem does not redial the number if the remote modem answers but fails to establish a reliable connection. Table 36 lists command options.
The dial string contains up to 98 characters. Valid dial string characters are 0-9, the dial modifiers listed in Table 3, and the # and * characters for tone dial. The modem ignores invalid characters.
-En (Modem Port Data Length)
Specifies the number of data bits used on the modem port during normal mode connections when the \N0 command (Operating Mode) is set, and the serial port is configured for asynchronous transmission of 11-bit characters. Both modems must be set to the same number of data bits. Table 37 lists command options.
The modems cannot pass data when a \N3 or \N5 reliable connection is set and falls back to a normal connection with 11-bit data characters enabled on both modems.
Default
-E0
Table 37 Modem Port Data Length Command Options
-E0
Enables 10-bit data during normal mode connections
-E1
Enables 11-bit data during normal mode connections
-Hn (Dumb Mode)
Configures the modem to smart mode (recognize commands on the Data Terminal Equipment [DTE] port and send result codes) or dumb mode (ignore commands on the DTE port and do not send result codes). Table 38 lists command options.
Default
-H0
Table 38 Dumb Mode Command Options
-In (Country Code)
Sets the country code for the modem. The code does not take effect until the modem has been reset by the Z (Reset) command or a power cycle. Table 38 lists country codes.
Country codes that are set manually (that is, not following the procedure described in the next section, will remain in effect until one of the following events occur:
•
•
•
•
Note
Changing Country Codes on Microcom Modems
This section describes how to change the country code on Microcom modems in Cisco universal access servers. The default country code is USA. The USA country code is also used for the following countries: Argentina, Brazil, Canada, Chile, China, Columbia, Hong Kong, India, Indonesia, Korea, Malaysia, Mexico, Peru, Philippines, Singapore, Taiwan, and Thailand. If you are using the modems in a different country, you must change the country code.
Configure
Follow these steps:
Step 1
Router> enableRouter# config termEnter configuration commands, one per line. End with CNTL/Z.Router(config)#Step 2
Router(config)# modemcap edit micro_czech miscellaneous -I18Z
Table 39 Country Codes
Australia
20
49
Austria
22
92
Belgium1
23
67
Czech/Slovak Republic1
18
91
Denmark
10
63
Finland
9
71
France1
25
32
Germany
17
68
Israel
15
16
Italy
3
21
Ireland
24
97
Japan
13
14
Netherlands
5
04
New Zealand
11
55
Norway
8
72
Poland
19
93
Portugal
27
94
Spain
6
76
South Africa
16
69
Sweden
7
09
Switzerland1
14
66
UK2
2
12
USA3
1
85
1 The s-register is set to s0=2 (that is, answer on the second ring) by default. Additional configuration is required.
2 The UK country code is also used for Greece, Hungary, and Saudi Arabia.
3 The USA country code also applies to Argentina, Brazil, Canada, Chile, China, Columbia, Hong Kong, India, Indonesia, Korea, Malaysia, Mexico, Peru, Philippines, Singapore, Taiwan, and Thailand.
Step 3
•
Router(config)# no modem fast-answerRouter(config)# modemcap edit micro_czech autoanswer s0=2•
Router(config)# modemcap edit micro_czech miscellaneous :T26=8-I18ZRouter(config)# exitRouter#
Note
Step 4
Router# config termRouter(config)# line 1 48Router(config-line)# modem autoconfigure type micro_czechSome messages display while the modems are reconfigured using the new modemcap. When the last message appears, press Return:
...3w5d: TTY48: Done with modem configurationStep 5
Router(config-line)# Ctrl-ZRouter# copy running-config startup-config[OK]Verify
Verify the configuration changes using one of the following methods.
The following example shows verification from the router command prompt:
Router# show modemcap mcom_czechModemcap values for mcom_czechFactory Defaults (FD): [not set]Autoanswer (AA): [not set]Carrier detect (CD): [not set]Drop with DTR (DTR): [not set]Hardware Flowcontrol (HFL): [not set]Lock DTE speed (SPD): [not set]DTE locking speed (DTE): [not set]Best Error Control (BER): [not set]Best Compression (BCP): [not set]No Error Control (NER): [not set]No Compression (NCP): [not set]No Echo (NEC): [not set]No Result Codes (NRS): [not set]Software Flowcontrol (SFL): [not set]Caller ID (CID): [not set]On-hook (ONH): [not set]Off-hook (OFH): [not set]Miscellaneous (MSC): -i18zTemplate entry (TPL): [not set]Router#
Note
The following example shows verification using debug:
Step 1
Router# debug confmodemModem Configuration Database debugging is onRouter# debug modemModem control/process activation debugging is onRouter#Step 2
Router# clear line 1[Confirm]OKDTR drops and modem autoconfigure runs when the modem is reset. It may take a minute while the messages display:
Router#*Mar 3 23:20:26.114: TTY1: Line reset*Mar 3 23:20:26.118: TTY1: Modem: IDLE->HANGUP*Mar 3 23:20:26.534: TTY1: dropping DTR, hanging up*Mar 3 23:20:26.534: tty1: Modem: HANGUP->IDLE*Mar 3 23:20:31.838: TTY1: restoring DTR*Mar 3 23:20:32.958: TTY1: Modem command: --AT&F&C1&D2:T26=8-I18Z \ Q3\N5-K0\J0%C3$B115200S0=2H0--*Mar 3 23:20:34.234: TTY1: Modem configuration succeeded*Mar 3 23:20:36.090: TTY1: locking speed (115200) response ---OK---*Mar 3 23:20:36.090: TTY1: locked DTE speed at 115200*Mar 3 23:20:36.094: TTY1: Done with modem configurationStep 3
Router#modem at-mode 0/0You are now entering AT command mode on modem (slot 0 / port 0).Please type CTRL-C to exit AT command mode.at%v1MNP Class 10 V.34/V.FC Modem Rev 3.1.30/91OKThe example shows Rev 2.1.9/91. Locate "91" in the "Country Code Displayed in Banner" column of Table 2. Notice that "91" is for the Czech/Slovak Republic.
Step 4
This concludes the procedure for changing the country code.
-Jn (Detect Phase)
Configures the originating modem to send a control sequence to the answering modem to determine the type of error correction enabled, either LAPM, MNP, or none. See the \Nn command (Operating Mode) for information about the types of connections that can be established. Table 40 lists command options.
Default
-J1
Table 40 Detect Phase Command Options
-Kn (MNP Extended Services)
Configures the modem to use MNP extended services that are not available when operating in LAPM mode. For example, two modems with MNP extended services enabled negotiate MNP Class 10 with V.42 bis compression instead of LAPM. Table 41 lists command options.
Default
-K1
-Mn (MNP Class Connect Messages)
Determines whether MNP class connect messages are displayed. Table 42 lists command options.
The -M1 setting overrides the \V command (Error Correction Result Code Form) for long-form connection result codes and the Wn command (Connection Speed Reporting) for serial-port connect messages. The following commands override the -Mn command:
•
•
Default
-M0
-On (Serial Port Parity)
Changes the serial port parity set by the AT sequence. Use this command when the local device supports XON/XOFF flow control and detects parity to ensure that all modem-generated XON and XOFF characters have the correct parity. Table 43 lists command options.
You can also use the -On command to change the serial port parity while connected to a remote device. Modem port parity cannot be changed after a connection is established. When the parity required for a connection is not the parity set by the sequence, you must set the correct parity when you enter the Dial command, as part of the same command line.
The AT sequence cannot be used to match space parity; no parity is set instead. You must enter -O3 to set space parity.
Default
-O4
Table 43 Serial Port Parity Command Options
-Pn (Check Parity)
Controls parity checking of XON and XOFF characters, the escape code sequence, and HP ACK characters. In command state, all command echoes and command responses from the modem are sent to the workstation with parity that matches the serial port parity. Table 44 lists command options.
Default
-P0
-Qn (Fallback Modulation Speed)
Configures the modem to fall back from a V.32 bis or V.32 MNP reliable connection at 14400, 9600, 7200, or 4800 bps to a V.22 bis MNP reliable connection at 2400 bps or a V.22 MNP reliable connection at 1200 bps. Fallback can occur when poor telephone lines cause excessive MNP retransmissions. Table 45 lists command options.
Fallback from a V.32 bis or V.32 MNP reliable connection to V.32 bis or V.32 at 4800 bps is always enabled for any -Qn command option. The modem always uses the V.22 standard when it falls back from a V.32 MNP reliable connection to a 1200 bps MNP reliable connection for any Bn setting (ITI-U/Bell mode).
Default
-Q2
Table 45 Modulation Speed Command Options
-V (Split Modem Port Speed with Multiprotocol Autoanswer)
Determines whether the modem port uses split transmit and receive speed operation when using the multiprotocol autoanswer feature. %F0 must also be set. Note that V.23 is the split speed on the modem link (that is, 75/1200 bps). Table 46 lists split serial port speed command options.
Default
-V1 for U.S.
-V0 for international
Colon Command Set
This section describes modem commands that begin with a colon (:) character.
:Dn (Manual Dial)
Sets the modem off-hook in originate mode when DTR is raised. Table 47 lists command options.
Default
:D0
Table 47 Manual Dial Command Options
:En (Compromise Equalizer)
Configures the modem to use the compromise equalizer when it connects in V.32 mode. Table 48 lists command options.
Default
:E1
:Tn? (Read Configuration Register)
Displays the contents of :T register n (where n is a decimal number).
@Character Command Set
This section describes modem commands that begin with an at (@) character.
@Cn (CTR, DSR, and DCD Connect Message Control)
Sets DSR, Clear To Send (CTS), and DCD on before or after a connect message. Used with the :T14 (Connect Message Delay Timer) register. Table 49 lists command options.
Default
@C0
Table 49 Connect Message Control Command Options
@C0
Sets CTS, DSR, and DCD on before the connect message is sent
@C1
Sets CTS, DSR, and DCD on after the connect message is sent
@E (Detailed Modem Call Status)
This is an unofficially supported modem status and debugging command that can be used by an experienced user to verify the detailed status of the modem during or after a call. The content of this command may change as required to assist in problem resolution. Therefore, the command may produce results that differ from the description in this document. For more information, see the section "Debugging," on page 78.
@Mn (Select Transmit Level for Cellular Connections)
Selects the initial transmit level for the connection. You can set levels from -10 to -35 decibels referred to 1 milliwatt (dBm). From @M10 to @M35, the level is the as -n dBm. Table 50 lists selected transmit level command options.
Default
@M0
Table 50 Selected Transmit Level Command Options
@Un (Minimum Connection Speed)
The AT@U command sets the minimum connection speed for both Rx and Tx speeds. Use the AT@U command to execute the following connections:
•
•
Backslash Command Set
This section describes modem commands that begin with a backslash (\) character.
\An (Maximum MNP Block Size)
Sets the maximum block size for MNP stream link connections. Table 51 lists command options.
Default
\A3
Table 51 MNP Block Size Command Options
\Bn (Transmit Break)
Sends Break to the remote system for 100n milliseconds. In a reliable link, Break is always sent for 300 milliseconds. Use the O command (Enter Connect State) to return to connect state. See also the \K command (Break Control).
Range
1 to 9 (100-millisecond increments)
Default
\B3 (300 milliseconds)
\Cn (Autoreliable Buffer)
Configures the modem to buffer data in autoreliable, autoanswer mode. The answering modem's data buffer can be used to store data during the 3-second link negotiation for a reliable connection. Table 52 lists command options.
For example, you can use %A to set the autoreliable fallback character to ASCII 13 (carriage return). Then set \C2 and \N3 (autoreliable mode). Non-MNP callers who connect and press Return to log on do not need to wait for the 3-second autoreliable window to expire before data can pass. See the \Nn command (Operating Mode) for more information about autoreliable and normal modes.
The \Jn command (Bps Rate Adjust) affects the type of connection established. Reliable and direct connections can result when bps rate adjust is enabled (\J1). Reliable and normal connections may result when bps rate adjust is disabled (\J0).
Default
\C0
Note
\Dn (Serial Port DSR/CTS Control)
Controls the DSR and CTS signals on the serial port. Use this command when the central site computer requires DSR and CTS to be off at certain times. Table 53 lists command options.
Selecting hardware flow control for the serial port overrides the \Dn command. When hardware flow control is selected, the CTS line indicates the ability of the modem to receive data from your workstation, and the DSR action does not change.
Default
\D0
Table 53 Serial Port DSR/CTS Control Command Options
Serial Port Signal Options
Use the &Cn and \Dn commands to control the serial port DCD, DSR, and CTS signal levels when your workstation requires DCD, DSR, and CTS to be off at certain times. Table 54 lists command options and signal level results.
\En (Data Echo)
Configures the modem to echo characters sent from the local workstation in connect state. Table 55 lists command options.
Default
\E0
\F (Display Stored Phone Numbers)
Displays the telephone numbers currently stored in the telephone directory.
\Gn (Modem Port Flow Control)
Sets the flow control method used to pace data between modems during a normal mode connection. Table 56 lists command options.
A reliable link has its own method of flow control and ignores the \Gn setting. The \ Qn command (Serial Port Flow Control) settings determine DTE port flow control during a reliable link.
Default
\G0
\Jn (Bps Rate Adjust)
Automatically adjusts the speed of the serial port to match the speed of the connection. Table 57 lists command options.
When a reliable connection is established at a speed between 4800 and 14400 bps and the bps rate adjust option is enabled, the serial port speed always adjusts to 9600 bps. If the connection is established at 14400 bps or higher, the serial port speed is adjusted to 19200 bps. If you set the serial port to the modem's highest rate of 115200 bps, turn off bps rate adjust so the serial port stays at 115200 bps.
Default
\J0
Note
\Kn (Break Control)
Determines the type of Break the modem transmits when it receives a Break. Table 58 describes the effect of n. The modem can buffer up to four Breaks on both the modem port and the serial port.
Default
\K5
Note
Table 58 \Kn Break Control
\K0
Enter command state; no Break to the remote system1
Empty data buffers; send a Break to the remote system
Send a Break to the remote system; set the modem to command state
Empty data buffers; send a Break to the serial port
\K1
Empty data buffers; send a Break to the remote system
Same as \K0
Send a Break to the remote system
Same as \K0
\K2
Same as \K0
Immediately send a Break to the remote system
Same as \K0
Immediately send a Break to the serial port
\K3
Immediately send a Break to the remote system
Same as \K2
Same as \K1
Same as \K2
\K4
Same as \K0
Send a Break to the remote system in sequence with any transmit data being buffered
Same as \K0
Send a Break to the serial port in sequence with the receive data being buffered
\K5
Send a Break to the remote system in sequence with transmit data
Same as \K4
Same as \K1
Same as \K4
1 Forces the modem to command state. To transmit a Break and enter connect state, enter the \B0 command. See the \B command description for details.)
\Nn (Operating Mode)
Selects the modem operating mode. Table 59 lists command options.
Default
\N3
Note
Table 60 lists connections that can be established, depending on the operating mode enabled on each modem. When more than one operating mode is listed within a column, the first mode is for the originating modem and the second is for the answering modem. NC indicates no connection.
Note
Table 60 Possible Connections for Operating Mode Command Options
Modem\N0
\N1
\N2
\N3
\N4
\N5
\N6
\N0
Normal
Direct/normal
NC
Normal
NC
Normal
NC
\N1
Normal/direct
Direct
NC
Normal/direct
NC
Normal/direct
NC
\N2
NC
NC
MNP
MNP
NC
NC
MNP
\N3
Normal
Direct/normal
MNP
MNP
LAPM
LAPM
LAPM
\N4
NC
NC
NC
LAPM
LAPM
LAPM
LAPM
\N5
Normal
Direct/normal
NC
LAPM1
LAPM
LAPM
LAPM
\N6
NC
NC
MNP
MNP
LAPM
LAPM
LAPM
1 For the modem to establish a LAPM connection, -K0 must be set.
\Pn{dial string} (Store a Telephone Number)
Stores entry n in the modem's telephone directory, where n is an integer (1 to 9) and dial string is a string of up to 98 characters. Valid dial string characters are 0 to 9, dial modifiers, and # and * for tone dialing. The modem ignores invalid characters. Dial strings longer than 98 characters return error messages. Phone numbers are not saved during a power reset.
\ Qn (Serial Port Flow Control)
Selects the flow control method used in the serial port. In direct mode connections, the modem ignores the \ Qn command. Table 61 lists command options.
Default
\ Q3
\Rn (Serial Port Ring Indicator)
Controls the Ring Indicator (RI) signal. RI follows the incoming ring signal on the telephone line. Table 62 lists command options.
Default
\R1
\Sn (Read Online Status)
Displays a list of modem commands and their current settings, the active connection type, the elapsed connect time, and the telephone number most recently dialed. The \S0 command outputs a single-screen display (press any key for the next screen). The \S1 command outputs a continuous screen display. Press Ctrl-X or Break to cancel the display.
Note
The following display is an example of \S1 command output with factory default settings for a V.34 modem:
at\s1IDLE 000:02:01LAST DIAL t1714756,0947NET ADDR: FFFFFFFFFFFFMODEM HW: OEM 2W United States4 RTS 5 CTS 6 DSR - CD 20 DTR - RIMODULATION IDLEMODEM BPS 33600 AT%G0MODEM FLOW OFF AT\G0MODEM MODE AUT AT\N3V.23 OPR. OFF AT%F0AUTO ANS. ON ATS0=1SERIAL BPS 115200 AT%U1BPS ADJUST OFF AT\J0SPT BPS ADJ. 0 AT\W0ANSWER MESSGS OFF ATQ2SERIAL FLOW BHW AT\Q3PASS XON/XOFF OFF AT\X0PARITY 8N ATBREAK 5 AT\K5EXIT CHAR 043 ATS2=43ANS DUMB MODE ON AT#E1CMD ECHO ON ATE1RESULTS OFF ATQ2RESULT TYPE MNPX ATV1\V2CONNECT MSG MDM ATW2CONN MNP- 0 AT-M0SPEED MATCH 1 AT%L1EQUALIZER 1 AT:E1FALLBACK 2 AT-Q2DATA ECHO OFF AT\E0INACT TIMER 00 AT\T0AUTO RETRAIN ON AT%E1COMPRESSION ALL AT%C3MAX BLK SIZE 256 AT\A3AUTO BUFF 0 AT\C0AUTO CHAR 000 AT%A0EMULATING HP OFF AT\H0PAUSE TIME 002 ATS8=2DTR 3 AT&D3MABP ADDRESS 001 AT^P1CARR DET 1 AT&C1DSR 0 AT\D0RING IND 1 AT\R1SPKR CTRL 1 ATM1SPKR VOL 2 ATL2LNG SPC DISC OFF ATY0DISC DELAY 000 AT%D0RDLB ENABLE OFF AT&T5DIAL MODE 4 ATX4PULSE DIAL 60% AT&P0PULSE MODE N AT%W0V23 HD EQU ON AT%O1GUARD TONE 0 AT&G0DATA CALL TONE OFF AT-C02ND FC OFF AT-F0NM BIT VALUE 0 AT-E0PAR CHK 0 AT-P0MANUAL DIAL 0 AT:D0UPSHIFT BPS OFF AT*H0CELLULAR OFF AT)M0LINETYPE 000 AT@M0DETECT PHASE ON AT-J1MNP EXT SVC 1 AT-K1UNIV V.23 1 AT-V1CONNECT MSG 1ST AT@C0DUMB MODE OFF AT-H0BELL ON ATB1CALL ABT DISAB OFF AT-Y0REVERSE ANS OFF AT-W0MIN CONN SPD 300 AT@UOKThe following display is an example of \S1 command output with factory default settings for a 56K modem:
at\s1IDLE 000:00:00LAST DIALNET ADDR: FFFFFFFFFFFFMODEM HW: OEM 2W United States4 RTS 5 CTS 6 DSR - CD 20 DTR - RIMODULATION IDLEMODEM T/R BPS ***** *****MODEM BPS 56000 AT%G0MODEM FLOW OFF AT\G0MODEM MODE AUT AT\N3BASE MODE K56 AT%M3V.23 OPR. OFF AT%F0AUTO ANS. ON ATS0=1SERIAL BPS 115200 AT%U1BPS ADJUST OFF AT\J0SPT BPS ADJ. 0 AT\W0ANSWER MESSGS ON ATQ0SERIAL FLOW BHW AT\Q3PASS XON/XOFF OFF AT\X0PARITY 8N ATBREAK 5 AT\K5EXIT CHAR 043 ATS2=43ANS DUMB MODE ON AT#E1CMD ECHO ON ATE1RESULTS ON ATQ0RESULT TYPE MNPX ATV1\V2CONNECT MSG MDM ATW2CONN MNP- 0 AT-M0SPEED MATCH 1 AT%L1EQUALIZER 1 AT:E1FALLBACK 2 AT-Q2DATA ECHO OFF AT\E0INACT TIMER 00 AT\T0AUTO RETRAIN ON AT%E1COMPRESSION ALL AT%C3MAX BLK SIZE 256 AT\A3AUTO BUFF 0 AT\C0AUTO CHAR 000 AT%A0EMULATING HP OFF AT\H0PAUSE TIME 002 ATS8=2DTR 2 AT&D2MABP ADDRESS 003 AT^P3CARR DET 1 AT&C1DSR 0 AT\D0RING IND 1 AT\R1SPKR CTRL 1 ATM1SPKR VOL 2 ATL2LNG SPC DISC OFF ATY0DISC DELAY 000 AT%D0RDLB ENABLE OFF AT&T5DIAL MODE 4 ATX4PULSE DIAL 60% AT&P0PULSE MODE N AT%W0V23 HD EQU ON AT%O1GUARD TONE 0 AT&G0DATA CALL TONE OFF AT-C02ND FC OFF AT-F0NM BIT VALUE 0 AT-E0PAR CHK 0 AT-P0MANUAL DIAL 0 AT:D0UPSHIFT BPS OFF AT*H0CELLULAR OFF AT)M0LINETYPE 000 AT@M0DETECT PHASE ON AT-J1MNP EXT SVC 1 AT-K1UNIV V.23 1 AT-V1CONNECT MSG 1ST AT@C0DUMB MODE OFF AT-H0BELL ON ATB1CALL ABT DISAB OFF AT-Y0REVERSE ANS OFF AT-W0MIN CONN SPD 300 AT@UOK
Note
\Tn (Inactivity Timer)
Specifies the time, in minutes, that the modem waits before hanging up when data is not sent or received. The inactivity timer is available only during normal and reliable link connections. \T0 disables the timer.
Range
0 to 90 minutes
Default
\T0 (disabled)
\Vn (Error Correction Result Code Form)
Sets the result code format to display a reliable link connection. The speed field content is determined by the Wn command (Connection Speed Reporting) setting. Setting -M1 (MNP Class Connect Messages) changes the format of the long form connection result codes. Table 63 lists command options.
Set V0\V3 if your software requires Hayes-compatible connection result codes. When V1 is set to select long form result codes, \V3 is equivalent to \V2.
Default
\V2
Connection Result Code Tables
The Cisco AS5300 access server module can also display these result codes when it attempts to establish connection. The tables use the abbreviations: rel (reliable) and non-rel (non reliable).
The following tables (Table 64 through Table 67) show the short and long form result codes, excluding connection result codes whose form depends on the \V, W, and -M commands.
•
•
•
•
•
Table 64 Result Codes
0
OK
1
CONNECT
2
RING
3
NO CARRIER
4
ERROR
6 1
NO DIALTONE
1 display of these call progress monitoring result codes depends on the setting of the X command.
Table 65 Result Codes
Report DTE speed75
75
75 /REL
300
300
300 /REL
600
600
300 /REL
1200
1200
1200 /REL
2400
2400
2400 /REL
4800
4800
4800 /REL
9600
9600
9600 /REL
19,200
19200
19200 /REL
38,400
38400
38400 /REL
57,600
57600
57600 /REL
115,200
115200
115200 /REL
230,400
230400
230400 /REL
1 If \V2 or \V4 are set and a reliable link is established, the message displays as one of the following formats:
CONNECT <speed>/REL - MNP or
CONNECT <speed>/REL - LAPM or
CONNECT <speed>/REL - CELLULAR or
CONNECT <speed>/REL- CELLULAR EC or
CONNECT <speed> /LAPM - CELLULAR EC2 In non-reliable V.21 or Bell 103 connections, the message displays as CONNECT.
Table 66 Result Codes
Modulation
Speed
non-rel
\V0 relV.21
300
V.21/REL
V.21/REL
Bell 103
300
--- 3
103/REL
103/REL
V.23 half-duplex
1200
V.23 HDX4
---
---
V.23 split speed
75/1200
V.234
---
---
V.22
6004
600
600/REL
600/REL
V.22 \Bell 212A
1200
1200
1200/REL
1200/REL
V.34/V.22bis
2400
2400
2400/REL
2400/REL
V.34/V.32
4800
4800
9600/REL
4800/REL
V.34/V.32bis
7200
7200
9600/REL
7200/REL
V.34/V.32
9600
9600
9600/REL
9600/REL
V.34/V.32bis
12000
12000
9600/REL
12000/REL
V.34/V.FC/V.32bis
14400
14400
14400/REL
14400/REL
V.34/V.FC
16800
16800
16800/REL
16800/REL
V.34/V.FC
19200
19200
19200/REL
19200/REL
V.34/V.FC
21600
21600
21600/REL
21600/REL
V.34/V.FC
24000
24000
24000/REL
24000/REL
V.34/V.FC
26400
26400
26400/REL
26400/REL
V.34/V.FC
28800
28800
28800/REL
28800/REL
V.34
31200
31200
31200/REL
31200/REL
V.34
33600
33600
33600/REL
33600/REL
K56flex
32000
32000
32000/REL
32000/REL
K56flex
34000
34000
34000/REL
34000/REL
K56flex
36000
36000
36000/REL
36000/REL
K56flex
38000
38000
38000/REL
38000/REL
K56flex
40000
40000
40000/REL
40000/REL
K56flex
42000
42000
42000/REL
42000/REL
K56flex
44000
44000
44000/REL
44000/REL
K56flex
46000
46000
46000/REL
46000/REL
K56flex
48000
48000
48000/REL
48000/REL
K56flex
50000
50000
50000/REL
50000/REL
K56flex
52000
52000
52000/REL
52000/REL
K56flex
54000
54000
54000/REL
54000/REL
K56flex
56000
56000
56000/REL
56000/REL
1 If \V2 or \V4 are set and a reliable link is established, the message displays as one of the following formats:
CONNECT <speed>/REL - MNP or
CONNECT <speed>/REL - LAPM or
CONNECT <speed>/REL - CELLULAR or
CONNECT <speed>/REL- CELLULAR EC or
CONNECT <speed> /LAPM - CELLULAR EC2 If \V5 is set, the message displays in one of the following formats:
CONNECT <DCE speed>/<modulation>/REL-CELLULAR
CONNECT <DCE speed>/<modulation>/REL-LAPM
CONNECT <DCE speed>/<modulation>/REL-MNP
CONNECT <DCE speed>/<modulation>/REL-CELLULAR EC
CONNECT <DCE speed>/<modulation>/REL-LAPM - CELULAR EC with the modulation /V.FC, /K56, /V.34, /V.32, /V.22, or /FSK3 In a non-reliable V.21 or Bell 103 connections, the message displays as CONNECT.
4 Not supported in synchronous mode.
Table 68 Result Codes
Modulation
Speed
\V1 rel\V2 rel
\V3
\V4 rel\V5 rel
Non-compressionV.21 or Bell 103
300
1
20
1
20
79
V.23 half-duplex
1200
5
5
24
V.23 split speed
75/1200
11
23
24
V.22
600
9
21
5
21
21
V.22 or Bell 212A
1200
5
22
5
22
80
V.34/V.22bis
2400
10
23
10
23
81
V.34/V.32
4800
30
31
11
31
82
V.34/V.32bis
7200
401
33
24
41
83
V.34/V.32
9600
32
33
12
33
84
V.34/V.32bis
12000
441
33
25
45
85
V.34/V.FC/V.32bis
14400
341
35
13
35
87
V.34/V.FC
16800
60
61
13
61
88
V.34/V.FC
19200
36
37
14
37
89
V.34/V.FC
21600
62
63
13
63
90
V.34/V.FC
24000
64
65
13
65
91
V.34/V.FC
26400
66
67
13
67
92
V.34/V.FC
28800
68
69
13
69
93
V.34
31200
70
71
13
94
94
V.34
33600
72
73
13
95
95
K56flex
32000
130
131
15
131
160
K56flex
34000
132
133
15
133
161
K56flex
36000
134
135
15
135
162
K56flex
38000
136
137
15
137
163
K56flex
40000
138
139
15
139
164
K56flex
42000
140
141
15
141
165
K56flex
44000
142
143
15
143
166
K56flex
46000
144
145
15
145
167
K56flex
48000
146
147
15
147
168
K56flex
50000
148
149
15
149
169
K56flex
52000
150
151
15
151
170
K56flex
54000
152
153
15
153
171
K56flex
56000
154
155
15
155
172
1 When \V0 is set, the following numeric codes display: 14400 bps=34; 12000 bps=44; 7200 bps=40.
\Wn (Split Serial Port Speed)
Determines whether the serial port uses split transmit and receive speed operation when %F1 or %F2 is set to select V.23 mode. Table 69 lists command options.
Default
\W0
Table 69 Split Serial Port Speed Command Options
\Xn (XON/XOFF Passthrough)
Determines whether XON/XOFF flow control characters are sent to the remote or local modem. When XON/XOFF flow control is enabled on the serial port (\ Q1) and XON/XOFF passthrough is enabled (\X1), the modem transmits any XON and XOFF characters sent to the serial port from the local device to the remote device. Table 70 lists command options.
Default
\X0
Caution
# Character Command Set
This section describes modem command that begins with a # character. Table 71 lists # command options.
#En (Answer Mode Escape Sequence)
Determines detection of the escape sequence (+++) when the modem is in answer mode.
Default
#E1
Table 71 #E Command Options
#E0
Enables the escape code sequence in answer mode.
#E1
Disables the escape code sequence in answer mode.
Modem S and :T Register Summary
The modem saves configuration settings in S and :T registers similar to Hayes Smartmodem 2400 registers. Each register controls a single modem function or is bit-mapped to control several functions. This section describes commands to display and change register values. We recommend that, wherever possible, you use the following commands only to display register contents and use the AT command set to change register values.
Read All Registers
The %Rn command displays the contents of an entire register set. The register set contents are displayed as a table in decimal and hexadecimal format.
%R0 displays the contents of all S registers.
%R1 displays the contents of all :T registers.
Point to a New Reference Register
The Sn and :Tn commands set the modem register pointer to register n. Register n then becomes the reference register for following register commands.
ATSn sets the modem register pointer to S register n.
AT:Tn sets the modem register pointer to :T register n.
Read a Configuration Register
The Sn? and :Tn? commands display the contents of register n, in decimal format only. Register n becomes the reference register.
ATSn? displays the contents of S register n.
AT:Tn? displays the contents of :T register n.
Change the Value of a Register
The Sn=x and :Tn=x commands change the value of register n to x. Register n becomes the reference register.
ATSn=x changes the value of S register n to x.
AT:Tn=x changes the value of :T register n to x.
Display the Value of the Reference Register
The AT? command displays the value of the last S register referenced in a read, write, or pointer command.
Change the Value of the Reference Register
The AT=x command changes the value of the last S register referenced to x.
S Register Descriptions
This section describes the purpose and format of each S register.
S0 (Ring to autoanswer On)
Register S0 specifies the number of rings before the modem answers. Set register S0 to zero to disable autoanswer. Ring signals are ignored for 5 seconds after disconnect.
Range
0 to 255 rings
Default
1 ring
S1 (Ring Counter)
Counts the rings before the modem answers a call. If there is no ring within eight seconds of the last ring, S1 is reset to zero. Ring signals are ignored for five seconds after disconnect.
S2 (Escape Code Character)
Specifies the character used for the three-character escape code sequence. When the modem is in connect state and receives the escape code sequence, it enters command state. Setting register S2 to zero disables the escape code character. Register S12 sets the guard time that must be present before and after the escape code character.
Range
0 to 255 (ASCII decimal)
Default
43 (+)
S3 (Carriage Return Character)
Specifies the carriage return (CR) character. The carriage return terminates command lines and result codes.
Range
0 to 127 (ASCII decimal)
Default
13 (Carriage Return)
S4 (Line Feed Character)
Specifies the linefeed (LF) character. The linefeed character follows a carriage return at the end of command lines and result codes.
Range
0 to 127 (ASCII decimal)
Default
10 (Linefeed)
S5 (Backspace Character)
Specifies the backspace (BS) character.
Range
0 to 32 (ASCII decimal)
Default
8 (Backspace)
S6 (Wait Before Dialing)
Specifies the time the modem waits after transitioning off-hook before dialing. This is a minimum of two seconds, even if register S6 is set to a value less than 2. Register S6 is used only when the X0, X1, or X3 command (Extended Result Code) is set.
Range
2 to 255 seconds
Default
2 seconds
S7 (Wait for Carrier After Dial)
Specifies the time that the modem waits for one of the following:
•
•
•
•
Range
0 to 255 seconds
Default
60 seconds
S8 (Pause Time for Dial Delay)
Specifies the time the modem waits when the pause dial modifier (,) is used in a dial string.
Range
0 to 255 seconds
Default
0
S9 (Carrier Detect Response Time)
Specifies the time that a signal must be present before the modem recognizes it as carrier. Register S9 is only used in normal and direct modes.
Range
0 to 255 (0.1-second increments)
Default
6 (0.6 seconds)
S10 (Delay for Hangup After Carrier Loss)
Specifies the time the modem waits before hanging up after loss of carrier, allowing for a temporary loss. Both modems should have equal values set. If the S10 values of the two modems are unequal, disconnection occurs when the lower value is reached. When register S10 is set to 255, the modem functions as if carrier is always present. After disconnecting, the modem waits a minimum of five seconds before going off-hook in originate mode.
Note
Range
0 to 255 (0.1-second increments)
Default
60 (6 seconds)
S11 (DTMF Tone-Dialing Speed)
Specifies the time interval in milliseconds between tones when the modem is dialing over a tone line.
Range
50 to 100 milliseconds
Default
50 milliseconds
S12 (Escape Code Guard Time and Remote Access Attention Sequence Guard Time)
Sets the minimum quiet time before and after the three-character escape code. The interval between characters in the escape code or remote access attention sequence must be less than this guard time. If S12 is zero, the time to enter the escape code or attention sequence does not affect recognition.
In normal mode, register S12 sets the guard time that precedes and follows the attention character sequence. It should be set to the same value on both the originating and answering modems. Reliable mode uses its own timing and ignores register S12.
Range
0 to 255 (0.02-second increments)
Default
50 (1 second)
S14 (Bit-Mapped Register)
Register S14 is bit-mapped for the functions listed in Table 72.
Table 72 S14 Bit-Mapped Register
S16 (Bit-Mapped Register for Test Options)
Register S16 is a read-only register that displays loopback test option status and is available only when the modem is in normal or direct mode. The modem does not support diagnostic tests in Bell 103, V.13, V.21, or V.23 modes. The register is bit-mapped for the functions listed in Table 73.
Table 73 Register S16 Functions
S18 (Test Timer)
Specifies the maximum elapsed time for a modem loopback diagnostic test. Register S18 is available only when the modem is in normal or direct mode. If the register is set to zero, enter the &T0 command (End Test in Progress) to end a test. Register S18 is not supported for V.54 loopback tests by switch or circuit.
Range
0 to 255 seconds
Default
0 (disables the timer)
S21 (Bit-Mapped Register)
Register S21 is bit-mapped for the functions listed in Table 74.
S22 (Bit-Mapped Register)
Register S22 is bit-mapped for the functions listed in Table 75.
Table 75 Register S22 Functions
S23 (Bit-Mapped Register)
Register S23 is bit-mapped for the functions listed in Table 76.
Table 76 Register S23 Functions
S25 (Delay to DTR and Asynchronous/Synchronous Time Delay)
The modem ignores an on-to-off transition of DTR that is less than the register S25 time delay.
Range
0 to 255 (0.01-second increments for Delay to DTR, 1 second for asynchronous mode)
Default
5 (0.05 seconds for Delay to DTR, 5 seconds for asynchronous mode)
S27 (Bit-Mapped Register)
Register S27 is bit-mapped for the functions listed in Table 77.
Table 77 Register S27 Functions
0, 1
Not supported
-
2, 3, 4, 5
Not used
-
6
Answer tone at 1200 bps
0 CCITT V.22 bis/V.22
1 Bell 212A
7
Not used
-
:T Register Descriptions
This section describes the purpose and format of each supported :T register.
:T0 (Timer for V.22 bis, V.22, and V.32 Modes During Multi-Protocol Answer)
Register :T0 sets the time limit for the modem to establish a V.32, V.22 bis, or V.22 connection before switching to establish a V.23 split speed or V.21 connection. In this time period, the modem sends V.22 bis or V.22 carrier. This register setting requires 1200-bps or higher operation with %F0%L1.
Range
0 to 255 (0.1-second increments)
Default
40 (4 seconds)
:T3 (Timer for V.21 and V.23 Answer Tone Duration)
Register :T3 is used in V.21 mode (%F0 is set and the modem speed is 300 bps) or V.23 mode (%F1, %F2, or %F3).
In answer mode, register :T3 sets the time limit for the V.25 answer tone sent by the answering modem to the originating modem. When :T3 is zero, no answer tone is sent. All V.21 and V.23 answers begin with two seconds of silence before sending an answer tone, unless :T3 is zero.
In originate mode, register :T3 sets the time the originating modem waits after detecting an answer tone before proceeding with the connection. When :T3 is zero, the originating modem does not wait for an answer tone.
Range
0 to 33 (0.1-second increments)
Default
33 (3.3 seconds)
:T4 (Timer for Line Turnaround Delay and Carrier On)
Register :T4 specifies the minimum time that the modem waits for the remote modem to respond after turning carrier off before turning carrier back on again to resume sending data. Register :T4 is used only in normal mode V.23 half-duplex connections.
Range
0 to 255 (12.5-millisecond increments)
Default
20 (250 milliseconds)
:T6 (Timer for DCD Turn On Delay)
Register :T6 specifies the time that the modem waits after it raises carrier before it starts looking for data. This register can be set to ignore noise that occurs when DCD is raised in V.23 half-duplex connections. If :T6 is set to zero, the modem waits 256 milliseconds before looking for data. Register :T6 is used only in normal mode V.23 half-duplex connections.
Range
0 to 255 milliseconds
Default
200 milliseconds
:T9 (Primary XON Flow Control Character)
Register :T9 specifies the character used for primary XON flow control on the modem and serial ports. Both modems must use the same primary flow control characters during normal connections. Use the \ Q1 or \ Q4 command (Serial Port Flow Control), and \G1 or \G2 command (Modem Port Flow Control) to specify primary flow control.
Range
0 to 255 (decimal value of an 8-bit ASCII character)
Default
17 (DC1 or 11 hexadecimal)
:T10 (Primary XOFF Flow Control Character)
Register :T10 specifies the character used for primary XOFF flow control on the modem and serial ports. Both modems must use the same primary flow control characters during normal connections. Use the \ Q1 or \ Q4 command (Serial Port Flow Control) options, and \G1 or \G2 command (Modem Port Flow Control) options to specify primary flow control.
Range
0 to 255 (decimal value of an 8-bit ASCII character)
Default
19 (DC3 or 13 hexadecimal)
:T11 (Secondary XON Flow Control Character)
Register :T11 specifies the character used for secondary XON flow control on the modem's serial port. Use the -F1\ Q1 or -F1\ Q4 commands to specify secondary flow control.
Range
0 to 255 (decimal value of an 8-bit ASCII character)
Default
249 (F9 hexadecimal)
:T12 (Secondary XOFF Flow Control Character)
Register :T12 specifies the character used for secondary XOFF flow control on the modem serial port. Use the -F1\ Q1 or -F1\ Q4 commands to specify secondary flow control.
Range
0 to 255 (decimal value of an 8-bit ASCII character)
Default
251 (FB hexadecimal)
:T14 (Connect Message Delay Timer)
Register :T14 specifies the time that the modem waits before or after a connect message before CTS, DSR, or DCD is raised. Use this register setting with the @C0 or @C1 command (CTS, DSR, and DCD Message Control options).
Range
0 to 255 (100-millisecond increments)
Default
0
:T16 (CTS Turn On Delay Timer)
Register :T16 specifies the time that the modem waits before raising CTS after DCD or DSR has been raised in connect mode.
Range
0 to 255 (12.5-millisecond increments)
Default
0
:T17 (V.32/V.32 bis Connection Training Timer)
Register :T17 specifies the time limit for exchanging training sequences when establishing V.32 and V.32 bis connections.
To reduce the time required to establish a connection (but increase the modem's sensitivity to noise on the line), set :T17 to a value less than 28.
To reduce the modem's sensitivity to noise (but lengthen the time required to make a connection), set :T17 to a value greater than 28.
Range
0, 1, or 5 to 32 seconds
Default
0 (use dynamic training sequences, equivalent to a setting of 28)
:T19 (Bit-Mapped Register)
Register :T19 specifies the MNP link control. The register is bit-mapped for the functions listed in Table 78.
:T22 (DSR Timer)
Register :T22 specifies the time that the modem waits before DSR transitions off after DCD or CTS transitions off in disconnect mode. For example, if \D2 (Serial Port DSR/CTS Control) and &C1 (Serial Port DCD Control) are set when DCD and CTS transition off, the modem waits for the time specified by register :T22 before setting DSR off.
Range
0 to 255 (12.5-millisecond increments)
Default
34 (425 milliseconds)
:T23 (Bit-Mapped Register)
Register :T23 is bit-mapped for the functions listed in Table 79.
:T26 (Bit-Mapped Register)
Register :T26 is bit-mapped for the functions listed in Table 80.
Default
0
Note that the default should not be changed except when configuring country codes in modem firmware version 2.2.8 or earlier. (See Step 3 on page 32).Table 80 :T26 Bit-Mapped Register
:T51
Register :T51 defaults to 13 and effects V.34 connections. This register was formerly reserved for Lease Line Mode Tx levels, unused in Cisco implementation.
:T52
Register :T52 has been revised to support independent V.90 Tx Power Level Adjust in firmware version 5.3.30. :T52 has been modified for the transmit power level for V.PCM (V.90) links. Default is -12 dBm for V.90 (the same as K56Plus, K56Flex 1.0, and K56Flex 1.1). The transmit level for V.90 modulation may be adjusted up or down with this register. Cisco recommends that it should be used at the default value unless performing specific fault isolation testing.
:T89 (PoS Configuration)
Register :T89 was implemented with version 3.2.10 and has been revised for firmware version 5.3.30. :T89 works in conjunction with :T120 (Answerback Tone Duration) and :T121 (Answerback Tone Configuration for PoS). For more information, see "PoS Support," page 85). Table 81 lists register :T89 configurations.
Bit 1 of :T89 is now defaulted to a 1 (:T89=2). This forces a Normal Mode connection at 300 baud. By turning off this bit, MNP connections will be attempted. If the bit is on (answer modem), and the originate modem is set to \N2, no connection will result.
Set :T89 = 6 for standard PoS devices. For specialized PoS devices using 1650Hz to Quick Connect, set :T89 = 22 (bits 1+2+4 set).
Note
To support Bell 103 PoS terminals, set :T89 to 7. To support V.21 PoS terminals, set :T89 to 6. If V.23 is supported and PoS/QUICK 300 is not, NORMAL mode will be forced in the case of a V.23 connection (:T89 has no effect in this case). Use the following:
•
•
•
•
Note
Default
0010 (0x2).
:T110 (Select V.8 or V.8 bis Modem Exchange Register)
Register :T110 has been revised to default 0d36 matching server-client reported rates over Robbed bit signaling (RBS) in firmware version 5.0.xx.
Default
:t110 = 4 (V.8bis enable, K56Flex. Default for version 3.2.10)
:t110 = 6 (V.8 enable, K56Flex. Default for version 3.1.30)
:t110 = 44 (K56Flex/V.90. Default for version 5.0.20 and later)
Note
:T114 (56KFlex Control Register)
Register :T114 is used by 56-kbps modems to control/configure the modem for CT1 or PRI operation as listed in Table 82.
Default
1
Table 82 Register :T114 Configurations
0
0 Disable K56Flex
1 Enable K56Flex
1
0 Normal Power (-12 dB)
1 High Power in A-Law (-6dB)
:T120 (Answerback Tone Duration)
Register :T120 is implemented with version 3.2.10. This register works in conjunction with :T89 (PoS Configuration). For more information, see "PoS Support," page 85.
The default 0x19 = 0d25 for 2500 msec of 1650Hz tone by default. The project requirement is for this to be configurable for a range between 1500 msec and 3000 msec (1.5 sec. to 3.0 sec.). The actual range for the register is from 0 to 3100 msec (0 to 3.1 sec.) with the default being 2.5 seconds, which is deployed in the field at this time. When setting bit 4 of :T89, the value of :T120 is used for the duration of the tone.
Default
11001 (0x19, 25 decimal) for 2500 milliseconds of 1650 Hz tone. See Table 83.
Table 83 :T120 Answerback Tone Duration
:T121 (Answerback Tone Configuration for PoS)
Register :T121 is implemented with version 3.2.10. This register works in conjunction with :T89 (PoS Configuration). For more information, see "PoS Support," page 85. Table 84 lists :T121 answerback tone configurations.
The default 0x1B = 0d27 for 2700 msec Answerback Tones by default. The project requirement is for this to be configurable for a range between 2500 msec and 3600 msec (2.5 sec. to 3.6 sec.). The actual range for the register is from 100 to 25500 msec (.1 to 25.5 sec.) with the default being 2.7 seconds, which is deployed in the field at this time.
Default
11011 (0x1B, 27 decimal) 2700 milliseconds answerback tones.
Table 84 :T121 Answerback Tone Configuration
:T124 (K56PLUS/V.90 Control)
Register :T124 is implemented with version 5.0.xx. Setting this register to 11 decimal disables K56Plus. Table 85 lists :T124 configurations.
Note
Default
43 (Decimal)
:T127
Register :T127 supports server Rx aggression/nonaggression rate control in firmware version 5.3.30. This register may be used to eliminate cases of speed throttling or excessive V.42 receive errors on marginal circuits. Table 86 lists new bits for register :T127.
Register :T127 has 3 new bits defined (the default is still 0). Bits 2 and 3 are used to reduce the receive speeds for V.90, Flex and V.34 modulations. This is one of the enhanced Cisco Access Server features incorporated under CSCdk89980. Bit 4 is used to disable Digital Pad compensation. Set bit 4 = 1 to disable (CSCdk90934).
A workaround has been added to resolve an issue regarding Lucent-based V.90 clients making excessive (could be as high as 50% depending on client and firmware revision) normal mode connections when the client is set to defaults (S109=1). This client default will negotiate a V.90 or K56flex connection and allow the V.8bis handshake. V.90 was being advertised by the server modem by bit 1 in octet 15 of V.8bis (octet 15 sent as 83). The workaround is to clear this bit (octet 15 sent as 81) which will force a K56flex connection for Lucent clients ONLY. The current K56flex implementation does not have an issue of connecting in Normal mode, therefore connections will be more stable.
Bit 1 of :T127 controls the workaround. The default is zero (:T127=0). To disable the workaround, set :T127=2 (set bit 1).
Table 86 New Bits for Register :T127 (Nonaggressive Settings)
0
0
Do not reduce speed (default)
0
1
Reduce speed by 1 rate (2400 bps)
1
0
Reduce speed by 2 rates (4800 bps)
1
0
Reduce speed by 3 rates (7200 bps)
Debugging
The @E command (detailed modem call status) is an unofficially supported modem status and debugging command that can be used by an experienced user to verify the detailed status of the modem during or after a call. The content of this command might change as required to assist in problem resolution. Therefore, the command might produce results that differ from the description in this section.
The @E0 command results in a single-screen display (press any key for the next screen). The @E1 command results in continuous screen display. Press Ctrl-X or Break to cancel the display.
This section provides two sample reports generated by V.34 and 56K modems. For an explanation of the report, see Table 86. Note that some empirical quality data is provided to assist in the interpretation of this measured data, and the fields change with new firmware releases.
A sample of the @E report generated by a V.34 modem (version 2.2.8 firmware) follows:
at@e1MNP Class 10 V.34/V.FC ModemMODEM HW: OEM 2W United StatesFirmware Rev 2.2.8/85Bootstrap Rev 1.0.5DSP C36 Part/Rev 3035 4241DSP C58 Part/Rev 3035 2041NET ADDR: FFFFFFFFFFFFConnect Time HH:MM:SS 000:02:014 RTS 5 CTS 6 DSR - CD 20 DTR - RIDisconnect Remote - Local - 14,10,9CONNECTION STATUSMod Type IDLETX/RX Spd 600 600 BPSTX/RX Spd Mask NA 0000 HexTX/RX Symbol Rate 2400 2400 HzTX/RX Carrier Frequency 1800 1800 HzTX/RX Trellis Code States 16 16TX/RX Nonlinear Encoding OFF OFFTX/RX Precoding OFF OFFTX/RX Shaping OFF OFFTX Preemphasis Index 0TX Lvl Reduction 0 dBSecondary Channel OFFLINE IMPAIRMENTSTX Lvl REG - 10 dBmTX Lvl RAM - 0 dBTX Lvl Reduction 0 dBTX Lvl - 10 dBmRX Lvl - 16 dBmSignal/Noise Ratio 0Signal/Distortion Ratio 0Eye Quality 0000 HexLower Band Edge 0 HzUpper Band Edge 0 HzPhase Jitter Freq 0 HzPhase Jitter Amp 0.0 degFar Echo Offset (Phase Roll) 0.0 HzFar Echo Lvl = 20log(N)-81 0 NRound Trip Delay 0 msecDropouts > 5dB 0RTRNs Initiated 0RTRNs Accepted 0Rate Changes Initiated 0Rate Changes Accepted 0FF Trip/Block Error Rate 0000 HexEQM FUNCTION STATUSAVG EQM Filter Pole 8A25 HexEQM Gain 8A4E HexEQM Offset 8A77 HexAVG EQM Filter Pole 8AA0 HexAVG EQM Baud Interval 8AC9 HexAVG EQM Sample Size 8AF2 HexAVG EQM 8B1B HexEQM Threshold Lvl 8B44 HexOKA sample of the @E report generated by a 56K modem (version 3.1.30 firmware) follows:
at@e1MNP Class 10 K56flex ModemMODEM HW: OEM 2W United StatesFirmware Rev 3.1.30/85Bootstrap Rev 3.0.4DSP C36 Part/Rev 3635 4241DSP C58 Part/Rev 3635 2041DSP Controller Rev 0101DSP Data Pump Rev 0101NET ADDR: FFFFFFFFFFFFConnect Time 000:00:064 RTS 5 CTS 6 DSR 8 CD 20 DTR - RIDisconnect Remote - Local -Mod Type K56TX/RX Spd 56000 31200 BPSTX/RX Spd Mask NA BFFF HexSymbol Rate 3200 HzTX/RX Carrier Freq 1829 1829 HzTX/RX States 16 16TX/RX NLE OFF ONTX/RX Precoding OFF ONTX/RX Shaping OFF ONTX Preemphasis Index 0TX Lvl REG - 13 dBmTX Lvl RAM - 0 dBTX Lvl Reduct 0 dBTX Lvl - 13 dBmRX Lvl - 14 dBmS/NR 47S/DR 0EQM 1E00 HexAVG EQM 1E0D HexLower/Upper Edge 150 3825 HzPhase Jitter Freq 127 HzPhase Jitter Amp 0.0 degFar Echo Lvl 24592 NRound Trip Delay 0 msecDropouts > 5dB 0RTRNs Init/Accept 0 0RRENs Init/Accept 0 0BLER 0000 HexRBS Counter 000E HexDigital Pad Detected 0000OKTable 87 provides a description of components of the report. Note that the table does not include self-explanatory fields.
Table 87 Debugging Component Report
Firmware Rev
Current firmware version
Bootstrap Rev
Current Boot version
DSP C36 Part/Rev
Current DSP version
DSP Controller Rev1
Current DSP hardware
DSP Data Pump Rev1
Current DSP controller pump
Mod Type
Modulation type—specifies which modulation standard is being implemented on the current connection. If no connection is established, it will read IDLE.
TX/RX Spd
TX/RX Speed—specifies the transmitter and receiver modulation speeds for the current connection. The TX/RX speeds may be different for operating modes that support split-speed operation, such as V.34. Given in bits per second.
TX/RX Spd Mask
TX/RX speed mask—a hex number that shows which speeds the Rockwell DSP is configured to support on a given connection. For V.34, the LSB represents 2400 bps (1=on, 0=off); the next significant bit represents 4800 and so on up to 33.6 kbps.
Symbol Rate
TX/RX symbol rate—a hex number that shows which symbol rate (analog signal event rate) the Rockwell DSP is currently using. For most modes, this will be a fixed number, but V.34 for example will negotiate any of 6 different rates from 2400 to 3429 symbols/second.
TX/RX Carrier Freq
TX/RX carrier frequency—a single-frequency sinusoid that is modulated to transmit binary information in accordance with the selected operating modes. This also will usually be a fixed number except for V.34 where 9 different ones can be chosen. In the V.34 case, a low and a high carrier are available for each of the symbol rates. The appropriate symbol rate and its associated carrier will be selected by the modem during the startup sequence. Given in Hertz.
TX/RX States
TX/RX Trellis Code States
TX/RX Trellis states—Trellis Encoding is a method for improving noise immunity using a convolutional coder to select a sequence of subsets in a partitioned signal constellation. The trellis encoders used in the V.34 Recommendation are used in a feedback structure where the inputs to the trellis encoder are derived from the signal points. For V.34, this parameter tells whether 16, 32, or 64 state encoding is being used.
TX/RX Nonliner Encoding
TX/RX NLE
TX/RX nonlinear encoding—a method for improving distortion immunity near the perimeter of a signal constellation by introducing a non-uniform two-dimensional (2D) signal point spacing.
TX/RX Precoding
TX/RX precoding—a nonlinear equalization method for reducing equalizer noise enhancement caused by amplitude distortion. Equalization is performed at the transmitter using precoding coefficients provided by the remote modem.
TX/RX Shaping
TX/RX shaping—a method by which the noise margin of a modem signal can be maximized by forming signal constellations in high-dimensional spaces thereby reducing the average signal power. V.34 modems use a shell mapping mechanism to achieve a near-spherical signal constellation, yielding a shaping gain of around 1 dB.
TX Preemphasis Index
TX pre-emphasis index—reads the remote modem's PRE-emphasis Request byte value. Pre-emphasis is a linear equalization method where the transmit signal spectrum is shaped to compensate for amplitude distortion. The pre-emphasis filter is selected using a filter index provided by the remote modem; the filters conform to the 11 types outlined in the ITU specifications for the given operating mode.
Secondary Channel2
Secondary channel—tells whether the secondary channel is on or off. The auxiliary channel is a reduced bandwidth data channel which, along with the primary channel, is multiplexed into the bit stream transmitted by the modem. Data conveyed in the auxiliary channel is independent from the primary channel and may consist of secondary channel data and modem control data. The secondary channel is a portion of the auxiliary channel that is made available to the user.
TX Lvl REG
Transmit level register—tells what transmit level the modem is configured for. Given in dBm (decibels referenced to 1 milliwatt through 600 ohms).
TX Lvl RAM
Transmit level RAM—tells what amount of transmit level gain the modem is configured for. The gain may be positive or negative and is used to adjust the transmit level separately from the transmit level configuration. Given in dBm.
Tx Lvl Reduction
TX Lvl Reduction
Transmit level reduction—tells what, if any, reduction in transmit level (power drop) has been negotiated by the modems during handshake. Given in dBm. Valid in V.34 mode only.
TX Lvl
Transmit level —tells what transmit level the modem actually uses; consists of the configured level plus the tx level gain minus the negotiated power drop. Given in dBm.
RX Lvl
Receive level—tells what signal level the modem receiver is detecting. Given in dBm. The following table gives a range of common values for V.34:
-15 to -25 dBm (excellent/optimum)
-26 to -30 dBm (good)
-31 to -35 dBm (fair)
-36 to -42 dBm (poor)
-43 to -48 dBm (connect/no connect threshold)Signal/Noise Ratio
S/NR
Signal/noise ratio—tells what ratio or margin exists between the received signal level and the noise level detected by the receiver. Given in dBm. The following table gives a range of common values versus connect speed (V.34):
SNR Typical V.34 connect speed *
>=46 dBm 33600
45 dBm 31200
44 dBm 28800
42 dBm 26400
39 dBm 24000
35 dBm 21600
32 dBm 19200
31 dBm 16800
29 dBm 14400
27 dBm 12000
24 dBm 9600
22 dBm 7200
19 dBm 4800
16 dBm 2400
* These are empirical values measured in the absence of other impairments. Actual values may vary. Ideal conditions use ISDN-PRI.
Signal/distortion ration
S/DR
Signal/distortion ratio—tells what ratio or margin exists between the received signal level and the harmonic distortion level detected by the receiver.
Eye Quality
EQM
Eye quality measurement—represents the quality of the analog signal. A low number indicates good quality with 0 being the best possible; a high value is considered poor. The modem uses EQM in its rate decision mechanism. Given as a hex number. The following table gives a range of common values (V.34):
< 1000 (good)
to 2000 (fair)
to 3000 (poor)
AVG EQM
Average eye quality—the output of the EQM averaging mechanism. Initial value is 0000 Hex.
Lower/Upper Edge
Lower band edge/upper band edge—the channel low and high bandwidth edge estimates (in Hertz) generated by the V.Fast/V.34 handshake probing.
Phase Jitter Freq
Phase jitter frequency—Phase Jitter is a deviation in the phase of an analog signal having frequency in Hertz and a magnitude in degrees. It results in a pure tone having an associated FM spectrum. In some cases, this spectrum is random and in others it takes the form of discrete multiples and submultiples of AC power frequencies. It can be caused by coupling through from power line associated equipment such as ringing generators.
Phase Jitter Amp
Phase jitter amplitude—Phase Jitter is a deviation in the phase of an analog signal having frequency in Hertz and a magnitude in degrees. It results in a pure tone having an associated FM spectrum. In some cases, this spectrum is random and in others it takes the form of discrete multiples and submultiples of AC power frequencies. It can be caused by coupling through from power line associated equipment such as ringing generators.
Far Echo Offset (Phase Roll)2
Far echo offset—tells how much far end echo frequency offset is present. Given in Hertz.
Far Echo Lvl
Far echo level—represents the power level of the far echo. The value in dBm can be ascertained by inserting the raw numerical value into this formula: LEVEL= 20LOG(N)-81.
Round Trip Delay
Round trip delay—shows the amount of time delay that a signal encounters on a given connection. For instance, If a call is routed over a satellite hop, the delay in one direction will be approximately 500 milliseconds; round trip will be approximately 1000 milliseconds. The initial value is 0 milliseconds.
Dropouts >5dB
Dropouts >5dB—tells how many signal dropouts greater than 5 dBm have occurred during the current connection. The initial value is 0.
RTRNs Init/Accept
Retrains initiated—tells how many retrains have been initiated by the local modem during the current connection. A retrain is a repetition of most of the modem startup or handshake sequence after the modems have been connected. They usually occur in response to disruptions of the communications channel or user intervention.
Retrains accepted—tells how many retrains have been accepted by the local modem during the current connection.
Rate Changes Inititated/Accepted
RRENs Init/Accept
Rate renegotiations initiated—tells how many rate renegotiations have been initiated by the local modem during the current connection. A rate renegotiation is a brief exchange of rate and signal quality information between modems and is used to upshift or downshift the modulation rate after the modems have been connected (much shorter than a full retrain). They usually occur in response to changes in signal quality or user intervention.
Rate renegotiations accepted—tells how many rate renegotiations have been accepted by the local modem during the current connection.
FF Trip/Block Error Rate
BLER
Block errors—tells how many block errors occur over a reliable connection (that is, a connection that has a successfully negotiated error correction protocol).
RBS Counter1
Robbed bit signaling counter— the number of bits robbed by the channelized T1 links in the transmission path.
Digital Pad Detected1
Digital pad detected—expected values are 0, 3, or 6 dB.
Avg EQM Filter Pole2
Average EQM filter pole—determines the bandwidth of the EQM low pass filter. The default is 0000 Hex.
EQM Gain2
EQM gain—this number is used to adjust the rate decision mechanism. A higher number results in a more reliable connection; a lower number results in a less reliable connection. The default is 1000 Hex.
EQM Offset2
EQM offset—used to adjust the rate decision mechanism. A positive number results in a more reliable connection; a negative (two complement) number results in a less reliable connection. The default is 0000 Hex.
AVG EQM Baud Interval2
Average EQM baud interval—refers to the number of symbol intervals or periods between EQM samples. These samples are used to compute a time average of the EQM value. If it is 0, the EQM averaging function is shut off. The default is 0000 Hex.
AVG EQM Sample Size2
Average EQM sample size—refers to the number of EQM samples to be run through the EQM LPF. Default is 0000 Hex.
EQM Threshold Level2
EQM threshold level—represents the trigger threshold for the Rockwell EQMAT. When the EQM value exceeds this threshold, EQMAT bit is set. The modem uses this for performance decisions. The default is 3000 Hex.
1 Supported only on 56K modems (that is, unique to version 3.1.30 firmware).
2 Supported on V.34 modems (that is, unique to version 2.2.8 firmware).
PoS Support
Firmware Version 3.2.10 for K56 digital modems on the Cisco AS5200 and AS5300 platforms incorporates a series of adaptations for PoS quick connects in Europe that are defined best under two sets of modifications. The objective is to enable an immediate V.21 without answer tone for 300 bps PoS and then train up to V.22 with answer tone for 1200 bps PoS. By default, the configuration is locked to 8 bit data, no parity, 1 start, 1 stop bit, and normal mode connections.
Registers :t89, :t120, and :t121 have been allocated to enable 300/1200 quick connections, error correction, pause for DCD to be true, and tone duration timers.
An incoming call will be answered and the answer modem sends out 1650 Hz immediately. The PoS device can send back 980 Hz if configured to do so. Note Bit 3 of :t89 in the section ":T89 (PoS Configuration)," on page 74.
The answer modem detects the data carrier—in this case within 5 milliseconds—at which time the PoS device initiates the transaction request. If the device calling is not a quick connect V.21 device then the 1650 Hz timer will expire (duration of 1650 Hz declared in :t120) and the answer modem will then train up for 1200 bps and send out 2100 Hz answerback tones (duration of answerback tones declared in :t121). The standard answerback period of 3 seconds (+/- 20%) is modifiable by :t121.
PoS Field Applications
The PoS feature is deployed with two main types of PoS devices. One device is a low-speed, instant connect V.21 terminal, which dictates that the modems train up, not down as would typically be the case with Central Site Modems.
The actual initialization string for a European client could be exactly as described in the following example. Note that the string includes the country code specific profile.
Caution
Example of Modemcap Creation, Assignment, Audit
Enter the router configuration mode and create a global modemcap as follows:
access server# conf tEnter configuration commands, one per line. End with CNTL/Z.access server (config)#modemcap edit your_config factory &f&d0%d2@c0b0%m0\n0access server (config)#modemcap edit your_config miscaccess server (config)#li 11access server (config-line)#mod auto type your_configaccess server (config-line)#exiaccess server (config)#exi
Note
With the debug command debug confmodem, audit the resultant profile as follows:
access server# deb confmodemModem Configuration Database debugging is onaccess server #cle li 11[confirm][OK]access server#Dec 11 15:58:20 PST: TTY11: Line reset by "Exec"Dec 11 15:58:20 PST: TTY11: Modem: IDLE->HANGUPDec 11 15:58:20 PST: TTY11: dropping DTR, hanging upDec 11 15:58:20 PST: tty11: Modem: HANGUP->IDLEDec 11 15:58:25 PST: TTY11: restoring DTRDec 11 15:58:26 PST: TTY11: autoconfigure probe startedDec 11 15:58:26 PST: TTY11: Modem command:V.90 56K AT Command Set Support
This section describes the AT commands which have been implemented to accommodate the K56flex and V.90 modulations. See "Connection Result Code Tables," on page 54 for information related to the modem display connection codes.
Note
%Mn
The %Mn command is used to limit the upper (new and faster) modulations. %M sets the upper modulation boundary if you want to limit what modulation is negotiated first. This is normally done to speed up the negotiation process by starting lower down the modulation tree at a modulation that closely matches what the customer expects to use.
The %Bn command is used to limit the speed of the upper (newer/faster) modulations.%M value is set first, then changed to the %B value.
Default
%M4
Range
0 to 4
%M4
•
•
%M3
•
•
•
%M2
•
•
•
%M1
•
•
•
%M0
•
•
•
%Gn%Bn
%Gn%Bn can be used to limit the speeds for a given modulation range selected by %M. This offers an additional level of modulation refinement, but the two (%M and %Gn%Bn) do not have to always be used together. You may only want to play with the speeds without changing the default %M for example, and therefore the latter combination of AT commands are used alone.
•
•
•
•
Default
AT%G1 is the system default for V.90.
Range
The range is dependent upon the port speed.
•
•
•
Baud Rate Interaction Example
Table 88 displays the baud rate interaction for the Kflex EP2 modem.
Cisco Connection Online
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can access CCO in the following ways:
•
•
•
•
•
Modem: From North America, 408 526-8070; from Europe, 33 1 64 46 40 82. Use the following terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and connection rates up to 28.8 kbps.
For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
Note
