ISDN Voice Configuration Guide, Cisco IOS Release 12.4T
Basic ISDN Voice-Interface Configuration
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Contents

Basic ISDN Voice-Interface Configuration

Last Updated: December 15, 2011

This chapter describes how to configure ISDN BRI and PRI ports to support voice traffic.

For more information about related Cisco IOS voice features, see the following:

  • "Overview of ISDN Voice Interfaces"
  • Entire Cisco IOS Voice Configuration Library--including library preface and glossary, other feature documents, and troubleshooting documentation--at http://www.cisco.com/en/US/docs/ios/12_3/vvf_c/cisco_ios_voice_configuration_library_glossary/vcl.htm

For a list of references cited in this chapter, see the Additional References.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Prerequisites for Configuring an ISDN Voice Interface

  • Perform the prerequisites that are listed in the "Prerequisites for Configuring ISDN Voice Interfaces" section.
  • Obtain PRI or BRI service and T1 or E1 service from your service provider, as required. Ensure that the BRI lines are provisioned at the switch to support voice calls.
  • Establish a working IP, Frame Relay, or ATM network. Ensure that at least one network module or WAN interface card is installed in the router to provide connection to the LAN or WAN.
  • Complete your company's dial plan.
  • Establish a working telephony network based on your company's dial plan and configure the network for real-time voice traffic.
  • Cisco 2600 series and Cisco 3600 series--Install digital T1 or E1 packet-voice trunk network modules, BRI voice interface cards, and other voice interface cards as required on your network.
  • Cisco 7200 series--Install a single-port 30-channel T1/E1 high-density voice port adapter.
  • Cisco MC3810--Install the required digital voice modules (DVMs), BRI voice module (BVM), and multiflex trunk modules.
  • Configure, for all platforms (as required), the following:
    • Voice card and controller settings
    • Serial and LAN interfaces
    • Voice ports
    • Voice dial peers

Restrictions for Configuring an ISDN Voice Interface

Restrictions are described in the "Restrictions for Configuring ISDN Voice Interfaces" section.

Information About ISDN Voice Interfaces

General information about ISDN voice interfaces is presented in the "Information About ISDN Voice Interfaces" section.

How to Configure an ISDN Voice Interface

Configuring a Router for ISDN BRI Voice-Interface Support

This section contains the following procedures:

Configuring BRI NT and TE Interfaces

To configure BRI NT and TE interfaces, perform the following steps.


Note
Set up each channel for either user side or network side.
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    isdn switch-type switch-type

4.    Cisco MC3810

5.    no ip address

6.    isdn overlap-receiving

7.    isdn twait-disable

8.    isdn spid1 spid-number [ldn]

9.    isdn spid2 spid-number [ldn]

10.    isdn incoming-voice {voice | modem}

11.    shutdown

12.   Do one of the following:

  • isdn layer1-emulate user
  • isdn layer1-emulate network

13.    no shutdown

14.    network-clock-priority {low | high}

15.    Cisco MC3810 Only

16.   Do one of the following:

  • isdn protocol-emulate user
  • isdn protocol-emulate network

17.    isdn sending-complete

18.    isdn static-tei tei-number

19.    isdn point-to-point-setup

20.    exit

21.    Cisco MC3810

22.    Repeat the appropriate steps for the other BRI NT/TE interfaces.


DETAILED STEPS
 Command or ActionPurpose
Step 1
enable


Example:

Router> enable

 

Enters privileged EXEC mode. Enter your password when prompted.

 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters configuration mode.

 
Step 3
isdn switch-type switch-type


Example:

Router(config)# isdn switch-type basic-qsig

 

Configures the telephone-company ISDN switch type. Table 3 on page 9 shows a list of switch types.

Note    The only switch types currently supported for an NT interface are basic-net3 and basic-qsig.
 
Step 4
Cisco MC3810


Example:

interface bri number



Example:

Other Supported Routers



Example:

interface bri slot/port



Example:

Router(config)# interface bri 1/1

 

Enters interface configuration mode for the specified port, connector, or interface card number (location of voice module) or slot/port (location of voice network module and voice interface card).

 
Step 5
no ip address


Example:

Router(config-if)# no ip address

 

Specifies that there is no IP address for this interface.

 
Step 6
isdn overlap-receiving


Example:

Router(config-if)# isdn overlap-receiving

 

(Optional) Activates overlap signaling to send to the destination PBX. In this mode, the interface waits for possible additional call-control information.

 
Step 7
isdn twait-disable


Example:

Router(config-if)# isdn twait-disable

 

(Optional) Delays a national ISDN BRI switch for a random length of time before activating the Layer 2 interface at switch startup. Use this command when the ISDN switch type is basic-ni1. Twait time is enabled by default.

 
Step 8
isdn spid1 spid-number [ldn]


Example:

Router(config-if)# isdn spid1 40855501220101

 

(Optional; TE only) Service-profile identifier (SPID) and optional local directory number for the B1 channel. Currently, only DMS-100 and NI-1 switch types require SPIDs. Although some switch types might support a SPID, Cisco recommends that you set up ISDN service without SPIDs.

 
Step 9
isdn spid2 spid-number [ldn]


Example:

Router(config-if)# isdn spid2 40855501220102

 

(Optional; TE only) Specifies SPID and optional local directory number for the B2 channel.

 
Step 10
isdn incoming-voice {voice | modem}


Example:

Router(config-if)# isdn incoming-voice voice

 

Configures the port to treat incoming ISDN voice calls as voice calls that are handled by either a modem or a voice DSP, as directed by the call-switching module.

 
Step 11
shutdown


Example:

Router(config-if)# shutdown

 

Turns off the port (before setting port emulation).

 
Step 12
Do one of the following:
  • isdn layer1-emulate user
  • isdn layer1-emulate network


Example:

Router(config-if)# isdn layer1-emulate user



Example:



Example:



Example:

Router(config-if)# isdn layer1-emulate network

 

(User side only) Configures Layer 1 port mode emulation and clock status for the user--that is, the TE (clock slave).

or

(Network side only) Configures Layer 1 port mode emulation and clock status for the network--that is, the NT (clock master).

 
Step 13
no shutdown


Example:

Router(config-if)# no shutdown

 

Turns on the port.

 
Step 14
network-clock-priority {low | high}


Example:

Router(config-if)# network-clock-priority low

 

(Optional; TE only) Sets priority for recovering clock signal from the network NT device for this BRI voice port. Keywords are as follows:

  • high --First priority (default for BRI voice interface cards)
  • low --Low priority (default for BRI voice modules)
Note    Do not use this command if the port is configured as NT in Step 12 .
 
Step 15
Cisco MC3810 Only


Example:

line-power



Example:

Router(config-if)# line-power

 

Turns on the power supplied from an NT-configured port to a TE device.

 
Step 16
Do one of the following:
  • isdn protocol-emulate user
  • isdn protocol-emulate network


Example:

Router(config-if)# isdn protocol-emulate user



Example:



Example:



Example:

Router(config-if)# isdn protocol-emulate network

 

(User side only) Configures Layer 2 and Layer 3 port mode emulation and clock status for the user--that is, the TE (clock master).

or

(Network side only) Configures Layer 2 and Layer 3 port mode emulation and clock status for the network--that is, the NT (clock slave).

 
Step 17
isdn sending-complete


Example:

Router(config-if)# isdn sending-complete

 

(Optional) Configures the voice port to include the "Sending Complete" information element in the outgoing call-setup message. This command is used in some geographic locations, such as Hong Kong and Taiwan, where the "Sending Complete" information element is required in the outgoing call setup message.

 
Step 18
isdn static-tei tei-number


Example:

Router(config-if)# isdn static-tei 0

 

(Optional) Configures a static ISDN Layer 2 terminal endpoint identifier (TEI).

 
Step 19
isdn point-to-point-setup


Example:

Router(config-if)# isdn point-to-point-setup

 

(Optional) Configures the ISDN port to send SETUP messages on the static TEI (point-to-point link).

Note    A static TEI must be configured in order for this command to be effective.
 
Step 20
exit


Example:

Router(config-if)# exit

 

Exits the current mode.

 
Step 21
Cisco MC3810


Example:

clear interface bri number



Example:

Other Supported Routers



Example:

clear interface bri slot/port



Example:

Router# clear interface bri 1/1

 

(Optional) Resets the specified port, connector, or interface card number (location of voice module) or slot/port (location of voice network module and voice interface card). The interface needs to be reset if the static TEI number was configured in Step 18 .

 
Step 22
Repeat the appropriate steps for the other BRI NT/TE interfaces. 

--

 
What to Do Next


Note
To complete voice configuration, set up your voice ports and dial peers.

Verifying BRI Interfaces

To verify BRI interfaces, perform the following steps (listed alphabetically).

SUMMARY STEPS

1.    show controllers bri number or show controllers bri slot/port

2.    show interfaces bri

3.    show isdn {active [serial-number] | history [serial-number]}

4.    show isdn {memory | status | timers

5.    show isdn status

6.    show running-config

7.    show voice port slot/port | summary


DETAILED STEPS
Step 1   show controllers bri number or show controllers bri slot/port

Use this command to display information about the specified BRI port, connector, or interface card number (location of voice module) or slot/port (location of voice network module and voice interface card).

Step 2   show interfaces bri

Use this command to display information about the physical attributes of the BRI B and D channels. In the output, look for the term spoofing , which indicates that the interface presents itself to the Cisco IOS software as operational.

Step 3   show isdn {active [serial-number] | history [serial-number]}

Use this command to display current (active keyword) or both historic and current (history keyword) call information for all ISDN interfaces or, optionally, a specific ISDN PRI interface (created and configured as a serial interface). Information displayed includes called number, remote node name, seconds of connect time, seconds of connect time remaining, seconds idle, and advice of charge (AOC) charging time units used during the call.

Step 4   show isdn {memory | status | timers

Use this command to display information about memory, status, and Layer 2 and Layer 3 timers.

Step 5   show isdn status

Use this command to display the status of all ISDN interfaces, including active layers, timer information, and switch-type settings.

Step 6   show running-config

Use this command to display basic router configuration.

Step 7   show voice port slot/port | summary

Use this command to display information about BRI voice ports.

Examples

This section provides the following output examples:

Sample Output for the show running-config Command

The following is sample output from a Cisco 2600 series system. Note that BRI1/0 and BRI1/1 are configured as ISDN user side and BRI2/0 and BRI2/1 are configured as ISDN network side. The table below describes significant fields shown in this output 

Router# show running-config
Building configuration...
Current configuration:
!
version 12.2
!
no service udp-small-servers
service tcp-small-servers
!
hostname Router
!
username xxxx password x 11x5xx07
no ip domain-lookup
ip host Labhost 172.22.66.11
ip host Labhost2 172.22.66.12
ip name-server 172.22.66.21
!
.
.
.
interface BRI1/0
no ip address
no ip directed-broadcast
isdn switch-type basic-net3
isdn overlap-receiving
isdn T306 30000
isdn skipsend-idverify
isdn incoming-voice voice
!
interface BRI1/1
no ip address
no ip directed-broadcast
isdn switch-type basic-net3
isdn overlap-receiving
isdn T306 30000
isdn skipsend-idverify
isdn incoming-voice voice
!
interface BRI2/0
no ip address
isdn switch-type basic-net3
isdn overlap-receiving
isdn protocol-emulate network
isdn layer1-emulate network
isdn T306 30000
isdn sending-complete
isdn skipsend-idverify
isdn incoming-voice voice
!
interface BRI2/1
no ip address
isdn switch-type basic-net3
isdn overlap-receiving
isdn protocol-emulate network
isdn layer1-emulate network
isdn T306 30000
isdn sending-complete
isdn skipsend-idverify
isdn incoming-voice voice
!
.
.
.

The following is sample output from a Cisco MC3810 system. The table below describes significant fields shown in this output. 

Router# show running-config
Building configuration...
Current configuration:
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Router
!
no logging console
!
network-clock base-rate 56k
network-clock-select 2 T1 0
network-clock-select 3 system(SCB)
network-clock-select 1 BVM
ip subnet-zero
!
isdn switch-type basic-net3
isdn voice-call-failure 0
call rsvp-sync
!
voice-card 0
!
controller T1 0
 mode atm
 framing esf
 linecode b8zs
!
interface BRI1
no ip address
isdn switch-type basic-net3
isdn protocol-emulate network
isdn layer1-emulate network
isdn incoming-voice voice
isdn T306 30000
isdn skipsend-idverify
no cdp enable
!
interface BRI2
no ip address
isdn switch-type basic-net3
isdn protocol-emulate network
isdn layer1-emulate network
isdn incoming-voice voice
isdn T306 30000
isdn skipsend-idverify
no cdp enable
!
interface BRI3
no ip address
shutdown
network-clock-priority low
isdn switch-type basic-net3
isdn T306 30000
no cdp enable
!
interface BRI4
no ip address
shutdown
network-clock-priority low
isdn switch-type basic-net3
isdn T306 30000
no cdp enable
!
.
.
.

The table below describes significant fields shown in these outputs.

Table 1Significant Fields from the show running-config Command

Field

Description

isdn T306 timer-value

Value of the T306 timer, in ms.

An ISDN timer is started when a Q.931 Disconnect message with progress indicator number 8 is sent. The timer is stopped when a ISDN Release/Disconnect message is received from the other end. The call clears on expiration of the T306 timer.

isdn T310 timer-value

Value of the T310 timer, in ms.

An ISDN timer is started when a Q.931 Call Proceeding message is received. The timer is stopped when a Q.931 Alerting/Connect/Disconnect message is received from the other end. The call clears on expiration of the T310 timer.

Sample Output for the show interfaces bri Command

The following shows sample output for a Cisco 2610. The table below describes significant fields shown in this output. 

Router# show interfaces bri 1/0
BRI3/1 is up, line protocol is up (spoofing)
  Hardware is Voice NT or TE BRI
  MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation VOICE, loopback not set
  Last input 00:00:02, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/0/16 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     26110 packets input, 104781 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 5 interface resets
     0 output buffer failures, 0 output buffers swapped out
     9 carrier transitions

The following shows sample output for a Cisco MC3810. The table below describes significant fields shown in this output. 

Router# show interfaces bri 1
BRI1 is up, line protocol is up (spoofing)
  Hardware is BVM
  MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set
  Last input 19:32:19, output 19:32:27, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/1/16 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     13282 packets input, 53486 bytes, 0 no buffer
     Received 1 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     13292 packets output, 53515 bytes, 0 underruns
     0 output errors, 0 collisions, 4 interface resets
     0 output buffer failures, 0 output buffers swapped out
     33 carrier transitions
Table 2Significant Fields from the show interfaces bri Command

Field (in alpha order)

Description

abort

Illegal sequence of one bits on a serial interface. This usually indicates a clocking problem between the serial interface and the data link equipment.

BRI... is {up | down | administratively down}

Whether the interface hardware is currently active (whether line signal is present) and whether it has been taken down by an administrator.

broadcasts

Total number of broadcast or multicast packets received by the interface.

BW

Bandwidth of the interface in kbps.

bytes

Total number of bytes, including data and media access control (MAC) encapsulation, in the error-free packets sent or received by the system.

carrier transitions

Number of times that the carrier detect signal of a serial interface has changed state. Check for modem or line problems if the carrier detect line is changing state often.

collisions

Number of collisions. These can occur when you have several devices connected on a multiport line.

CRC

Cyclic redundancy checksum generated by the originating station or far-end device does not match the checksum calculated from the data received. On a serial link, CRCs usually indicate noise, gain hits, or other transmission problems on the data link.

DLY

Delay of the interface in microseconds.

encapsulation

Encapsulation method assigned to interface.

five-minute input/output rate

Average number of bits and packets transmitted per second in the last 5 minutes.

frame

Number of packets that are received incorrectly having a CRC error and a noninteger number of octets. On a serial line, this is usually the result of noise or other transmission problems.

giants

Number of packets that are discarded because they exceed the medium's maximum packet size.

Hardware is...

Hardware type.

ignored

Number of received packets that are ignored by the interface because the interface hardware ran low on internal buffers. Broadcast storms and bursts of noise can increase the ignored count.

input errors

Total number of no buffer, runts, giants, CRCs, frame, overrun, ignored, and abort counts. Other input-related errors can also increment the count, so this sum may not balance with the other counts.

input/output queue, drops

Number of packets in output and input queues. Each number is followed by a slash (/), the maximum size of the queue, and the number of packets dropped due to a full queue.

interface resets

Number of times that an interface has been completely reset. This can happen if packets queued for transmission were not sent within several seconds. On a serial line, this can be caused by a malfunctioning modem that is not supplying the transmit clock signal or by a cable problem. If the system recognizes that the carrier detect line of a serial interface is up, but the line protocol is down, it periodically resets the interface in an effort to restart it. Interface resets can also occur when an interface is looped back or shut down.

Internet address is...

IP address and subnet mask, followed by packet size.

keepalive

Whether keepalives are set.

last input

Number of hours, minutes, and seconds since the last packet was successfully received by an interface. Useful for knowing when a nonfunctioning interface failed.

line protocol is {up | down | administratively down}

Whether the software processes that handle the line protocol consider the line usable (that is, whether keepalives are successful).

load

Load on the interface as a fraction of 255 (255/255 is completely saturated), calculated as an exponential average over 5 minutes.

loopback

Whether loopback is set.

MTU

Maximum transmission unit of the interface.

no buffer

Number of received packets that are discarded because there was no buffer space in the main system. Compare with ignored count. Broadcast storms on Ethernets and bursts of noise on serial lines are often responsible for no input buffer events.

output

Number of hours, minutes, and seconds since the last packet was successfully transmitted by an interface.

output errors

Sum of all errors that prevented the final transmission of datagrams out of the interface being examined. Note that this may not balance with the sum of the enumerated output errors, because some datagrams may have more than one error, and others may have errors that do not fall into any of the specifically tabulated categories.

output hang

Number of hours, minutes, and seconds (or never) since the interface was last reset because of a transmission that took too long. When the number of hours in any of the "last" fields exceeds 24 hours, the number of days and hours is printed. If that field overflows, asterisks (**) are printed.

output/input queue, drops

Number of packets in output and input queues. Each number is followed by a slash (/), the maximum size of the queue, and the number of packets dropped due to a full queue.

overrun

Number of times that the serial receiver hardware was unable to hand received data to a hardware buffer because the input rate exceeded the receiver's ability to handle the data.

packets input/output

Total number of error-free packets received or sent by the system.

rely

Reliability of the interface as a fraction of 255 (255/255 is 100 percent reliability), calculated as an exponential average over 5 minutes.

restarts

Number of times that the controller was restarted because of errors

runts

Number of packets that are discarded because they are smaller than the medium's minimum packet size.

underruns

Number of times that the transmitter has been running faster than the router can handle. This may never be reported on some interfaces.

Troubleshooting Tips

Configuring ISDN PRI Voice-Interface Support

This section contains the following procedures:

Configuring PRI Interfaces

To configure PRI interfaces, perform the following steps.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    isdn switch-type switch-type

4.    Cisco AS5300

5.    description string

6.    framing esf

7.    linecode {ami | b8zs | hdb3}

8.    pri-group timeslots range

9.    exit

10.    Cisco AS5300

11.    isdn incoming-voice modem

12.    description string

13.    isdn-bchan-number-order {ascending | descending}

14.    exit


DETAILED STEPS
 Command or ActionPurpose
Step 1
enable


Example:

Router> enable

 

Enters privileged EXEC mode. Enter your password when prompted.

 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters configuration mode.

 
Step 3
isdn switch-type switch-type


Example:

Router(config)# isdn switch-type basic-qsig

 

Configures the telephone company ISDN switch type. Table 3 on page 9 shows a list of switch types.

Note    The only switch types currently supported for an NT interface are basic-net3 and basic-qsig.
 
Step 4
Cisco AS5300


Example:

controller {t1 | e1} 0



Example:

Cisco AS5800 (T1 card)



Example:

controller t1 1/0/0



Example:

Cisco AS5800 (T3 card)



Example:

controller t1 1/0/0 : 1



Example:

Router(config)# controller t1 1/0/0

 

Enters T1/E1 controller configuration mode for the specified (as appropriate) dial shelf, slot, port (or T3 port), and timeslot as follows:

  • Cisco AS5300: T1 0 or E1 0 controller
  • Cisco AS5800 (T1 card): T1 0 controller
  • Cisco AS5800 (T3 card): T1 1 controller
 
Step 5
description string


Example:

Router(config-if)# description interface01

 

Includes a specific description about the digital signal processor (DSP) interface.

 
Step 6
framing esf


Example:

Router(config-controller)# framing esf

 

Defines the framing characteristics.

 
Step 7
linecode {ami | b8zs | hdb3}


Example:

Router(config-controller)# linecode ami

 

Sets the line-encoding method to match that of your telephone-company service provider. Keywords are as follows:

  • ami --Alternate mark inversion (AMI), valid for T1 or E1 controllers. Default for T1 lines.
  • b8zs --B8ZS, valid for T1 controllers only.
  • hdb3 --High-density bipolar 3 (hdb3), valid for E1 controllers only. Default for E1 lines.
 
Step 8
pri-group timeslots range


Example:

Router(config-controller)# pri-group timeslots 1-23

 

Specifies PRI on the specified or timeslots that make up the PRI group. Maximum T1 range: 1 to 23. Maximum E1 range: 1 to 31. Separate low and high values with a hyphen.

Note    You can configure the PRI group to include all available timeslots, or you can configure a select group of timeslots for the PRI group.
 
Step 9
exit


Example:

Router(config-controller)# exit

 

Exits the current mode.

 
Step 10
Cisco AS5300


Example:

interface serial 0: channel-number



Example:

Cisco AS5800



Example:

interface serial 1/0: channel-number



Example:

Router(config)# interface serial 0:23

 

Enters interface configuration mode for the specified PRI slot/port and D-channel ISDN interface. D-channel ISDN interface is (for T1) 23 and (for E1) 15.

 
Step 11
isdn incoming-voice modem


Example:

Router(config-if)# isdn incoming-voice modem

 

Enables incoming ISDN voice calls.

The modem keyword specifies that incoming voice calls are passed over to digital modems, where they negotiate the appropriate modem connection with the far-end modem. Its use here is required.

 
Step 12
description string


Example:

Router(config-if)# description interface02

 

Includes a specific description about the digital signal processor (DSP) interface.

 
Step 13
isdn-bchan-number-order {ascending | descending}


Example:

Router(config-if)# isdn-bchan-number-order descending

 

Configures an ISDN PRI interface to make outgoing call selection in ascending or descending order--that is, to select the lowest or highest available B channel starting at either channel B1 (ascending) or channel B23 for a T1 and channel B30 for an E1 (descending). Default: descending.

Note    Before configuring ISDN PRI on your router, check with your service vendor to determine if ISDN trunk call selection is configured for ascending or descending order. A mismatch between router and switch causes the switch to send an error message stating that the channel is not available.
 
Step 14
exit


Example:

Router(config-if)# exit

 

Exits the current mode.

 

Configuring PRI Voice Ports

Under most circumstances, default voice-port command values are adequate to configure voice ports to transport voice data over your existing IP network. However, because of the inherent complexities of PBX networks, you might need to configure specific voice-port values, depending on the specifications of the devices in your network.

Verifying PRI Interfaces

To verify PRI interfaces, perform the following steps (listed alphabetically).

SUMMARY STEPS

1.    show isdn {active [serial-number] | history [serial-number]}

2.    show isdn status

3.    show vfc slot version

4.    show voice port slot/port | summary


DETAILED STEPS
Step 1   show isdn {active [serial-number] | history [serial-number]}

Use this command to display current (active keyword) or both historic and current (history keyword) call information for all ISDN interfaces or, optionally, a specific ISDN PRI interface (created and configured as a serial interface). Information displayed includes called number, remote node name, seconds of connect time, seconds of connect time remaining, seconds idle, and advice of charge (AOC) charging time units used during the call.

Step 2   show isdn status

Use this command to display the status of all ISDN interfaces, including active layers, timer information, and switch-type settings.

Step 3   show vfc slot version

Use this command to display the version of software residing on the voice feature card in the specified slot.

Step 4   show voice port slot/port | summary

Use this command to display configuration information about a specific voice port.

Troubleshooting Tips

  • Verify that you have dial tone and connectivity.
  • If you have not configured your device to support Direct Inward Dialing (DID), do the following:
  • Dial in to the router and verify that you have dial tone.
  • Enter a dual-tone multifrequency (DTMF) digit. If dial tone stops, you have verified two-way voice connectivity with the router.
  • If you have trouble connecting a call and suspect that the problem is associated with voice-port configuration, do the following:
  • Confirm connectivity by pinging the associated IP address.

Note
For more information, see the Cisco IOS IP Configuration Guide chapter on configuring IP.
  1. Determine if the voice feature card (VFC) is installed correctly.

Note
For more information, see the instructions that came with your voice network module.
  1. Ensure that your (T1-line) a-law or (E1-line) mu-law setting is correct.
  2. If dialing cannot occur, use the debug isdn q931 command to check the ISDN configuration.

Note
For T1 troubleshooting information, see http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800a5f40.shtml

Configuring QSIG Support

This section contains the following procedures:

Configure Global QSIG Support for BRI or PRI

To configure global QSIG support for BRI or PRI, perform the following steps.


Note
For additional guidance on switch-type configuration, see the "ISDN Switch Types for Use with QSIG" section on page 9 .
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    BRI on Cisco MC3810, Cisco 2600 Series, and Cisco 3600 Series

4.    BRI or PRI on Cisco 7200 Series

5.    BRI or PRI on Cisco 7200 Series

6.    exit


DETAILED STEPS
 Command or ActionPurpose
Step 1
enable


Example:

Router> enable

 

Enters privileged EXEC mode. Enter your password when prompted.

 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters configuration mode.

 
Step 3
BRI on Cisco MC3810, Cisco 2600 Series, and Cisco 3600 Series


Example:

isdn switch-type basic-qsig



Example:

PRI on Any Supported Router



Example:

isdn switch-type primary-qsig



Example:

Router(config)# isdn switch-type basic-qsig

 

(Optional) Configures the global ISDN switch type to support QSIG signaling. Table 2 on page 9 shows a list of switch types.

Note    You can configure all interfaces at once by using this command in global configuration mode. Or you can configure one interface at a time by using this command in interface configuration mode.
 
Step 4
BRI or PRI on Cisco 7200 Series


Example:

dspint dspfarm slot/port



Example:

Router(config)# dspint dspfarm 1/1

 

Configures the digital signal processor (DSP) farm at the specified slot/port.

 
Step 5
BRI or PRI on Cisco 7200 Series


Example:

card type {t1 | e1} slot



Example:

Router(config)# card type t1 0

 

Configures card type (T1 or E1) at the specified slot.

 
Step 6
exit


Example:

Router(config)# exit

 

Exits the current mode.

 

Configure Controllers for QSIG over PRI

To configure controllers for QSIG over PRI, perform the following steps.


Note
Steps in this section apply to PRI only, and not to BRI.
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    Cisco MC3810

4.    pri-group timeslots range

5.    exit


DETAILED STEPS
 Command or ActionPurpose
Step 1
enable


Example:

Router> enable

 

Enters privileged EXEC mode. Enter your password when prompted.

 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters configuration mode.

 
Step 3
Cisco MC3810


Example:

controller {t1 | e1} controller-number



Example:

Other Supported Routers



Example:

controller {t1 | e1} slot/port



Example:

Router(config)# controller t1 1/1

 

Enters T1 or E1 controller configuration mode for the specified controller number o r slot/port.

Note    Cisco MC3810 supports QSIG only on controller 1.
 
Step 4
pri-group timeslots range


Example:

Router(config-controller)# pri-group timeslots 1-23

 

Specifies PRI on the specified or timeslots that make up the PRI group. Maximum T1 range: 1-23. Maximum E1 range: 1-31. Separate low and high values with a hyphen.

Note    You can configure the PRI group to include all available timeslots, or you can configure a select group of timeslots for the PRI group.
 
Step 5
exit


Example:

Router(config-controller)# exit

 

Exits the current mode.

 

Configure PRI Interfaces for QSIG

To configure PRI interfaces for QSIG, perform the following steps.


Note
Set up each channel for either user side or network side.
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    Cisco MC3810

4.    isdn switch-type primary-qsig

5.    isdn contiguous-bchan

6.   Do one of the following:

  • isdn protocol-emulate user
  • isdn protocol-emulate network

7.    isdn overlap-receiving

8.    isdn network-failure-cause value

9.    exit


DETAILED STEPS
 Command or ActionPurpose
Step 1
enable


Example:

Router> enable

 

Enters privileged EXEC mode. Enter your password when prompted.

 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters configuration mode.

 
Step 3
Cisco MC3810


Example:

interface serial 1: channel-number



Example:

Other Supported Routers



Example:

interface serial slot/port : channel-number



Example:

Router(config)# interface serial 1/1:23

 

Enters interface configuration mode for the specified PRI slot/port and D-channel ISDN interface. D-channel ISDN interface is (for T1) 23 and (for E1) 15.

 
Step 4
isdn switch-type primary-qsig


Example:

Router(config-if)# isdn switch-type primary-qsig

 

If you did not configure the global PRI ISDN switch type for QSIG support in global configuration mode, configures the interface ISDN switch type to support QSIG signaling.

Conditions that apply to this command in global configuration mode also apply in interface configuration mode. For more information, see the "ISDN Switch Types for Use with QSIG" section on page 9 .

Note    For this interface, this interface configuration command overrides the setting of the isdn switch-type command entered in global configuration mode.
 
Step 5
isdn contiguous-bchan


Example:

Router(config-if)# isdn contiguous-bchan

 

(E1 only) Sets contiguous bearer-channel handling, causing B channels 1 to 30 to map to timeslots 1 to 31, skipping timeslot 16.

 
Step 6
Do one of the following:
  • isdn protocol-emulate user
  • isdn protocol-emulate network


Example:

Router(config-if)# isdn protocol-emulate user



Example:



Example:



Example:

Router(config-if)# isdn protocol-emulate network

 

(User side only) Configures Layer 2 and Layer 3 port mode emulation and clock status for the user--that is, the TE (clock slave). This is the default.

or

(Network side only) Configures Layer 2 and Layer 3 port mode emulation and clock status for the network--that is, the NT (clock master).

Note    On the Cisco MC3810, the isdn protocol-emulate command replaces the isdn switch-type command.
 
Step 7
isdn overlap-receiving


Example:

Router(config-if)# isdn overlap-receiving

 

(Optional) Activates overlap signaling to send to the destination PBX. The interface waits for possible additional call-control information from the preceding PBX.

Note    You can leave the default mode of enbloc , in which all call-setup information is sent in the setup message without need for additional messages from the preceding PINX.
 
Step 8
isdn network-failure-cause value


Example:

Router(config-if)# isdn network-failure-cause 1

 

(Optional) Specifies the cause code to pass to the PBX when a call cannot be placed or completed because of internal network failures.

 
Step 9
exit


Example:

Router(config-if)# exit

 

Exits the current mode.

 

Configure BRI Interfaces for QSIG

To configure BRI interfaces for QSIG, perform the following steps.


Note
Set up each interface for either user side or network side.
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    Cisco MC3810

4.    Cisco MC3810, Cisco 2600 Series, and Cisco 3600 Series Only

5.    Cisco MC3810 Only

6.    Cisco MC3810 Only

7.    Cisco MC3810 Only

8.    Cisco 2600 Series and Cisco 3600 Series Only

9.    isdn sending-complete

10.    Cisco MC3810, Cisco 2600, and Cisco 3600 Series Only

11.   Do one of the following:

  • isdn protocol-emulate user
  • isdn protocol-emulate network

12.    isdn overlap-receiving

13.    isdn network-failure-cause value

14.    exit


DETAILED STEPS
 Command or ActionPurpose
Step 1
enable


Example:

Router> enable

 

Enters privileged EXEC mode. Enter your password when prompted.

 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters configuration mode.

 
Step 3
Cisco MC3810


Example:

interface bri number



Example:

Cisco 2600 Series and Cisco 3600 Series



Example:

interface bri slot/port



Example:

Router(config)# interface bri 1/1

 

Enters interface configuration mode for the specified port, connector, or interface card number (location of voice module) or slot/port (location of voice network module and voice interface card).

 
Step 4
Cisco MC3810, Cisco 2600 Series, and Cisco 3600 Series Only


Example:

isdn static-tei tei-number



Example:

Router(config-if)# isdn static-tei 0

 

Enables use of the ISDN lines.

Note    This command is required. In previous releases, it was set automatically with use of the isdn switch-type basic-qsig command.
 
Step 5
Cisco MC3810 Only


Example:

isdn layer1-emulate user



Example:

Router(config-if)# isdn layer1-emulate user

 

Configures Layer 1 port mode emulation and clock status for the user--that is, the TE (clock slave).

 
Step 6
Cisco MC3810 Only


Example:

isdn layer1-emulate network



Example:

Router(config-if)# isdn layer1-emulate network

 

Configures Layer 1 port mode emulation and clock status for the network--that is, the NT (clock master).

 
Step 7
Cisco MC3810 Only


Example:

network-clock-priority {low | high}



Example:

Router(config-if)# network-clock-priority high

 

(TE only) Sets priority for recovering clock signal from the network NT device for this BRI voice port. Keywords are as follows:

  • high --First priority
  • low --Low priority
Note    Do not use this command if the port is configured as NT in Step 5 .
 
Step 8
Cisco 2600 Series and Cisco 3600 Series Only


Example:

isdn incoming-voice voice



Example:

Router(config-if)# isdn incoming-voice voice

 

Routes incoming voice calls. This is set for voice-capable BRI interfaces by default. The exception is for Cisco 2600 series and Cisco 3600 series BRI S/T TE voice interface cards, where, in the absence of this command, the isdn incoming-voice modem configuration setting converts to isdn incoming-voice voice when it receives an incoming call.

 
Step 9
isdn sending-complete


Example:

Router(config-if)# isdn sending-complete

 

(Optional) Configures the voice port to include the "Sending Complete" information element in the outgoing call-setup message. This command is used in some geographic locations, such as Hong Kong and Taiwan, where the "Sending Complete" information element is required in the outgoing call-setup message.

 
Step 10
Cisco MC3810, Cisco 2600, and Cisco 3600 Series Only


Example:

isdn switch-type basic-qsig



Example:

Router(config-if)# isdn switch-type basic-qsig

 

(Optional) If the service-provider switch type for this BRI port differs from the global ISDN switch type, set the interface ISDN switch type to match the service-provider switch type. The interface ISDN switch type overrides the global ISDN switch type on this interface.

For more information, see the "ISDN Switch Types for Use with QSIG" section on page 9 .

 
Step 11
Do one of the following:
  • isdn protocol-emulate user
  • isdn protocol-emulate network


Example:

Router(config-if)# isdn protocol-emulate user



Example:



Example:



Example:

Router(config-if)# isdn protocol-emulate network

 

(User side only) Configures Layer 2 and Layer 3 port mode emulation and clock status for the user--that is, the TE (clock slave).

or

(Network side only) Configures Layer 2 and Layer 3 port mode emulation and clock status for the network--that is, the NT (clock master).

Note    On the Cisco MC3810, the isdn protocol-emulate command replaces the isdn switch-type command.
 
Step 12
isdn overlap-receiving


Example:

Router(config-if)# isdn overlap-receiving

 

(Optional) Activates overlap signaling to send to the destination PBX and causes the interface to wait for possible additional call-control information from the preceding PINX.

Note    You can leave the default mode of enbloc , in which all call-setup information is sent in the setup message without need for additional messages from the preceding PINX.
 
Step 13
isdn network-failure-cause value


Example:

Router(config-if)# isdn network-failure-cause 1

 

(Optional) Specifies the cause code to pass to the PBX when a call cannot be placed or completed because of internal network failures.

 
Step 14
exit


Example:

Router(config-if)# exit

 

Exits the current mode.

 

Verify the QSIG Configuration

To verify the QSIG configuration, perform the following steps (listed alphabetically).

SUMMARY STEPS

1.    show call history voice record

2.    show cdapi

3.    show controllers t1 or show controllers e1

4.    show dial-peer voice

5.    show isdn

6.    show isdn {active [serial-number] | history [serial-number]}

7.    show isdn service

8.    show isdn status

9.    show rawmsg

10.    show running-config

11.    show voice port slot/port | summary


DETAILED STEPS
Step 1   show call history voice record

Use this command to display information about calls made to and from the router.

Step 2   show cdapi

Use this command to display Call Distributor Application Programming Interface (CDAPI) information.

Step 3   show controllers t1 or show controllers e1

Use this command to display information about T1 and E1 controllers.

Step 4   show dial-peer voice

Use this command to display how voice dial peers are configured.

Step 5   show isdn

Use this command to display information about switch type, memory, status, and Layer 2 and Layer 3 timers.

Step 6   show isdn {active [serial-number] | history [serial-number]}

Use this command to display current (active keyword) or both historic and current (history keyword) call information for all ISDN interfaces or, optionally, a specific ISDN PRI interface (created and configured as a serial interface). Information displayed includes called number, remote node name, seconds of connect time, seconds of connect time remaining, seconds idle, and advice of charge (AOC) charging time units used during the call.

Step 7   show isdn service

Use this command to display the state and the service status of each ISDN channel.

Step 8   show isdn status

Use this command to display the status of all ISDN interfaces, including active layers, timer information, and switch-type settings.

Step 9   show rawmsg

Use this command to display information about memory leaks.

Step 10   show running-config

Use this command to display basic router configuration.

Step 11   show voice port slot/port | summary

Use this command to display summary information about voice-port configuration.

Troubleshooting Tips

  • Use the debug cdapi events | detail} command to display information about CDAPI application events, registration, messages, and more.
  • Use the debug isdn event command to display events occurring on the user side (on the router) of the ISDN interface. ISDN events that can be displayed are Q.931 events (call setup and teardown of ISDN network connections).
  • Use the debug tsp command to display information about the telephony-service provider (TSP).

Examples

This section provides the following output examples:

Sample Output for the show cdapi Command

The following shows sample output for a PRI voice port on a Cisco 3660 series.

Router# show cdapi
Registered CDAPI Applications/Stacks
====================================
Application: TSP CDAPI Application Voice
        Application Type(s) : Voice Facility Signaling
        Application Level   : Tunnel
        Application Mode    : Enbloc
Signaling Stack: ISDN
        Interface: Se5/0:15
Signaling Stack: ISDN
        Interface: Se5/1:15
Signaling Stack: ISDN
        Interface: Se6/0:15
Signaling Stack: ISDN
        Interface: Se6/1:15
CDAPI Message Buffers
=====================
Used Msg Buffers: 0, Free Msg Buffers: 9600
Used Raw Buffers: 0, Free Raw Buffers: 4800
Used Large-Raw Buffers: 0, Free Large-Raw Buffers: 480

The following shows sample output for a PRI voice port on a Cisco MC3810.

Router# show cdapi
Registered CDAPI Applications/Stacks
====================================
Application: TSP CDAPI Application Voice
        Application Type(s) : Voice Facility Signaling
        Application Level   : Tunnel
        Application Mode    : Enbloc
Signaling Stack: ISDN
        Interface: Se1:15
CDAPI Message Buffers
=====================
Used Msg Buffers: 2, Free Msg Buffers: 1198
Used Raw Buffers: 2, Free Raw Buffers: 598
Used Large-Raw Buffers: 0, Free Large-Raw Buffers: 60
Sample Output for the show controller Command

The following shows sample output for a T1 line (not having problems).

Router# show controller T1
T1 3/0 is up.
  Applique type is Channelized T1
  Cablelength is long gain36 0db
  No alarms detected.
  alarm-trigger is not set
  Version info Firmware: 20020812, FPGA: 11
  Framing is ESF, Line Code is B8ZS, Clock Source is Line.
  Data in current interval (425 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Total Data (last 24 hours)
     0 Line Code Violations, 0 Path Code Violations,
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

The following shows sample output for a T1 line (having problems).

Router# show controller T1 2
T1 2 is down.
  Applique type is Channelized T1
  Cablelength is long gain36 0db
  Transmitter is sending remote alarm.
  Receiver has loss of signal.
  alarm-trigger is not set
  Version info of slot 0:  HW: 4, PLD Rev: 0
Manufacture Cookie Info:
 EEPROM Type 0x0001, EEPROM Version 0x01, Board ID 0x42,
 Board Hardware Version 1.32, Item Number 800-2540-02,
 Board Revision A0, Serial Number 15264519,
 PLD/ISP Version 0.0,  Manufacture Date 24-Sep-1999.
  Framing is SF, Line Code is AMI, Clock Source is Internal.
  Data in current interval (329 seconds elapsed):
     1 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 329 Fr Loss Secs, 1 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 329 Unavail Secs
  Total Data (last 24 hours)
     543 Line Code Violations, 0 Path Code Violations,
     3 Slip Secs, 86400 Fr Loss Secs, 364 Line Err Secs, 0 Degraded Mins,
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 86400 Unavail Secs
Sample Output for the show isdn service Command

The following shows sample output for a PRI on a T1 controller.

Router# show isdn service
PRI Channel Statistics:
ISDN Se0:15, Channel (1-31)
  Activated dsl 8
  State (0=Idle 1=Propose 2=Busy 3=Reserved 4=Restart 5=Maint)
  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  Channel (1-31) Service (0=Inservice 1=Maint 2=Outofservice)
  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Sample Output for the show isdn status Command

The following shows sample output for a BRI voice port on a Cisco 3600 series.

Router# show isdn status
Global ISDN Switchtype = primary-qsig
ISDN Serial3/1:15 interface
        dsl 0, interface ISDN Switchtype = primary-qsig
         **** Master side configuration ****
    Layer 1 Status:
        ACTIVE
    Layer 2 Status:
        TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
    Layer 3 Status:
        29 Active Layer 3 Call(s)
    Activated dsl 0 CCBs = 29
        CCB:callid=89BF, sapi=0, ces=0, B-chan=5, calltype=VOICE
.
.
.
CCB:callid=89C8, sapi=0, ces=0, B-chan=14, calltype=VOICE
.
.
.
        CCB:callid=89D9, sapi=0, ces=0, B-chan=1, calltype=VOICE
        CCB:callid=89DA, sapi=0, ces=0, B-chan=2, calltype=VOICE
        CCB:callid=89DB, sapi=0, ces=0, B-chan=3, calltype=VOICE
    The Free Channel Mask: 0x80000018
ISDN Serial3/0:15 interface
        dsl 1, interface ISDN Switchtype = primary-qsig
         **** Master side configuration ****
    Layer 1 Status:
        ACTIVE
    Layer 2 Status:
        TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
        TEI = 0, Ces = 9, SAPI = 16, State = TEI_ASSIGNED
    Layer 3 Status:
        28 Active Layer 3 Call(s)
    Activated dsl 1 CCBs = 28
        CCB:callid=BDF, sapi=0, ces=0, B-chan=2, calltype=VOICE
        CCB:callid=BE0, sapi=0, ces=0, B-chan=1, calltype=VOICE
        CCB:callid=BE1, sapi=0, ces=0, B-chan=3, calltype=VOICE
.
.
.
CCB:callid=BFA, sapi=0, ces=0, B-chan=31, calltype=VOICE
    The Free Channel Mask: 0xB0000000
    Total Allocated ISDN CCBs = 54
Total Allocated ISDN CCBs = 0
.
.
.
CCB:callid=89C8, sapi=0, ces=0, B-chan=14, calltype=VOICE
.
.
.
        CCB:callid=89D9, sapi=0, ces=0, B-chan=1, calltype=VOICE
        CCB:callid=89DA, sapi=0, ces=0, B-chan=2, calltype=VOICE
        CCB:callid=89DB, sapi=0, ces=0, B-chan=3, calltype=VOICE
    The Free Channel Mask: 0x80000018
ISDN Serial3/0:15 interface
        dsl 1, interface ISDN Switchtype = primary-qsig
         **** Master side configuration ****
    Layer 1 Status:
        ACTIVE
    Layer 2 Status:
        TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
        TEI = 0, Ces = 9, SAPI = 16, State = TEI_ASSIGNED
    Layer 3 Status:
        28 Active Layer 3 Call(s)
    Activated dsl 1 CCBs = 28
        CCB:callid=BDF, sapi=0, ces=0, B-chan=2, calltype=VOICE
        CCB:callid=BE0, sapi=0, ces=0, B-chan=1, calltype=VOICE
        CCB:callid=BE1, sapi=0, ces=0, B-chan=3, calltype=VOICE
.
.
.
CCB:callid=BFA, sapi=0, ces=0, B-chan=31, calltype=VOICE
    The Free Channel Mask: 0xB0000000
    Total Allocated ISDN CCBs = 54

The following shows sample output for a BRI voice port and a PRI voice port on a Cisco MC3810.

Router# show isdn status
Global ISDN Switchtype = basic-qsig
ISDN BRI1 interface
dsl 1, interface ISDN Switchtype = basic-qsig
**** Slave side configuration ****
    Layer 1 Status:
DEACTIVATED
    Layer 2 Status:
TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED
    Layer 3 Status:
NLCB:callid=0x0, callref=0x0, state=31, ces=0 event=0x0
0 Active Layer 3 Call(s)
    Activated dsl 1 CCBs = 0
ISDN BRI2 interface
.
.
.
Router# show isdn status
     Global ISDN Switchtype = primary-qsig
     ISDN Serial1:23 interface
             dsl 0, interface ISDN Switchtype = primary-qsig
              **** Slave side configuration ****
         Layer 1 Status:
             DEACTIVATED
         Layer 2 Status:
             TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED
         Layer 3 Status:
             0 Active Layer 3 Call(s)
         Activated dsl 0 CCBs = 0
         The Free Channel Mask: 0x7FFFFF

The following shows sample output for a PRI voice port on a Cisco 7200 series.

Router# show isdn status
Global ISDN Switchtype = primary-qsig
ISDN Serial1/0:15 interface
        dsl 0, interface ISDN Switchtype = primary-qsig
         **** Slave side configuration ****
    Layer 1 Status:
        DEACTIVATED
    Layer 2 Status:
        TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED
    Layer 3 Status:
        0 Active Layer 3 Call(s)
    Activated dsl 0 CCBs = 0
    The Free Channel Mask:  0x7FFF7FFF
ISDN Serial1/1:15 interface
        dsl 1, interface ISDN Switchtype = primary-qsig
         **** Slave side configuration ****
    Layer 1 Status:
        DEACTIVATED
    Layer 2 Status:
        TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED
    Layer 3 Status:
        0 Active Layer 3 Call(s)
    Activated dsl 1 CCBs = 0
    The Free Channel Mask:  0x7FFF7FFF
    Total Allocated ISDN CCBs = 0

Configuring ISDN PRI Q.931 Support

To configure ISDN PRI Q.931 support, perform the following steps.


Note
Use these commands on Cisco 2600 series and Cisco 3600 series only.
  • Set up each interface for either user side or network side.
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    isdn switch-type primary-net5

4.    controller {t1 | e1} slot/port

5.    pri-group timeslots range

6.    exit

7.    interface serial 0/0: channel-number

8.   Do one of the following:

  • isdn protocol-emulate user
  • isdn protocol-emulate network

9.    line-power

10.    isdn incoming-voice voice

11.    exit


DETAILED STEPS
 Command or ActionPurpose
Step 1
enable


Example:

Router> enable

 

Enters privileged EXEC mode. Enter your password when prompted.

 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters configuration mode.

 
Step 3
isdn switch-type primary-net5


Example:

Router(config)# isdn switch-type primary-net5

 

(Optional) Selects a service-provider switch type that accommodates PRI.

You can set the ISDN switch type in either global configuration mode or interface configuration mode.

  • Global configuration mode (this step): specify the switch type for all PRI ports.
  • Interface configuration mode: specify the switch type for a single interface. The type specified in this mode for any individual interface overrides the type specified in global configuration mode.
 
Step 4
controller {t1 | e1} slot/port


Example:

Router(config)# controller t1 1/1

 

Enters T1 or E1 controller configuration mode for the specified slot/port.

 
Step 5
pri-group timeslots range


Example:

Router(config-controller)# pri-group timeslots 1-23

 

Specifies PRI on the specified or timeslots that make up the PRI group. Maximum T1 range: 1-23. Maximum E1 range: 1-31. Separate low and high values with a hyphen.

Note    You can configure the PRI group to include all available timeslots, or you can configure a select group of timeslots for the PRI group.
 
Step 6
exit


Example:

Router(config-controller)# exit

 

Exits the current mode.

 
Step 7
interface serial 0/0: channel-number


Example:

Router(config)# interface serial 0/0:23

 

Enters interface configuration mode for the specified PRI slot/port and D-channel ISDN interface. D-channel ISDN interface is (for T1) 23 and (for E1) 15.

 
Step 8
Do one of the following:
  • isdn protocol-emulate user
  • isdn protocol-emulate network


Example:

Router(config-if)# isdn protocol-emulate user



Example:



Example:



Example:

Router(config-if)# isdn protocol-emulate network

 

(User side only) Configures Layer 2 and Layer 3 port mode emulation and clock status for the user--that is, the TE (clock slave).

or

(Network side only) Configures Layer 2 and Layer 3 port mode emulation and clock status for the network--that is, the NT (clock master).

 
Step 9
line-power


Example:

Router(config-if)# line-power

 

Turns on the power supplied from an NT-configured port to a TE device.

 
Step 10
isdn incoming-voice voice


Example:

Router(config-if)# isdn incoming-voice voice

 

Routes incoming ISDN voice calls to the voice module.

 
Step 11
exit


Example:

Router(config-if)# exit

 

Exits the current mode.

 

Configuration Examples for ISDN Voice Interfaces

ISDN-to-PBX and ISDN-to-PSTN Examples

This section contains the following configuration examples:

Configuration examples included in this section correspond to the topology shown in the figure below. The routers each include a BRI voice interface card and a two-slot voice network module, along with other voice interface cards and modules that are included for completeness. Router A is connected to a PBX through the BRI voice interface card and to Router B by a serial interface. Router B includes a BRI voice interface card for connection to the PSTN in order to process voice calls from off-premises terminal equipment. Router A is configured for ISDN BRI network-side emulation and Router B is configured for ISDN BRI user-side emulation.

Figure 1Configuration Example Topology


ISDN Connection to a PBX Configuration (Network-Side Emulation)

The following illustrates the configuration of the BRI interfaces on a Cisco 3640 (Router A in the figure above) connected to a PBX: 

interface BRI1/0
no ip address
isdn switch-type basic-net3
isdn overlap-receiving
isdn protocol-emulate network
isdn layer1-emulate network
isdn T306 30000
isdn sending-complete
isdn skipsend-idverify
isdn incoming-voice voice
!
interface BRI1/1
	no ip address
isdn switch-type basic-net3
isdn overlap-receiving
isdn protocol-emulate network
isdn layer1-emulate network
isdn T306 30000
isdn sending-complete
isdn skipsend-idverify
isdn incoming-voice voice
!
ip default-gateway 1.14.0.1
ip classless
ip route 2.0.0.0 255.0.0.0 Ethernet0/1
ip route 2.0.0.0 255.0.0.0 Serial0/1
ip route 172.22.66.33 255.255.255.255 Ethernet0/0
!
!
line con 0
 exec-timeout 0 0
 transport input none
line aux 0
line vty 0 4
 login

ISDN Connection to the PSTN Configuration (User-Side Emulation)

The following illustrates the configuration of the BRI interfaces on a Cisco 2600 series (Router B in the figure above) connected to the public ISDN telephone network: 

interface BRI1/0
no ip address
 no ip directed-broadcast
 isdn switch-type basic-ni1
 isdn twait-disable
 isdn spid1 14085552111 5552111
 isdn spid2 14085552112 5552112
 isdn incoming-voice voice
interface BRI1/1
 no ip address
 no ip directed-broadcast
 isdn switch-type basic-ni1
 isdn twait-disable
 isdn spid1 14085552111 5552111
 isdn spid2 14085552112 5552112
 isdn incoming-voice voice
!
ip classless
ip route 3.0.0.0 255.0.0.0 Ethernet0/1
ip route 3.0.0.0 255.0.0.0 Serial0/1
ip route 172.21.66.0 255.255.255.0 Ethernet0/0
!
line con 0
 exec-timeout 0 0
 transport input none
line aux 0
line vty 0 4
 login

QSIG Support Examples

The following show QSIG configurations on a variety of supported routers:

QSIG Support on Cisco 3600 Series Routers

The following shows how a Cisco 3660 series can be configured for E1 and PRI with QSIG signaling support using VoIP and VoATM. Note that Serial5/0, Serial5/1, Serial6/0, and Serial6/1 are configured as ISDN E1 PRI (user side).

.
.
.
hostname router3660
!
memory-size iomem 20
voice-card 5
!
voice-card 6
!
ip subnet-zero
!
isdn switch-type primary-qsig
isdn voice-call-failure 0
!
controller E1 5/0
 pri-group timeslots 1-5,16
!
controller E1 5/1
 pri-group timeslots 1-31
!
controller E1 6/0
 pri-group timeslots 1-31
!
controller E1 6/1
 pri-group timeslots 1-31
!
interface FastEthernet0/0
 ip address 10.7.72.9 255.255.255.0
 speed auto
 half-duplex
!
interface FastEthernet0/1
 ip address 10.100.100.7 255.255.255.0
 no keepalive
 duplex auto
 speed auto
 hold-queue 1000 in
!
interface Serial2/0
 no ip address
 shutdown
!
interface Serial2/1
 no ip address
 shutdown
!
interface Serial2/2
 no ip address
 shutdown
!
interface Serial2/3
 no ip address
 shutdown
!
interface ATM3/0
 no ip address
 atm clock INTERNAL
 no atm ilmi-keepalive
 pvc 10/40
  vbr-rt 155000 50000 64000
  encapsulation aal5mux voice
 !
interface Serial5/0:15
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 no cdp enable
!
interface Serial5/1:15
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn incoming-voice voice
 fair-queue 64 256 0
 no cdp enable
!
interface Serial6/0:15
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn incoming-voice voice
 fair-queue 64 256 0
 no cdp enable
!
interface Serial6/1:15
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn incoming-voice voice
 fair-queue 64 256 0
 no cdp enable
!
ip classless
ip route 192.168.17.125 255.255.255.255 FastEthernet0/0
no ip http server
!
map-class frame-relay frs0
 frame-relay voice bandwidth 1260000
 frame-relay fragment 200
 no frame-relay adaptive-shaping
 frame-relay cir 1260000
 frame-relay fair-queue
!
voice-port 1/0/0
 modem passthrough system
 timing hookflash-in 0
!
voice-port 1/0/1
 modem passthrough system
 timing hookflash-in 0
!
voice-port 5/0:15
 compand-type a-law
!
voice-port 5/1:15
 compand-type a-law
 cptone DE
!
voice-port 6/0:15
 compand-type a-law
 cptone DE
!
voice-port 6/1:15
 no echo-cancel enable
 compand-type a-law
 cptone DE
!
dial-peer voice 1 pots
 shutdown
 destination-pattern 21...
 modem passthrough system
 direct-inward-dial
!
dial-peer voice 51 voip
 shutdown
 destination-pattern 6504007
 modem passthrough system
 session target ipv4:100.100.100.3
!
dial-peer voice 2 pots
 shutdown
 destination-pattern 21...
 modem passthrough system
 direct-inward-dial
 port 5/1:15
!
dial-peer voice 3 voip
 shutdown
 destination-pattern 22...
 modem passthrough system
 session target ipv4:100.100.100.6
!
dial-peer voice 5 pots
 shutdown
 destination-pattern 22...
 modem passthrough system
 direct-inward-dial
 prefix 4006
!
dial-peer voice 13 pots
 shutdown
 destination-pattern 21...
 modem passthrough system
 direct-inward-dial
 port 6/0:15
!
dial-peer voice 6 pots
 destination-pattern 21...
 modem passthrough system
 direct-inward-dial
 port 6/1:15
!
dial-peer voice 44 voatm
 destination-pattern 22...
 modem passthrough system
 session target ATM3/0 pvc 10/40
!
dial-peer voice 20 pots
 incoming called-number 4...
 destination-pattern 4007
 modem passthrough system
 direct-inward-dial
 port 5/0:15
 prefix 4007
!
dial-peer voice 21 pots
 destination-pattern 4006
 modem passthrough system
 direct-inward-dial
 port 5/0:15
 prefix 4006
!
line con 0
 transport input none
line aux 0
line vty 0 4
 login
!
end

QSIG Support on Cisco 7200 Series Routers

The following shows how QSIG protocol support is configured with VoFR on Router A (where calls originate) and Router B (where calls terminate). Note that Serial3/0:15, Serial3/1:15, Serial4/0:15, and Serial4/1:15 are configured as ISDN E1 PRI (user side).

Router A: Originating Configuration

Router B: Terminating Configuration

 
.
.
.
hostname 7200_RouterA
!
card type e1 3
card type e1 4
!
dspint DSPfarm3/0
!
dspint DSPfarm4/0
!
ip subnet-zero
no ip domain-lookup
ip host routerC 192.168.17.125
ip host routerD 10.1.1.2
!
multilink virtual-template 1
frame-relay switching
isdn switch-type primary-qsig
isdn voice-call-failure 0
!
voice class codec 1
 codec preference 1 g711ulaw
 codec preference 3 g729br8
!
controller E1 3/0
 pri-group timeslots 1-31
 description qsig connected to PCG 1
!
controller E1 3/1
 pri-group timeslots 1-31
 description cas connected to PCG 2
!
controller E1 4/0
 pri-group timeslots 1-31
 description qsig group connected PCG slot3
!
controller E1 4/1
 pri-group timeslots 1-31
 description qsig group connected PCG slot4
!
!
!
!
!
 
.
.
.
hostname 7200_RouterB
!
card type e1 3
card type e1 4
!
dspint DSPfarm3/0
!
dspint DSPfarm4/0
!
ip subnet-zero
ip cef
no ip domain-lookup
ip host routerC 192.168.17.125
!
multilink virtual-template 1
isdn switch-type primary-qsig
isdn voice-call-failure 0
!
!
!
!
!
!
controller E1 3/0
 pri-group timeslots 1-31
 description qsig connected to PCG 5
!
controller E1 3/1
 pri-group timeslots 1-31
 description cas connected to PCG 6
!
controller E1 4/0
 pri-group timeslots 1-31
 description cas connected to PCG slot7
!
controller E1 4/1
 pri-group timeslots 1-31
 description cas connected to PCG slot8
!
interface Loopback0
 no ip address
 no ip directed-broadcast
!
 
interface FastEthernet0/0
 no ip address
 no ip directed-broadcast
 shutdown
 half-duplex
!
!
!
!
!
interface Serial1/0
 bandwidth 512
 ip address 10.1.1.104 255.255.255.0
 no ip directed-broadcast
 encapsulation ppp
 no ip route-cache
 no ip mroute-cache
 load-interval 30
 no keepalive
 shutdown
 no fair-queue
 clockrate 2015232
 ppp multilink
!
interface Serial1/1
 description vofr connection to 7200_RouterB_s1/1
 ip address 10.0.0.2 255.0.0.0
 ip broadcast-address 10.0.0.0
 no ip directed-broadcast
 encapsulation frame-relay
 no ip route-cache
 no ip mroute-cache
 no keepalive
 frame-relay traffic-shaping
 frame-relay map ip 10.0.0.1 100 broadcast
 frame-relay interface-dlci 100
  class vofr_class
  vofr data 4 call-control 5
!
interface Serial1/2
 no ip address
 no ip directed-broadcast
 no ip route-cache
 no ip mroute-cache
 shutdown
!
interface Serial1/3
 no ip address
 no ip directed-broadcast
 no ip route-cache
 no ip mroute-cache
 shutdown
 clockrate 2015232
!
 
interface FastEthernet0/0
 description VOIP_10.0.0.1_maxstress to 7200_RouterAgate
 ip address 10.0.0.1 255.0.0.0
 no ip directed-broadcast
 no ip mroute-cache
 shutdown
 media-type MII
 full-duplex
!
interface Serial1/0
 no ip address
 no ip directed-broadcast
 no ip mroute-cache
 shutdown
!
!
!
!
!
!
!
!
!
interface Serial1/1
 description vofr connection to 7200_RouterA
 ip address 10.0.0.1 255.0.0.0
 ip broadcast-address 10.0.0.0
 no ip directed-broadcast
 encapsulation frame-relay
 no keepalive
 clockrate 8060928
 frame-relay traffic-shaping
 frame-relay map ip 10.0.0.2 100 broadcast
 frame-relay interface-dlci 100
  class vofr_class
  vofr data 4 call-control 5
!
!
interface Serial1/2
 no ip address
 no ip directed-broadcast
 shutdown
 clockrate 2015232
!
!
interface Serial1/3
 no ip address
 no ip directed-broadcast
 shutdown
!
!
!
!
 
interface Ethernet2/0
 ip address 10.1.50.77 255.255.0.0
 ip broadcast-address 10.1.0.0
 no ip directed-broadcast
 no ip route-cache
 no ip mroute-cache
!
interface Ethernet2/1
 ip address 10.0.0.2 255.255.0.0
 ip broadcast-address 10.0.0.0
 no ip directed-broadcast
 no ip route-cache
 no ip mroute-cache
 shutdown
!
interface Ethernet2/2
 no ip address
 no ip directed-broadcast
 no ip route-cache
 no ip mroute-cache
 shutdown
!
interface Ethernet2/3
 no ip address
 no ip directed-broadcast
 no ip route-cache
 no ip mroute-cache
 shutdown
!
interface Serial3/0:15
 no ip address
 no ip directed-broadcast
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 isdn bchan-number-order ascending
 no cdp enable
!
!
!
interface Serial3/1:15
 no ip address
 no ip directed-broadcast
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 isdn bchan-number-order ascending
 no cdp enable
!
!
!
 
interface Ethernet2/0
 ip address 10.5.192.123 255.255.0.0
 ip helper-address 192.168.17.125
 no ip directed-broadcast
 no ip mroute-cache
!
!
interface Ethernet2/1
 ip address 10.0.0.1 255.255.0.0
 no ip directed-broadcast
 no ip mroute-cache
 shutdown
!
!
!
interface Ethernet2/2
 no ip address
 no ip directed-broadcast
 shutdown
!
!
!
interface Ethernet2/3
 no ip address
 no ip directed-broadcast
 shutdown
!
!
!
interface Serial3/0:15
 no ip address
 no ip directed-broadcast
 no ip route-cache cef
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 isdn bchan-number-order ascending
 no cdp enable
!
interface Serial3/1:15
 no ip address
 no ip directed-broadcast
 no ip route-cache cef
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 isdn bchan-number-order ascending
 no cdp enable
!
 
interface Serial4/0:15
 no ip address
 no ip directed-broadcast
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 isdn bchan-number-order ascending
 no cdp enable
!
!
!
interface Serial4/1:15
 no ip address
 no ip directed-broadcast
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 isdn bchan-number-order ascending
 no cdp enable
!
!
!
interface ATM5/0
 no ip address
 no ip directed-broadcast
 no ip route-cache
 no ip mroute-cache
 shutdown
 no atm ilmi-keepalive
!
!
!
!
!
interface Virtual-Template1
 ip address 10.0.0.2 255.255.255.0
 no ip directed-broadcast
 load-interval 30
 fair-queue 64 256 1
 ppp multilink
 ppp multilink fragment-delay 20
 ppp multilink interleave
 ip rtp priority 16384 16383 92
!
router igrp 144
 network 10.0.0.0
!
ip default-gateway 10.21.75.10
ip classless
no ip http server
!
 
interface Serial4/0:15
 no ip address
 no ip directed-broadcast
 no ip route-cache cef
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 isdn bchan-number-order ascending
 no cdp enable
!
interface Serial4/1:15
 no ip address
 no ip directed-broadcast
 no ip route-cache cef
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 isdn bchan-number-order ascending
 no cdp enable
!
interface ATM5/0
 no ip address
 no ip directed-broadcast
 shutdown
 no atm ilmi-keepalive
!
interface FastEthernet6/0
 no ip address
 no ip directed-broadcast
 shutdown
 half-duplex
!
interface Virtual-Template1
 ip unnumbered Loopback0
 no ip directed-broadcast
 no ip route-cache cef
 ip mroute-cache
 ppp multilink
 ppp multilink fragment-delay 20
 ppp multilink interleave
!
!
router igrp 144
 network 10.0.0.0
!
!
ip classless
no ip http server
!
 
map-class frame-relay vofr_class
 no frame-relay adaptive-shaping
 frame-relay cir 4400000
 frame-relay bc 1000
 frame-relay fair-queue
 frame-relay voice bandwidth 4000000
 frame-relay fragment 256
!
voice-port 3/0:15
 compand-type a-law
 cptone DE
!
voice-port 3/1:15
 compand-type a-law
 cptone DE
!
voice-port 4/0:15
 compand-type a-law
 cptone DE
!
voice-port 4/1:15
 compand-type a-law
 cptone DE
!
dial-peer voice 5552222 pots
 destination-pattern +5552...
 direct-inward-dial
 port 3/1:15
 prefix 5552
!
dial-peer voice 5551111 vofr
 destination-pattern +6......
 sequence-numbers
 session target Serial1/1 100
 codec g729br8
!
dial-peer voice 5554 pots
 destination-pattern 5554...
 direct-inward-dial
 port 4/1:15
 prefix 5554
!
dial-peer voice 5553 pots
 destination-pattern 5553...
 direct-inward-dial
 port 4/0:15
 prefix 5553
!
dial-peer voice 5551 pots
 destination-pattern +5551...
 direct-inward-dial
 port 3/0:15
 prefix 5551
.
.
.
 
map-class frame-relay vofr_class
 no frame-relay adaptive-shaping
 frame-relay cir 4400000
 frame-relay bc 1000
 frame-relay fair-queue
 frame-relay voice bandwidth 4000000
 frame-relay fragment 256
!
voice-port 3/0:15
 compand-type a-law
!
!
voice-port 3/1:15
 compand-type a-law
!
!
voice-port 4/0:15
 compand-type a-law
!
!
voice-port 4/1:15
 compand-type a-law
!
!
dial-peer voice 5552222 pots
 destination-pattern +6662...
 direct-inward-dial
 port 3/1:15
 prefix 6662
!
dial-peer voice 5551111 vofr
 destination-pattern +5......
 sequence-numbers
 session target Serial1/1 100
 codec g729br8
!
dial-peer voice 6661 pots
 destination-pattern +6661...
 direct-inward-dial
 port 3/0:15
 prefix 6661
!
dial-peer voice 6663 pots
 destination-pattern +6663...
 direct-inward-dial
 port 4/0:15
 prefix 6663
!
dial-peer voice 6664 pots
 destination-pattern +6664...
 direct-inward-dial
 port 4/1:15
 prefix 6664
.
.
.

QSIG Support on Cisco MC3810 Multiservice Concentrators

The following shows how a Cisco MC3810 can be configured for E1 and PRI with QSIG signaling support and VoIP and VoFR. Note that Serial1:15 is configured as ISDN E1 PRI (user side).

.
.
.
hostname Router3810
!
network-clock base-rate 56k
ip subnet-zero
!
isdn switch-type primary-qsig
isdn voice-call-failure 0
!
controller T1 0
 mode atm
 framing esf
 clock source internal
 linecode b8zs
!
controller E1 1
 pri-group timeslots 1-7,16
!
interface Ethernet0
 ip address 100.100.100.6 255.255.255.0
 no ip directed-broadcast
!
interface Serial0
 bandwidth 2000
 ip address 10.168.14.1 255.255.255.0
 no ip directed-broadcast
 encapsulation frame-relay
 no ip mroute-cache
 no keepalive
 clockrate 2000000
 cdp enable
 frame-relay traffic-shaping
 frame-relay interface-dlci 100
  class frs0
  vofr cisco
!
interface Serial1
 no ip address
 no ip directed-broadcast
 shutdown
!
interface Serial1:15
 no ip address
 no ip directed-broadcast
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 fair-queue 64 256 0
 no cdp enable
!
interface ATM0
 no ip address
 no ip directed-broadcast
 ip mroute-cache
 no atm ilmi-keepalive
 pvc 10/42
  encapsulation aal5mux voice
 !
!
interface FR-ATM20
 no ip address
 no ip directed-broadcast
 shutdown
!
no ip http server
ip classless
ip route 223.255.254.0 255.255.255.0 Ethernet0
!
map-class frame-relay frs0
 frame-relay voice bandwidth 1260000
 frame-relay fragment 200
 no frame-relay adaptive-shaping
 frame-relay cir 1260000
 frame-relay fair-queue
!
map-class frame-relay frsisco
!
voice-port 1:15
 compand-type a-law
!
dial-peer voice 100 voatm
 shutdown
 destination-pattern 4...
 session target ATM0 pvc 10/42
 codec g729ar8
 no vad
!
dial-peer voice 1 pots
 shutdown
 destination-pattern 3001
!
dial-peer voice 42 vofr
 destination-pattern 4006
 session target Serial0 100
 signal-type ext-signal
!
dial-peer voice 21 pots
 destination-pattern 4007
 direct-inward-dial
 port 1:15
 prefix 4007
!
dial-peer voice 12 voip
 shutdown
 destination-pattern 4006
 session target ipv4:100.100.100.7
.
.
.

Q.931-Support Example

The following shows how a Cisco 3660 can be configured for E1 and PRI with network-side support using VoIP. Note that Serial5/0:15 and Serial6/0:15 are configured as ISDN E1 PRI (network side) and that Serial5/1:15 and Serial6/1:15 are configured as ISDN E1 PRI (user side).

.
.
.
hostname router3660
!
memory-size iomem 20
voice-card 5
!
voice-card 6
!
ip subnet-zero
!
isdn switch-type primary-net5
isdn voice-call-failure 0
!
controller E1 3/0
 pri-group timeslots 1-5,16
!
controller E1 3/1
 pri-group timeslots 1-31
!
controller E1 4/0
 pri-group timeslots 1-31
!
controller E1 4/1
 pri-group timeslots 1-31
!
interface FastEthernet0/0
 ip address 10.7.72.9 255.255.255.0
 speed auto
 half-duplex
!
interface FastEthernet0/1
 ip address 10.100.100.7 255.255.255.0
 no keepalive
 duplex auto
 speed auto
 hold-queue 1000 in
!
interface Serial2/0
 no ip address
 shutdown
!
interface Serial2/1
 no ip address
 shutdown
!
interface Serial2/2
 no ip address
 shutdown
!
interface Serial2/3
 no ip address
 shutdown
!
interface Serial5/0:15
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice
 isdn protocol-emulate network
 no cdp enable
!
interface Serial5/1:15
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn incoming-voice voice
 fair-queue 64 256 0
 no cdp enable
!
interface Serial6/0:15
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn incoming-voice voice
 fair-queue 64 256 0
 isdn protocol-emulate network
 no cdp enable
!
interface Serial6/1:15
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn incoming-voice voice
 fair-queue 64 256 0
 no cdp enable
!
ip classless
ip route 223.255.254.254 255.255.255.255 FastEthernet0/0
no ip http server
!
voice-port 1/0/0
timing hookflash-in 0
!
voice-port 1/0/1
	timing hookflash-in 0
!
voice-port 5/0:15
 compand-type a-law
!
voice-port 5/1:15
 compand-type a-law
 cptone DE
!
voice-port 6/0:15
 compand-type a-law
 cptone DE
!
voice-port 6/1:15
 no echo-cancel enable
 compand-type a-law
 cptone DE
!
dial-peer voice 1 pots
 shutdown
 destination-pattern 21...
direct-inward-dial
!
dial-peer voice 51 voip
 shutdown
 destination-pattern 6504007
session target ipv4:100.100.100.3
!
dial-peer voice 2 pots
 shutdown
 destination-pattern 21...
direct-inward-dial
 port 5/1:15
!
dial-peer voice 3 voip
 shutdown
 destination-pattern 22...
session target ipv4:100.100.100.6
!
dial-peer voice 5 pots
 shutdown
 destination-pattern 22...
 modem passthrough system
 direct-inward-dial
 prefix 4006
!
dial-peer voice 13 pots
 shutdown
 destination-pattern 21...
direct-inward-dial
 port 6/0:15
!
dial-peer voice 6 pots
 destination-pattern 21...
direct-inward-dial
 port 6/1:15
!
dial-peer voice 20 pots
 incoming called-number 4...
 destination-pattern 4007
direct-inward-dial
 port 5/0:15
 prefix 4007
!
dial-peer voice 21 pots
 destination-pattern 4006
direct-inward-dial
 port 5/0:15
 prefix 4006
!
line con 0
 transport input none
line aux 0
line vty 0 4
 login
!
end

Additional References

General ISDN References

  • "Overview of ISDN Voice Interfaces" on page 3 --Describes relevant underlying technology; lists related documents, standards, MIBs, and RFCs; and describes how to obtain technical assistance
  • Additional References--Lists additional ISDN references

References Mentioned in This Chapter

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