Table Of Contents
Voice Port Commands
This chapter documents voice port commands used to configure voice port settings on the Cisco 3600 series and the Cisco MC3810. Commands in this section are listed alphabetically. For information on how to configure voice ports, refer to the Voice, Video, and Home Applications Configuration Guide.
Table 1 lists the voice port commands and the platforms that each is supported on.
Voice port commands for both the Cisco 3600 series and the Cisco MC3810 define the characteristics associated with a particular voice-port signaling type. Voice ports for both the Cisco 3600 series routers and the Cisco MC3810 provide support for three basic voice signaling formats:
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FXO—Foreign Exchange Office interface. The FXO interface is an RJ-11 connector that allows a connection to be directed at the public switched telephone network's (PSTN's) central office (or to a standard PBX interface, if the local telecommunications authority permits). This interface is of value for off-premise extension applications.
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•
The Cisco MC3810 also supports E&M Mercury Exchange Limited (MEL) CAS signaling, which is primarily used in the United Kingdom.
Table 1 lists the Cisco 3600 series voice port commands and the signaling types supported. Table 2 lists the Cisco MC3810 voice port commands and signaling types supported. Because the Cisco MC3810 includes either analog voice ports (if the Analog Voice Module is installed), or digital voice ports (if the Digital Voice Module is installed), the table also lists whether the command is supported on analog voice ports, digital voice ports, or both.
auto-cut-through
To enable the Cisco MC3810 to complete a call when a PBX does not provide an M-lead response, use the auto-cut-through voice-port configuration command. Use the no form of this command to disable the auto-cut-through operation.
auto-cut-through
no auto-cut-through
Syntax Description
This command has no arguments or keywords.
Default
Enabled
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 MA.
The auto-cut-through command applies to E&M voice ports only on the Cisco MC3810.
Example
The following example enables the Cisco MC3810 to complete a call when a PBX does not provide an M-lead response:
voice-port 1/1auto-cut-throughcodec (voice-port)
To configure voice compression on the Cisco MC3810 voice port, use the codec voice-port configuration command. Use the no form of this command to restore the default value.
codec {g729r8 | g729ar8 | g726r32 | g711alaw | g711ulaw}
no codec
Syntax Description
Default
The default is g729ar8 compression mode.
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 MA.
The g729ar8 compression mode can support a maximum of 24 simultaneously active on-net voice calls on the Cisco MC3810 while the g729r8 compression mode can only support a maximum of 12. Both compression modes have a nominal data rate of 8 kbps.
This command applies to both analog and digital voice ports on the Cisco MC3810.
Note
Example
The following example configures voice port 1/1 on the Cisco MC3810 to support g729r8 compression:
voice-port 1/1codec g729r8Related Commands
comfort-noise
To generate background noise to fill silent gaps during calls if VAD is activated, use the comfort-noise voice-port configuration command. Use the no form of this command to provide silence when the remote party is not speaking and VAD is enabled at the remote end of the connection.
comfort-noise
no comfort-noise
Syntax Description
This command has no arguments or keywords.
Default
Enabled
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
Use the comfort-noise command to generate background noise to fill silent gaps during calls if VAD is activated. If comfort-noise is not enabled, and VAD is enabled at the remote end of the connection, the user will hear dead silence when the remote party is not speaking.
The configuration of comfort-noise only affects the silence generated at the local interface; it does not affect the use of VAD on either end of the connection or the silence generated at the remote end of the connection.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
Note
Example
The following example enables background noise on the Cisco 3600 series:
voice-port 1/0/0comfort-noiseRelated Commands
vad
compand-type
To specify the companding standard used to convert between analog and digital signals in PCM systems on the Cisco MC3810, use the compand-type voice-port configuration command. Use the no form of this command to disable the compand type.
compand-type {u-law | a-law}
no compand-type {u-law | a-law}
Syntax Description
u-law
Specifies the North American mu-law ITU-T PCM encoding standard.
a-law
Specifies the European a-law ITU-T PCM encoding standard.
Default
u-law (T1 digital)
a-law (E1 digital)Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 MA.
This command applies only to the Cisco MC3810.
Note
Example
The following example configures a-law encoding on voice port 1/1 on the Cisco MC3810:
voice-port 1/1compand-type a-lawRelated Commands
condition
To manipulate the signaling format bit-pattern for all voice signaling types on the Cisco MC3810, use the condition command. Use the no form of this command to turn off conditioning on the voice-port.
condition {tx-a-bit | tx-b-bit | tx-c-bit | tx-d-bit} {rx-a-bit | rx-b-bit | rx-c-bit | rx-d-bit}
{on | off | invert}
no condition {tx-a-bit | tx-b-bit | tx-c-bit | tx-d-bit} {rx-a-bit | rx-b-bit | rx-c-bit | rx-d-bit}
{on | off | invert}
Syntax Description
Default
No condition (for all transmit or receive A, B, C, and D bits)
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 MA.
This command applies to the Cisco MC3810 only.
Use the condition command to manipulate the bit patterns sent or received by the Cisco MC3810 to match expected patterns on a connected device. Be careful not to destroy the information content of the bit pattern. For example, forcing the A-bit on or off will prevent FXO interfaces from being able to generate both an on-hook and off-hook state.
Example
The following example manipulates the signaling format bit-pattern on voice port 1/1 on the Cisco MC3810:
voice-port 1/1ccondition tx-a-bit invertcondition rx-a-bit invertRelated Commands
connection
To specify a connection mode for a voice port, use the connection voice-port configuration command. Use the no form of this command to disable the selected connection mode.
connection {plar | tie-line | trunk | plar-opx} string
no connection {plar | tie-line | trunk | plar-opx} string
Syntax Description
Default
No connection mode is specified.
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
Use the connection command to specify a connection mode for a specific interface. For example, use the connection plar command to specify a PLAR interface. The string you configure for this command is used as the called number for all calls coming in over this connection. The destination peer is determined by called number.
Use the connection trunk command on a Cisco 3600 series router to specify a straight tie-line connection (in other words, a virtual trunk connection) to a PBX. Voice over IP simulates a trunk connection by creating virtual trunk tie lines between PBXs connected to Cisco 2600 and 3600 series routers on each side of a VoIP connection. (See Figure 1.) In this example, two PBXs are connected using a virtual trunk. PBX-A is connected to Router A via an E&M voice port; PBX-B is connected to Router B via an E&M voice port. The Cisco routers spoof the connected PBXs into believing that a permanent trunk tie line exists between them.
Figure 1 Virtual Trunk Connection
To configure virtual trunk connections in Voice over IP, use the connection trunk command. The following conditions must be met for Voice over IP to support virtual trunk connections:
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–
–
–
•
•
•
Note
VoIP establishes the trunk connection immediately after it is configured. Both ports on either end of the connection are dedicated until you disable trunking for that connection. If for some reason the link between the two switching systems goes down, the virtual trunk re-establishes itself after the link comes back up.
If the connection command is not configured, the standard session application outputs a dial tone when the interface goes off-hook until enough digits are collected to match a dial-peer and complete the call.
The connection tie-line command is used on the Cisco MC3810 when a dial plan requires that additional digits are added in front of any digits dialed by the PBX, and that the combined set of digits are used to route the call via the dial-peers and into the network. The operation is similar to the connection plar command operation, but in this case the tie-line port also waits to collect digits from the PBX. The tie-line digits are also automatically stripped by a terminating port.
Examples
The following example selects PLAR as the connection mode on the Cisco 3600 series, with a destination telephone number of 555-9262:
voice-port 1/0/0connection plar 5559262The following example selects tie-line as the connection mode on the Cisco MC3810, with a destination telephone number of 555-9262:
voice-port 1/1connection tie-line 5559262The following example configures the routers on both sides of a Voice over IP connection (as illustrated in Figure 1) to support trunk connections:
Router A:
configure terminalvoice-port 1/0/0connection trunk +15105554000dial-peer voice 10 potsdestination-pattern +13085551001port 1/0/0dial-peer voice 100 voipsession-target ipv4:172.20.10.10destination-pattern +15105554000Router B:
configure terminalvoice-port 1/0/0connection trunk +13085551000dial-peer voice 20 potsdestination-pattern +15105554001port 1/0/0dial-peer voice 200 voipsession-target ipv4:172.19.10.10destination-pattern +13085551000Related Commands
session-protocol
cptone
To specify a regional analog voice interface-related tone, ring, and cadence setting, use the cptone voice-port configuration command. Use the no form of this command to disable the selected tone.
cptone locale
no cptone locale
Syntax Description
locale
Keyword specifying an analog voice interface-related, default tone, ring, and cadence settings for a specified country.
Valid entries for the Cisco MC3810 are: argentina, australia, austria, belgium, brazil, china, colombia, czechrepublic, denmark, finland, france, germany, greece, hongkong, iceland, israel, italy, japan, korea, luxembourg, malaysia, netherlands, newzealand, northamerica, norway, peru, philippines, poland, portugal, russia, singapore, slovakia, southafrica, spain, sweden, switzerland, taiwan, thailand, turkey, unitedkingdom, and venezuela.
The Cisco 3600 series complies with the ISO 3166 country name standards, which use a two-letter code to represent a country. Valid entries for the Cisco 3600 series are listed in Table 3.
Default
northamerica for the Cisco MC3810
us for the Cisco 3600 seriesCommand Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
The cptone command only affects the tones generated at the local interface. It does not affect any information passed to the remote end of a connection, or any tones generated at the remote end of a connection.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
Examples
The following example configures United States as the call progress tone locale on the Cisco 3600 series:
voice-port 1/0/0cptone usThe following example configures Singapore as the call progress tone locale on the Cisco MC3810:
voice-port 1/1cptone singaporedefine
To define the transmit and receive bits for E&M and E&M Melcas voice signaling on the Cisco MC3810, use the define voice-port configuration command. Use the no form of this command to restore the default value.
define {Tx-bits | Rx-bits} {seize | idle} {0000 | 0001 | 0010 | 0011 | 0100 | 0101 |
0110 | 0111 | 1000 | 1001 | 1010 | 1011 | 1100 | 1101 | 1110 | 1111}
no define {Tx-bits | Rx-bits} {seize | idle} {0000 | 0001 | 0010 | 0011 | 0100 | 0101 |
0110 | 0111 | 1000 | 1001 | 1010 | 1011 | 1100 | 1101 | 1110 | 1111}
Syntax Description
Default
The default is to use the preset signaling patterns as defined in ANSI and CEPT standards, as follows:
For E&M:
Tx-bits idle 0000 (0001 if on E1 trunk)
Tx-bits seize 1111
Rx-bits idle 0000
Rx-bits seize 1111For E&M Melcas:
Tx-bits idle 1101
Tx-bits seize 0101
Rx-bits idle 1101
Rx-bits seize 0101Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 MA.
This command applies to digital voice ports on the Cisco MC3810 only.
Use the define command to match the E&M bit patterns with the attached telephony device. Be careful not to define invalid configurations, such as all 0000 on E1, or identical seize and idle states. Use this command with the ignore command.
Example
To configure a voice-port sending traffic in North American E&M signaling format to convert the signaling to Mercury Exchange Limited (MEL) CAS format, enter the following commands:
voice-port 1/1define rx-bits idle 1101define rx-bits idle 0101define tx-bits seize 1101define tx-bits seize 0101Related Command
condition
ignoredescription
To include a description of what this voice port is connected to, use the description voice-port configuration command. Use the no form of this command to disable this feature.
description string
no description
Syntax Description
Default
Enabled with a null string
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
Use the description command to include descriptive text about this voice-port connection. This information is displayed when you issue a show command and does not affect the operation of the interface in any way.
Examples
The following example identifies voice port 1/0/0 on the Cisco 3600 series as being connected to the Purchasing department:
voice-port 1/0/0description purchasing_deptThe following example identifies voice port 1/1 on the Cisco MC3810 as being connected to the Marketing department:
voice-port 1/1description marketing_deptdial-type
To specify the type of out-dialing for voice port interfaces, use the dial-type voice-port configuration command. Use the no form of this command to disable the selected type of dialing.
dial-type {dtmf | pulse}
no dial-type
Syntax Description
Default
dtmf
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
Use the dial-type command to specify an out-dialing type for an FXO or E&M voice port interface; this command is not applicable to FXS voice ports because they do not generate out-dialing. Voice ports can always detect dtmf and pulse signals. This command does not affect voice port dialing detection.
The dial-type command affects out-dialing as configured for the dial peer.
Examples
The following example configures a voice port on the Cisco 3600 series to support a touch-tone dialer:
voice-port 1/0/0dial-type dtmfThe following example configures a voice port on the Cisco MC3810 to support a rotary (pulse tone) dialer:
voice-port 1/1dial-type pulseecho-cancel coverage
To adjust the size of the echo canceller, use the echo-cancel coverage voice-port configuration command. Use the no form of this command to reset this command to the default value.
echo-cancel coverage value
no echo-cancel coverage value
Syntax Description
value
Number of milliseconds the echo-canceller will cover on a given signal. Valid values are 16, 24, and 32.
Default
16
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
Use the echo-cancel coverage command to adjust the coverage size of the echo canceller. This command enables cancellation of voice that is sent out the interface and received back on the same interface within the configured amount of time. If the local loop (the distance from the analog interface to the connected equipment producing the echo) is longer, the configured value of this command should be extended.
If you configure a longer value for this command, it will take the echo canceller longer to converge; in this case, the user might hear slight echo when the connection is initially set up. If the configured value for this command is too short, the user might hear some echo for the duration of the call because the echo canceller is not cancelling the longer delay echoes.
There is no echo or echo cancellation on the network (for example, non-POTS) side of the connection.
Note
Examples
The following example adjusts the size of the echo canceller to 16 milliseconds on the Cisco 3600 series:
voice-port 1/0/0echo-cancel enableecho-cancel coverage 16The following example adjusts the size of the echo canceller to 16 milliseconds on the Cisco MC3810:
voice-port 1/1echo-cancel enableecho-cancel coverage 16Related Commands
echo-cancel enable
echo-cancel enable
To enable the cancellation of voice that is sent out the interface and is received back on the same interface, use the echo-cancel enable voice-port configuration command. Use the no form of this command to disable echo cancellation.
echo-cancel enable
no echo-cancel enable
Syntax Description
This command has no arguments or keywords.
Default
Enabled for all interface types.
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
The echo-cancel enable command enables cancellation of voice that is sent out the interface and is received back on the same interface; sound that is received back in this manner is perceived by the listener as an echo. Disabling echo cancellation might cause the remote side of a connection to hear an echo. Because echo cancellation is an invasive process that can minimally degrade voice quality, this command should be disabled if it is not needed.
The echo-cancel enable command does not affect the echo heard by the user on the analog side of the connection.
There is no echo path for a 4-wire E&M interface. The echo canceller should be disabled for that interface type.
Note
Examples
The following example enables the echo cancellation feature and adjusts the size of the echo canceller to 16 milliseconds on the Cisco 3600 series:
voice-port 1/0/0echo-cancel enableecho-cancel coverage 16The following example enables the echo cancellation feature and adjusts the size of the echo canceller to 16 milliseconds on the Cisco MC3810:
voice-port 1/1echo-cancel enableecho-cancel coverage 16Related Commands
echo-cancel coverage
non-linearignore
To specify the E&M or E&M Melcas voice port on the Cisco MC3810 to ignore specific receive bits, use the ignore voice-port configuration command. Use the no form of this command to restore the default value.
ignore {rx-a-bit | rx-b-bit | rx-c-bit | rx-d-bit}
no ignore {rx-a-bit | rx-b-bit | rx-c-bit | rx-d-bit}
Syntax Description
rx-a-bit
Ignores the receive A bit.
rx-b-bit
Ignores the receive B bit.
rx-c-bit
Ignores the receive C bit.
rx-d-bit
Ignores the receive D bit.
Default
The default is mode-dependent:
E&M:
no ignore rx-a-bit
ignore rx-b-bit, rx-c-bit, rx-d-bitE&M Melcas:
no ignore rx-b-bit, rx-c-bit, rx-d-bit
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 MA.
This command applies only to digital voice ports on the Cisco MC3810.
Use this command with the define command.
Example
To configure voice-port 1/1 to ignore receive bits b, c, and d, enter the following commands:
voice-port 1/1ignore rx-b-bitignore rx-c-bitignore rx-d-bitRelated Commands
condition
defineimpedance
To specify the terminating impedance of a voice port interface, use the impedance voice-port configuration command. Use the no form of this command to restore the default value.
impedance {600c | 600r | 900c | complex1 | complex2}
no impedance
Syntax Description
600c
Specifies 600 ohms complex.
600r
Specifies 600 ohms real.
900c
Specifies 900 ohms complex.
complex1
Specifies Complex 1.
complex2
Specifies Complex 2.
Default
600r
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
Use the impedance command to specify the terminating impedance of an FXO voice-port interface. The impedance value selected needs to match the specifications from the specific telephony system to which it is connected. Different countries often have different standards for impedance. CO switches in the United States are predominantly 600r. PBXs in the United States are normally either 600r or 900c.
If the impedance is set incorrectly (if there is an impedance mismatch), there will be a significant amount of echo generated (which could be masked if the echo-cancel command has been enabled). In addition, gains might not work correctly if there is an impedance mismatch.
Configuring the impedance on a voice port will change the impedance on both voice ports of a VPM card. This voice port must be shut down and then opened for the new value to take effect.
This command is applicable to FXS, FXO, and E&M voice ports on both the Cisco 3600 series and the Cisco MC3810.
Examples
The following example configures an FXO voice port on the Cisco 3600 series for a terminating impedance of 600 ohms (real):
voice-port 1/0/0impedance 600rThe following example configures an E&M voice port on the Cisco MC3810 for a terminating impedance of 900 ohms (complex):
voice-port 1/1impedance 900cinput gain
To configure a specific input gain value, use the input gain voice-port configuration command. Use the no form of this command to disable the selected amount of inserted gain.
input gain value
no input gain value
Syntax Description
value
Specifies, in decibels, the amount of gain to be inserted at the receiver side of the interface. Acceptable value is any integer from -6 to 14.
Default
0
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
A system-wide loss plan must be implemented using both input gain and output attenuation commands. Other equipment (including PBXs) in the system must be taken into account when creating a loss plan. This default value for this command assumes that a standard transmission loss plan is in effect, meaning that normally, there must be -6dB attenuation between phones. Connections are implemented to provide -6dB of attenuation when the input gain and output attenuation commands are configured with the default value of 0.
You can't increase the gain of a signal going out into the PSTN, but you can decrease it. Therefore, if the voice level is too high, you can decrease the volume by either decreasing the input gain value or by increasing the output attenuation.
You can increase the gain of a signal coming in to the router. If the voice level is too low, you can increase the input gain.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
Examples
The following example configures a 3-decibel gain to be inserted at the receiver side of the interface in the Cisco 3600 series:
port 1/0/0input gain 3The following example configures a 3-decibel gain to be inserted at the receiver side of the interface in the Cisco MC3810:
port 1/1input gain 3Related Commands
output attenuation
music-threshold
To specify the threshold for on-hold music for a specified voice port, use the music-threshold voice-port configuration command. Use the no form of this command to disable this feature.
music-threshold number
no music-threshold number
Syntax Description
Default
-38
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to the Cisco 3600 series only.
Use the music-threshold command to specify the decibel level of music played when calls are put on hold. This command tells the firmware to pass steady data above the specified level. It only affects the operation of VAD when receiving voice.
If the value for this command is set too high, VAD interprets music-on-hold as silence, and the remote end does not hear the music. If the value for this command is set too low, VAD compresses and passes silence when the background is noisy, creating unnecessary voice traffic.
Example
The following example sets the decibel threshold for the music played when calls are put on hold to -35 on the Cisco 3600 series:
voice-port 1/0/0music-threshold -35non-linear
To enable non-linear processing in the echo canceller, use the non-linear voice-port configuration command. Use the no form of this command to disable non-linear processing.
non-linear
no non-linear
Syntax Description
This command has no arguments or keywords.
Default
The default for this command is enabled for all voice-port types.
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
The function enabled by the non-linear command is also generally known as residual echo suppression. This command is associated with the echo canceller operation. The echo-cancel enable command must be enabled for the non-linear command to take effect. Use the non-linear command to shut off any signal if no near-end speech is detected.
Enabling the non-linear command normally improves performance, although some users might perceive truncation of consonants at the end of sentences when this command is enabled.
Examples
The following example enables non-linear call processing on the Cisco 3600 series:
voice-port 1/0/0non-linearThe following example enables non-linear call processing on the Cisco MC3810:
voice-port 1/1non-linearRelated Commands
echo-cancel enable
operation
To select a specific cabling scheme for E&M ports, use the operation voice-port configuration command. Use the no form of this command to restore the default.
operation {2-wire | 4-wire}
no operation {2-wire | 4-wire}
Syntax Description
Default
2-wire operation
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
The operation command only affects voice traffic. Signaling is independent of 2-wire versus 4-wire settings. If the wrong cable scheme is specified, the user might get voice traffic in only one direction.
Configuring the operation command on a voice port changes the operation of both voice ports on a VPM card. The voice port must be shut down and then opened again for the new value to take effect.
This command is not applicable to FXS or FXO interfaces because they are, by definition, 2-wire interfaces.
On the Cisco MC3810, this command only applies to the analog voice module (AVM).
Examples
The following example specifies that an E&M port on the Cisco 3600 series uses a 4-wire cabling scheme:
voice-port 1/0/0operation 4-wireThe following example specifies that an E&M port on the Cisco MC3810 uses a 2-wire cabling scheme:
voice-port 1/1operation 2-wireoutput attenuation
To configure a specific output attenuation value, use the output attenuation voice-port configuration command. Use the no form of this command to disable the selected output attenuation value.
output attenuation value
no output attenuation
Syntax Description
value
The amount of attenuation in decibels at the transmit side of the interface. Acceptable value is any integer from 0 to 14. The default value for FXO, FXS, and E&M ports is 0.
Default
0
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
A system-wide loss plan must be implemented using both input gain and output attenuation commands. Other equipment (including PBXs) in the system must be taken into account when creating a loss plan. This default value for this command assumes that a standard transmission loss plan is in effect, meaning that normally, there must be -6 dB attenuation between phones. Connections are implemented to provide -6 dB of attenuation when the input gain and output attenuation commands are configured with the default value of 0.
You can't increase the gain of a signal going out into the PSTN, but you can decrease it. Therefore, if the voice level is too high, you can decrease the volume by either decreasing the input gain value or by increasing the output attenuation.
Examples
The following example on the Cisco 3600 series configures a 3-decibel gain to be inserted at the transmit side of the interface:
voice-port 1/0/0output attenuation 3The following example on the Cisco MC3810 configures a 6-decibel gain to be inserted at the transmit side of the interface:
voice-port 1/1output attenuation 6Related Command
input gain
playout-delay
To tune the playout buffer on the Cisco MC3810 to accommodate packet jitter caused by switches in the WAN, use the playout-delay voice-port configuration command. Use the no form of this command to restore the default value.
playout-delay {maximum | nominal} value
no playout-delay {maximum | nominal} value
Syntax Description
Default
160 (maximum playout delay)
80 (nominal playout delay)Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 MA.
This command applies only to the Cisco MC3810.
Example
The following example configures a nominal playout delay of 80 milliseconds and a maximum playout delay of 160 milliseconds on voice-port 1/1 on the Cisco MC3810:
voice-port 1/1playout-delay nominal 80playout-delay maximum 160ring cadence
To specify the ring cadence for an FXS voice port on the Cisco MC3810, use the ring cadence voice-port configuration command. Use the no form of this command to restore the default value.
ring cadence [on1 | off1] [on2 | off2] [on3 | off3] [on4 | off4] [on5 | off5] [on6 | off6]
no ring cadence
Syntax Description
Default
on2 off4 (default North American ring pattern)
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 MA.
This command applies only to the Cisco MC3810.
Example
The following example configures the ring cadence for 0.4 seconds on and 0.2 seconds off on voice port 1/1 on the Cisco MC3810, enter the following:
voice-port 1/1 ring cadence on4 off2Related Commands
ring frequency
To specify the ring frequency for a specified FXS voice port, use the ring frequency voice-port configuration command. Use the no form of this command to restore the default value for this command.
ring frequency number
no ring frequency
Syntax Description
number
Ring frequency (Hertz) used in the FXS interface. Valid entries on the Cisco 3600 series are 25 and 50. Valid entries on the Cisco MC3810 are 20 and 30.
Default
25 Hz on the Cisco 3600 series and 20 Hz on the Cisco MC3810
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command is applicable to both the Cisco 3600 series and the Cisco MC3810.
Use the ring frequency command to select a specific ring frequency for an FXS voice port. Use the no form of this command to reset the default value for this command. The ring frequency you select must match the connected equipment. If set incorrectly, the attached phone might not ring or might buzz. In addition, the ring frequency is usually country-dependent and you should take into account the appropriate ring frequency for your area before configuring this command.
This command does not affect ringback, which is the ringing a user hears when placing a remote call.
Examples
The following example configures the ring frequency on the Cisco 3600 series for 25 Hz:
voice-port 1/0/0ring frequency 25The following example configures the ring frequency on the Cisco MC3810 for 20 Hz:
voice-port 1/1ring frequency 20Related Commands
ring cadence
ring numberring number
To specify the number of rings for a specified FXO voice port, use the ring number voice-port configuration command. Use the no form of this command to restore the default value.
ring number number
no ring number number
Syntax Description
number
Number of rings detected before answering the call. Valid entries are numbers from 1 to 10. The default is 1.
Default
One ring
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
Use the ring number command to set the maximum number of rings to be detected before answering a call over an FXO voice port. Use the no form of this command to reset the default value, which is one ring.
Normally, this command should be set to the default so that incoming calls are answered quickly. If you have other equipment available on the line to answer incoming calls, you might want to set the value higher to give the equipment sufficient time to respond. In that case, the FXO interface would answer if the equipment on line did not answer the incoming call in the configured number of rings.
This command is not applicable to FXS or E&M interfaces because they do not receive ringing to receive a call.
Examples
The following example on the Cisco 3600 series sets five rings as the maximum number of rings to be detected before closing a connection over this voice port:
voice-port 1/0/0ring number 5The following example on the Cisco MC3810 sets five rings as the maximum number of rings to be detected before closing a connection over this voice port:
voice-port 1/1ring number 5Related Commands
ring frequency
shutdown (voice-port)
To take the voice ports for a specific voice interface card offline, use the shutdown voice-port configuration command. Use the no form of this command to put the ports back in service.
shutdown
no shutdown
Syntax Description
This command has no arguments or keywords.
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
When you enter the shutdown command, all ports on the voice interface card are disabled. When you enter the no shutdown command, all ports on the voice interface card are enabled. A telephone connected to an interface will hear dead silence when a port is shut down.
Example
The following example takes voice port 1/1/0 on the Cisco 3600 series offline:
configure terminalvoice-port 1/1/0shutdown
Note
signal
To specify the type of signaling for a voice port, use the signal voice-port configuration command. Use the no form of this command to restore the default value for this command. This command applies to analog voice ports only.
For FXO and FXS:
signal {loop-start | ground-start}
no signal
For E&M:
signal {wink-start | immediate | delay-dial}
no signal
Syntax Description
Default
loop-start for FXO and FXS interfaces; wink-start for E&M interfaces
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
On Cisco 3600 series routers, configuring the signal command for an FXS or FXO voice port changes the signal value for both voice ports on a VPM card.
Note
Configuring this command for an E&M voice port changes only the signal value for the selected voice port. In either case, the voice port must be shut down and then activated before the configured values will take effect.
Some PBXs will miss initial digits if the E&M voice port is configured for Immediate signaling. If this occurs, use Delay-Dial signaling instead. Some non-Cisco devices have a limited number of DTMF receivers. This type of equipment must delay the calling side until a DTMF receiver is available.
Example
The following example configures ground start signaling on the Cisco 3600 series, which means that both sides of a connection can place a call and hang up, as the signaling type for a voice port:
configure terminalvoice-port 1/1/1signal ground-startsupervisory disconnect
To enable a supervisory disconnect signal on FXO ports, use the supervisory disconnect voice-port configuration command. Use the no form of this command to disable the supervisory disconnect signal.
supervisory disconnect
no supervisory disconnect
Syntax Description
This command has no arguments or keywords.
Default
Enabled
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 MA.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
This command indicates whether or not supervisory disconnect signaling is available on the FXO port. Supervisory disconnect signaling is a power denial from the switch lasting at least 350 milliseconds. When this condition is detected, the system interprets this as a disconnect indication from the switch and clears the call.
You should configure no supervisory disconnect on the voice port if there is no supervisory disconnect available from the switch.
Note
Examples
The following example configures supervisory disconnect on a Cisco 3600 series voice port:
voice-port 2/1/0supervisory disconnectThe following example configures supervisory disconnect on a Cisco MC3810 voice-port:
voice-port 1/1supervisory disconnecttimeouts initial
To configure the initial digit timeout value for a specified voice port, use the timeouts initial voice-port configuration command. Use the no form of this command to restore the default value.
timeouts initial seconds
no timeouts initial seconds
Syntax Description
Default
10 seconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
Use the timeouts initial command to specify the number of seconds the system will wait for the caller to input the first digit of the dialed digits. The timeouts initial timer is activated when the call is accepted and is deactivated when the caller inputs the first digit. If the configured timeout value is exceeded, the caller is notified through the appropriate tone and the call is terminated.
To disable the timeouts initial timer, set the seconds value to 0.
Examples
The following example sets the initial digit timeout value on the Cisco 3600 series to 10 seconds:
voice-port 1/0/0timeouts initial 10The following example sets the initial digit timeout value on the Cisco MC3810 to 10 seconds:
voice-port 1/1timeouts initial 10Related Commands
timeouts interdigit
timingtimeouts interdigit
To configure the interdigit timeout value for a specified voice port, use the timeouts interdigit voice-port configuration command. Use the no form of this command to restore the default value.
timeouts interdigit seconds
no timeouts interdigit seconds
Syntax Description
Default
10 seconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
Use the timeouts interdigit command to specify the number of seconds the system will wait (after the caller has input the initial digit) for the caller to input a subsequent digit of the dialed digits. The timeouts interdigit timer is activated when the caller inputs a digit and restarted each time the caller inputs another digit until the destination address is identified. If the configured timeout value is exceeded before the destination address is identified, the caller is notified through the appropriate tone and the call is terminated.
To disable the timeouts interdigit timer, set the seconds value to 0.
Examples
The following example sets the interdigit timeout value on the Cisco 3600 series for 10 seconds:
voice-port 1/0/0timeouts interdigit 10The following example sets the interdigit timeout value on the Cisco MC3810 for 10 seconds:
voice-port 1/1timeouts interdigit 10Related Commands
timeouts initial
timingtimeouts wait-release
To configure the timeout value for releasing voice ports on the Cisco MC3810, use the timeouts wait-release voice-port configuration command. Use the no form of this command to restore the default value.
timeouts wait-release {value | infinity}
no timeouts wait-release {value | infinity}
Syntax Description
Default
30 seconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)MA.
This command applies only to the Cisco MC3810.
Example
The following example configures voice port 1/1 on the Cisco MC3810 to stay in the call-failure state for 180 seconds while a busy tone, reorder tone, or out-of-service tone is sent to the voice port.
voice-port 1/1timeouts wait-release 180timing clear-wait
To indicate the minimum amount of time between the inactive seizure signal and the call being cleared for a specified voice port, use the timing clear-wait voice-port configuration command. Use the no form of this command to reset the default value.
timing clear-wait milliseconds
no timing clear-wait milliseconds
Syntax Description
Default
400 milliseconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
Examples
The following example configures the clear-wait duration on a Cisco 3600 series voice port to 300 milliseconds:
voice-port 1/0/0timing clear-wait 300The following example configures the clear-wait duration on a CiscoMC3810 voice port to 300 milliseconds:
voice-port 1/1timing clear-wait 300Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing interdigit
timing percentage
timing pulse
timing pulse-interdigit
timing wink-duration
timing wink-waittiming delay-duration
To specify the delay signal duration for a specified voice port, use the timing delay-duration voice-port configuration command. Use the no form of this command to reset the default value.
timing delay-duration milliseconds
no timing delay-duration milliseconds
Syntax Description
milliseconds
Delay signal duration for delay dial signaling, in milliseconds. Valid entries are numbers from 100 to 5000. Supported on E&M ports only.
Default
2000 milliseconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
The call direction for the timing delay-duration command is out.
Examples
The following example configures the delay signal duration on a Cisco 3600 series voice port to 3000 milliseconds:
voice-port 1/0/0timing delay-duration 3000The following example configures the delay signal duration on a Cisco MC3810 voice port to 3000 milliseconds:
voice-port 1/1timing delay-duration 3000Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing interdigit
timing percentage
timing pulse
timing pulse-interdigit
timing wink-duration
timing wink-waittiming delay-start
To specify the minimum delay time from outgoing seizure to outdial address for a specified voice port, use the timing delay-start voice-port configuration command. Use the no form of this command to reset the default value.
timing delay-start milliseconds
no timing delay-start milliseconds
Syntax Description
milliseconds
Minimum delay time, in milliseconds, from outgoing seizure to outdial address. Valid entries are numbers from 20 to 2000. Supported on E&M ports only.
Default
On Cisco 3600 series, the default value is 300.
On the Cisco MC3810, the default value is 150.Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
The call direction for the timing delay-start command is out.
Examples
The following example configures the delay-start duration on a Cisco 3600 series voice port to 250 milliseconds:
voice-port 1/0/0timing delay-start 250The following example configures the delay-start duration on a Cisco MC3810 voice port to 250 milliseconds:
voice-port 1/1timing delay-start 250Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing interdigit
timing percentage
timing pulse
timing pulse-interdigit
timing wink-duration
timing wink-waittiming delay-with-integrity
To specify the duration of the wink pulse for the delay dial for a specified voice port on the Cisco MC3810, use the timing delay-with-integrity voice-port configuration command. Use the no form of this command to reset the default value.
timing delay-with-integrity milliseconds
no delay-with-integrity milliseconds
Syntax Description
milliseconds
Duration of the wink pulse for the delay dial, in milliseconds. Valid entries are numbers from 0 to 5000. Supported on E&M ports only.
Default
0
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to only the Cisco MC3810.
Example
The following example configures the duration of the wink pulse for the delay dial on a Cisco MC3810 voice port to 10 milliseconds:
voice-port 1/1timing delay-with-integrity 10Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing interdigit
timing percentage
timing pulse
timing pulse-interdigit
timing wink-duration
timing wink-waittiming dial-pulse min-delay
To specify the time between wink-like pulses for a specified voice port on the Cisco 3600 series, use the timing dial-pulse min-delay voice-port configuration command. Use the no form of this command to reset the default value.
timing dial-pulse min-delay milliseconds
no timing dial-pulse min-delay milliseconds
Syntax Description
milliseconds
Time, in milliseconds, between the generation of wink-like pulses. Valid entries are numbers from 0 to 5000.
Default
300 milliseconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to only the Cisco 3600 series.
Use the timing command with the dial-pulse min-delay keyword with PBXs requiring a wink-like pulse, even though they have been configured for delay-dial signaling. If the value for this keyword is set to 0, the router will not generate this wink-like pulse. The call signal direction for this command is in.
Example
The following example configures the time between the generation of wink-like pulses on a Cisco 3600 series voice port to 350 milliseconds:
voice-port 1/0/0timing dial-pulse min-delay 350Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing digit
timing interdigit
timing percentage
timing pulse
timing pulse-interdigit
timing wink-duration
timing wink-waittiming dialout-delay
To specify the dialout delay for the sending digit on a specified voice port on the Cisco MC3810, use the timing dialout-delay voice-port configuration command. Use the no form of this command to reset the default value.
timing dialout-delay milliseconds
no timing dialout-delay milliseconds
Syntax Description
milliseconds
Dialout delay, in milliseconds, for the sending digit or cut-through on an FXO trunk or an E&M immediate trunk. Valid entries are from 100 to 5000 milliseconds.
Default
300 milliseconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to only the Cisco MC3810.
Example
The following example configures the dialout delay on a Cisco MC3810 voice port to 350 milliseconds:
voice-port 1/1timing dialout-delay 350Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing interdigit
timing percentage
timing pulse
timing pulse-interdigit
timing wink-duration
timing wink-waittiming digit
To specify the DTMF digit signal duration for a specified voice port, use the timing digit voice-port configuration command. Use the no form of this command to reset the default value.
timing digit milliseconds
no timing digit milliseconds
Syntax Description
milliseconds
The DTMF digit signal duration, in milliseconds. Valid entries are numbers from 50 to 100. Supported on FXO, FXS and E&M ports.
Default
100 milliseconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
The call signal direction for the timing digit command is out.
Examples
The following example configures the DTMF digit signal duration on a Cisco 3600 series voice port to 50 milliseconds:
voice-port 1/0/0timing digit 50The following example configures the DTMF digit signal duration on a Cisco MC3810 voice port to 50 milliseconds:
voice-port 1/1timing digit 50Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing interdigit
timing percentage
timing pulse
timing pulse-interdigit
timing wink-duration
timing wink-waittiming interdigit
To specify the DTMF inter-digit duration for a specified voice port, use the timing interdigit voice-port configuration command. Use the no form of this command to reset the default value.
timing interdigit milliseconds
no timing interdigit milliseconds
Syntax Description
milliseconds
DTMF inter-digit duration, in milliseconds. Valid entries are numbers from 50 to 500. Supported on FXO, FXS and E&M ports.
Default
100 milliseconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
The call signal direction for the timing interdigit command is out.
Examples
The following example configures the DTMF inter-digit duration on a Cisco 3600 series voice port to 150 milliseconds:
voice-port 1/0/0timing interdigit 150The following example configures the DTMF inter-digit duration on a Cisco MC3810 voice port to 150 milliseconds:
voice-port 1/1timing interdigit 150Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing percentage
timing pulse
timing pulse-interdigit
timing wink-duration
timing wink-waittiming percentbreak
To specify the percentage of a break period for a dialing pulse for a specified voice port on the Cisco MC3810, use the timing percentbreak voice-port configuration command. Use the no form of this command to reset the default value.
timing percentbreak percent
no timing percentbreak percent
Syntax Description
percent
Percentage of the break period for a dialing pulse. Valid entries are numbers from 20 to 80. Supported on FXO and E&M ports only.
Default
50
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to only the Cisco MC3810.
Example
The following example configures the break period percentage on a Cisco MC3810 voice port to 30 milliseconds:
voice-port 1/1timing percentbreak 30Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing interdigit
timing pulse
timing pulse-interdigit
timing wink-duration
timing wink-waittiming pulse
To specify the pulse dialing rate for a specified voice port, use the timing pulse voice-port configuration command. Use the no form of this command to reset the default value.
timing pulse pulses-per-second
no timing pulse pulses-per-second
Syntax Description
pulses-per-second
Pulse dialing rate, in pulses per second. Valid entries are numbers from 10 to 20. Supported on FXO and E&M ports only.
Default
20
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
The call signal direction for the timing pulse command is out.
Examples
The following example configures the pulse dialing rate on a Cisco 3600 series voice port to 15 pulses per second:
voice-port 1/0/0timing pulse 15The following example configures the pulse dialing rate on a Cisco MC3810 voice port to 15 pulses per second:
voice-port 1/1timing pulse 15Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing interdigit
timing percentage
timing pulse-interdigit
timing wink-duration
timing wink-waittiming pulse-interdigit
To specify the pulse inter-digit timing for a specified voice port, use the timing pulse-interdigit voice-port configuration command. Use the no form of this command to reset the default value.
timing pulse-interdigit milliseconds
no timing pulse-interdigit milliseconds
Syntax Description
milliseconds
Pulse dialing inter-digit timing, in milliseconds. Valid entries are numbers from 100 to 1000. Supported on FXO and E&M ports only.
Default
500 milliseconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
The call signal direction for the timing pulse-interdigit command is out.
Examples
The following example configures the pulse-dialing inter-digit timing on a Cisco 3600 series voice port to 300 milliseconds:
voice-port 1/0/0timing pulse-interdigit 300The following example configures the pulse-dialing inter-digit timing on a Cisco MC3810 voice port to 300 milliseconds:
voice-port 1/1timing pulse-interdigit 300Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing interdigit
timing percentage
timing pulse
timing wink-duration
timing wink-waittiming wink-duration
To specify the maximum wink signal duration for a specified voice port, use the timing wink-duration voice-port configuration command. Use the no form of this command to restore the default value.
timing wink-duration milliseconds
no timing wink-duration milliseconds
Syntax Description
milliseconds
Maximum wink signal duration, in milliseconds, for a wink-start signal. Valid entries are numbers from 100 to 400. Supported on E&M ports only.
Default
200 milliseconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
The call signal direction for the timing wink-duration command is out.
Examples
The following example configures the wink signal duration on a Cisco 3600 series voice port to 300 milliseconds:
voice-port 1/0/0timing wink-duration 300The following example configures the wink signal duration on a Cisco MC3810 voice port to 300 milliseconds:
voice-port 1/1timing wink-duration 300Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing interdigit
timing percentage
timing pulse
timing pulse-interdigit
timing wink-waittiming wink-wait
To specify the maximum wink-wait duration for a specified voice port, use the timing wink-wait voice-port configuration command. Use the no form of this command to reset the default value.
timing wink-wait milliseconds
no timing wink-wait milliseconds
Syntax Description
milliseconds
Maximum wink-wait duration, in milliseconds, for a wink start signal. Valid entries are numbers from 100 to 5000. Supported on E&M ports only
Default
200 milliseconds
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
The call signal direction for the timing wink-wait command is out.
Examples
The following example configures the wink-wait duration on a Cisco 3600 series voice port to 300 milliseconds:
voice-port 1/0/0timing wink-wait 300The following example configures the wink-wait duration on a Cisco MC3810 voice port to 300 milliseconds:
voice-port 1/1timing wink-wait 300Related Commands
timeouts initial
timeouts interdigit
timeouts wait-release
timing clear-wait
timing delay-duration
timing delay-start
timing delay-with-integrity
timing dialout-delay
timing dial-pulse min-delay
timing digit
timing interdigit
timing percentage
timing pulse
timing pulse-interdigit
timing wink-durationtype (voice)
To specify the E&M interface type, use the type voice-port configuration command. Use the no form of this command to reset the default value.
type {1 | 2 | 3 | 5}
no type
Syntax Description
Default
1
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco 3600 series and the Cisco MC3810.
Use the type command to specify the E&M interface for a particular voice port. With 1, the tie-line equipment generates the E-signal to the PBX type grounding the E-lead. The tie-line equipment detects the M-signal by detecting current flow to ground. If you select 1, a common ground must exist between the line equipment and the PBX.
With 2, the interface requires no common ground between the equipment, thereby avoiding ground loop noise problems. The E-signal is generated toward the PBX by connecting it to SG. The M-signal is indicated by the PBX connecting it to SB. While Type 2 interfaces do not require a common ground, they do have the tendency to inject noise into the audio paths because they are asymmetrical with respect to the current flow between devices.
Note
With 3, the interface operates the same as Type 1 interfaces with respect to the E-signal. The M-signal, however, is indicated by the PBX connecting it to SB on assertion and alternately connecting it to SG during inactivity. If you select 3, a common ground must be shared between equipment.
With 5, the Type 5 line equipment indicates E-signal to the PBX by grounding the E-lead. The PBX indicates M-signal by grounding the M-lead. A Type 5 interface is quasi-symmetrical in that while the line is up, current flow is more or less equal between the PBX and the line equipment, but noise injection is a problem.
Examples
The following example selects Type 3 as the interface type for your voice port on the Cisco 3600 series:
voice-port 1/0/0type 3The following example selects Type 3 as the interface type for your voice port on the Cisco MC3810:
voice-port 1/1type 3vad (voice port)
To enable voice activity detection (VAD) for the calls using this voice port, use the vad voice-port configuration command. Use the no form of this command to disable VAD.
vad
no vad
Syntax Description
This command has no arguments or keywords.
Default
VAD is not enabled
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
Use the vad command to enable voice activity detection. With VAD, silence is not transmitted over the network, only audible speech. If you enable VAD, the sound quality will be slightly degraded but the connection will monopolize much less bandwidth. If you use the no form of this command, VAD is disabled on the voice-port.
Note
Example
The following example enables VAD:
voice-port 1/1vadRelated Commands
comfort-noise
voice confirmation-tone
To disable the two-beep confirmation tone for PLAR or PLAR Off Premises eXtension (OPX) connections, use the voice confirmation-tone voice-port command. Use the no form of this command to enable the two-beep confirmation tone.
voice confirmation-tone
no voice confirmation-tone
Syntax Description
This command has no arguments or keywords.
Default
The two-beep confirmation tone is heard on the PLAR or PLAR OPX connection.
Command Mode
Voice-port configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3 MA.
This command applies only to the Cisco MC3810.
Use this command to disable the two-beep confirmation tone that a caller hears when picking up the handset for PLAR and PLAR OPX connections. This command is only valid if the voice port connection command is set to PLAR or PLAR OPX.
Example
The following example disables the two-beep confirmation tone on voice port 1/1 on the Cisco MC3810:
voice-port 1/1connection plar-opxvoice confirmation-toneRelated Commands
voice-port
To enter the voice-port configuration mode, use the voice-port global configuration command.
For the Cisco 3600 series:
voice-port slot-number/subunit-number/port
For the Cisco MC3810:
voice-port slot/port
Syntax Description
For the Cisco 3600 series:
For the Cisco MC3810:
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(1)T.
This command applies to both the Cisco MC3810 and the Cisco 3600 series.
Use the voice-port configuration command to switch to the voice-port configuration mode form the global configuration mode. Use the exit command to exit the voice-port configuration mode and return to the global configuration mode.
For more information about the physical characteristics of your voice network module, or how to install it, refer to the installation documentation that came with your voice network module.
Examples
The following example accesses the voice-port configuration mode for port 0, located on subunit 0 on a voice interface card installed in slot 1 for the Cisco 3600 series:
configure terminalvoice-port 1/0/0The following example accesses the voice-port configuration mode for digital voice port 24 on a Cisco MC3810 with a DVM installed:
configure terminalvoice-port 1/24Related Commands
dial-peer voice
