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Table of Contents

PRI and BRI QSIG Protocol Support on
Cisco 2600, 3600, and MC3810 Series Routers and PRI QSIG on the Cisco 7200

PRI and BRI QSIG Protocol Support on
Cisco 2600, 3600, and MC3810 Series Routers and PRI QSIG on the Cisco 7200

This document describes how to configure QSIG protocol support for Cisco 7200, 2600, and 3600 series routers and enhancements to QSIG protocol support on the Cisco MC3810 multiservice access concentrator.

This feature description includes the following sections:

Feature Overview

QSIG protocol support allows Cisco voice switching services to connect private branch exchanges (PBXs), key systems (KTs), and central office switches (COs) that communicate by using the QSIG protocol, which is becoming the standard for PBX interoperability in Europe and North America. QSIG is a variant of ISDN D-channel signaling. With QSIG, Cisco networks emulate the functionality of the public-switched telephone network (PSTN), and QSIG signaling messages allow the dynamic establishment of voice connections across a Cisco wide-area network (WAN) to a peer router, which can then transport the signaling and voice packets to a second private integrated services network exchange (PINX), as shown in Figure 1.


Figure 1: QSIG Signaling

The Cisco voice packet network appears to the traditional QSIG PBXs as a distributed transit PBX that can establish calls to any PBX, non-QSIG PBX, or other telephony endpoint served by a Cisco gateway, including non-QSIG endpoints. When originating and terminating on QSIG endpoints, the QSIG messages are passed transparently across the network; the PBXs are responsible for processing and provisioning the supplementary services. When linking QSIG and non-QSIG endpoints served by a Cisco packet voice gateway, only basic calls are supported. In addition, all switched voice connections must be established and torn down in response to QSIG control messages.

QSIG support includes the following capabilities:

Figure 2 shows an example of how QSIG support can enable a toll-bypass application.


Figure 2: QSIG Toll-Bypass Application


QSIG Protocol Stack

QSIG is a variant of ISDN D-channel signaling. The protocol was originally specified by ECMA, then was adopted by European Telecommunications Standards Institute (ETSI) and the ISO. Table 1 identifies the ECMA standards and the OSI layer of the QSIG protocol stack to which they relate.


Table 1: QSIG Protocol Stack
Layer Standards Description
Layers 4 to 7

Application mechanisms

End-to-end protocols

Network transparent

Layer 3

Multiple ECMA standards

Standards for Supplementary Services and Advance Network Features

ECMA-165

QSIG Generic Functional Procedures

ECMA-142/143

QSIG Basic Call

Layer 2

ECMA-141

Interface-dependent protocols

Layer 1

I.430 / I.431

PRI and BRI

Switch-Type Configuration Options

Step-by-step configuration procedures are included in "Configuration Tasks". This section includes some tips for configuring the ISDN switch type.

You can enter the isdn switch-type command to support QSIG at either the global configuration level or at the interface configuration level. For example, if you have a QSIG connection on one line as well as on the BRI or PRI port, you can configure the ISDN switch type in one of the following combinations:


Table 2: ISDN CO Switch Types
Country ISDN Switch Type Description

Australia

basic-ts013

Australian TS013 switches

Europe

basic-1tr6

German 1TR6 ISDN switches

basic-nwnet3

Norwegian NET3 ISDN switches (phase 1)

basic-net3

NET3 ISDN switches (UK and others)

vn2

French VN2 ISDN switches

vn3

French VN3 ISDN switches

Japan

ntt

Japanese NTT ISDN switches

New Zealand

basic-nznet3

New Zealand NET3 switches

North America

basic-5ess

Lucent Technologies basic rate switches

basic-dms100

NT DMS-100 basic rate switches

basic-ni1

National ISDN-1 switches

Benefits

QSIG voice signaling provides the following benefits:

Restrictions

The following restrictions apply to the Cisco MC3810:

The Cisco 2600 series does not support VoATM.

The following restrictions apply to the Cisco 7200 series:

Related Documents

The following Cisco IOS Release 12.1 documents can help you understand QSIG support:

The following Cisco IOS Release 12.1 documents are also helpful:

The following documents can help you troubleshoot ISDN, PRI, and BRI connections:

The following sites contain hardware installation and configuration guides, as well as regulatory and safety information for the products covered by this feature:

Additional platform-specific documents can be helpful:

Supported Platforms

This feature is supported on the following platforms:

Supported Standards, MIBs, and RFCs

Standards

QSIG is based on the widely used ISDN Q.931 standards. Cisco's QSIG implementation follows the following International standards:

MIBs

RFCs

Prerequisites

Configuration Tasks

Perform the following tasks to configure your Cisco 2600, 3600, or 7200 VXR series routers or your Cisco MC3810 multiservice concentrator:

These sections do not include all possible configuration steps. For more information, see the resources listed in "Related Documents".

Configuring Global QSIG Support for BRI or PRI

To complete global configuration of QSIG signaling on the router, follow the steps in this section.

If you need additional guidance regarding switch-type configuration, see "Switch-Type Configuration Options".

Command Purpose

Step 1  

router# configure terminal

Enter global configuration mode.

Step 2  

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

or

isdn switch-type primary-qsig

Optional.

(BRI only on Cisco MC3810, 2600, and 3600 series routers) Configure the global ISDN switch type.

(PRI only) Configure the ISDN switch-type to support QSIG signaling.

Note   You can configure the ISDN switch type by using either this global command or the same command in interface configuration mode, depending on your configuration. If you configure the global isdn switch-type command for QSIG support, you do not need to configure the interface isdn switch-type command for QSIG.

For more information, see "Switch-Type Configuration Options". For a list of CO switch types, see Table 2.

Step 3  

router(config)# dspinterface dspfarm slot/port

(Cisco 7200 series only) Configure the digital signal processor (DSP) farm interface.

Step 4  

router(config)# card type {t1/e1} slot

(Cisco 7200 series only) Enter T1 or E1 card type and specify the slot location by using a value from 0 to 5, depending on your router.

Configuring Controllers for QSIG PRI

Beginning in global configuration mode, complete the following steps to configure QSIG signaling over PRI:

Command Purpose

Step 1  

router(config)# controller {T1|E1} 
controller_number

Enter interface configuration mode and specify the E1 or T1 controller, specifying 1 for a CiscoMC3810 and a slot/port location on a Cisco7200, 2600, or 3600 series router.

Note   On the Cisco MC3810, QSIG is only supported on controller 1.

Step 2  

router(config-controller)# pri-group {timeslots 
range}

Configure the PRI group for either T1 or E1 to carry voice traffic. For T1, available time slots are from 1 to 23, and for E1, available time slots are from 1 to 31.

You can configure the PRI group to include all available time slots, or you can configure a select group of time slots for the PRI group. For example, if only time slots 1 to 10 are in the PRI group, enter pri-group timeslot 1-10.

If the PRI group includes all channels available for T1 (channels 1 to 24), enter pri-group timeslot 1-24.

If the PRI group includes all channels available for E1 (channels 1 to 31), enter pri-group timeslot 1-31.

Step 3  

router(config-controller)# exit

Exit controller configuration mode.

Configuring BRI or PRI Interfaces for QSIG

To configure BRI or PRI interfaces for QSIG support, complete the following steps, beginning in global configuration mode:

Command Purpose

Step 1  

router(config)# interface bri slot


 or


router(config)# interface bri slot/port


 (BRI only on Cisco MC3810, 2600, and 3600 series routers) Enter interface configuration mode to configure parameters for the specified BRI voice interface. 


 (Cisco MC3810) Enter a slot number from 1 to 4.


 (Cisco 2600 or 3600 series router) Enter a slot number from 1 to 6 and a port value of 1 or 2.





Step 2  


router(config)# isdn static tei 0


 (BRI only on Cisco MC3810, 2600, and 3600 series routers) This command is required. In previous releases, it was set automatically when the isdn switch-type basic-qsig command was issued.





Step 3  


router(config-if)# isdn layer1-emulate {user | 
network}

 (BRI only, Cisco MC3810 only) Configure the Layer 1 port mode emulation and the clock settings:


  • Enter user to configure the port as TE and to function as a clock slave. This is the default. The term user is equivalent to the QSIG term slave.
    

  • Enter network to configure the port as NT and to function as a clock master. The term network is equivalent to the QSIG term master.
    






Step 4  


router(config-if)# network-clock-priority {low | 
high}

 (BRI only, Cisco MC3810 only) If this BRI voice port is configured as TE and you want it to be the first-priority BRI voice port for recovering clock from the network NT device, enter high. 


 If this BRI voice port is configured as TE and you want it to be a low-priority BRI voice port for recovering clock from the network NT device, enter low. 


 Do not use this command if this port is configured as NT in Step 3 with the command isdn layer1-emulate network.





Step 5  


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


 Route incoming voice calls. This is set for voice-capable BRI interfaces by default, except for Cisco 2600 and 3600 series BRI S/T TE voice interface cards, where, unless this command is used, the isdn incoming-voice modem configuration setting is converted to isdn incoming-voice voice when it receives an incoming call.





Step 6  


router(config-if)# isdn sending-complete


 (Optional) Configure 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 7  


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


 (Optional, BRI only on Cisco MC3810, 2600, and 3600 series routers, see "Switch-Type Configuration Options") If the service provider switch type for this BRI port is different from the global ISDN switch type, configure 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.


 Continue BRI interface configuration at Step 4 of the following procedure.





Step 8  


router(config-if)# exit


 (PRI only) Exit interface configuration mode. 














 If you are configuring a BRI interface, begin at Step 4. If you are configuring a PRI interface, begin at Step 1.


  




Command
Purpose




Step 1  


router(config)# interface serial 
slot/port:channelnumber


 or


interface serial 1:channelnumber


 (PRI only) Enter interface configuration mode for the ISDN PRI interface and the interface slot and port location. 


 On a Cisco MC3810, enter the slot location as 1.


 On any supported router, for T1, enter the channel number as 23. For E1, enter 15.





Step 2  


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


 (PRI only, see "Switch-Type Configuration Options") If you did not configure the global PRI ISDN switch type for QSIG support in global configuration mode, configure the interface ISDN switch type to support QSIG signaling.


 The conditions that apply to this command in global configuration mode also apply to this command in interface configuration mode.







Note   This interface command overrides the global isdn switch-type command setting for this interface.




 





Step 3  


router(config-if)# isdn contiguous-bchan


 (PRI only, E1 only) Specify contiguous bearer channel handling so that B channels 1 through 30 map to time slots 1 to 31, skipping 16.


 





Step 4  


router(config-if)# isdn protocol-emulate {user | 
network}

 Configure the Layer 2 and Layer 3 port protocol emulation:


  • Enter user (equivalent to the QSIG term slave) to configure the port as TE; the PINX is the master. This is the default.
    

  • Enter network (equivalent to the QSIG term master) to configure the port as NT; the PINX is the slave.
    








Note   On the Cisco MC3810, this command replaces the command isdn switch-type [primary-qsig-slave | primary-qsig-master].




 





Step 5  


router(config-if)# isdn overlap-receiving value 

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







Note   You can leave the default mode of enbloc, where all call establishment information is sent in the setup message without need for additional messages from the preceding PINX.




 





Step 6  


router(config-if)# isdn network-failure-cause value


 (Optional) Specify the cause code to pass to the PBX when a call cannot be placed or completed because of internal network failures. Possible values range from 1 to 127. See Table 3 in the Command Reference section for a list of cause codes.





Step 7  


router(config-if)# exit


 Exit interface configuration mode.














 Verifying the QSIG Configuration


 Perform the following steps to confirm the QSIG configuration. The show running-config command displays PRI time slot group configuration and other details, as shown in "Configuration Examples".



Step 1	  To see information about switch type, memory, status, and Layer 2 and Layer 3 timers, enter the show isdn {memory | status | timers} command.


 For more information about this command, see the Cisco IOS Release 12.1 Dial Services Command Reference, http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/dial_r/index.htm.
  

 The following sample output shows the results of the show isdn status command for a BRI voice port and a PRI voice port on the 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 sample output shows the results of the show isdn status command for a BRI voice port on a Cisco 3600 series router:


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 sample output shows the results of the show isdn status command for a PRI voice port on a Cisco 7200 VXR series router:


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
 


Step 2	  To display the state and the service status of each ISDN channel, enter the show isdn service privileged EXEC command. 


 The following example shows sample output from the show isdn service command when PRI is configured 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 
 


Step 3	  To display the Call Distributor Application Programming Interface (CDAPI) information, use the show cdapi command.


 The following sample output shows the results of the show cdapi command PRI on a the Cisco 3660 series router:


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 sample output shows the results of the show cdapi command for a PRI voice port on the Cisco MC3810:


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
 

 Troubleshooting Tips


 The table below lists debug and show commands that can help you analyze problems with your configuration. "Related Documents" lists documentation that includes information about these commands.


  



Command
Purpose



router# show isdn status


 Shows the status of all ISDN interfaces, including active layers, timer information, and switch type settings.




router# show controller t1/e1


 Shows information about T1 and E1 controllers.




router# show voice port summary


 Shows summary information about voice-port configuration.




router# show dial-peer voice


 Shows how voice dial peers are configured.




router# show cdapi


 Shows the Call Distributor Application Programming Interface (CDAPI) information.




router# show call history voice record


 Shows information about calls made to and from the router.




router# show rawmsg


 Shows information about any memory leaks.




router# debug isdn event


 Shows events occurring on the user side (on the router) of the ISDN interface. The ISDN events that can be displayed are Q.931 events (call setup and teardown of ISDN network connections).




router# debug tsp


 Shows information about the telephony service provider (TSP).




router# debug cdapi { events | detail }

 Shows information about CDAPI application events, registration, messages, and so on.














 Configuration Examples

 
 The following configuration examples shows QSIG configuration on several supported routers:








Note   IP addresses in these examples are fictitious.




 QSIG Support on Cisco 7200 VXR Series Routers


 The following example configurations show how QSIG protocol support is configured with VoFR on Router A, where calls are originated, and Router B, where calls terminate.


  




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
!
interface FastEthernet0/0
 no ip address
 no ip directed-broadcast
 shutdown
 half-duplex
!
 

.
.
.
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
 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
 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 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 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 10.5.192.123 255.255.0.0
 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
 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 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 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 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 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
!
!
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
!

!
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 +5......
 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
.
.
.

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 +5552...
 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 3600 Series Routers


 The example below shows how a Cisco 3660 series router can be configured for E1 and PRI with QSIG signaling support using VoIP and VoATM.


.
.
.
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 the Cisco MC3810


 The example below shows how a Cisco MC3810 can be configured for E1 and PRI with QSIG signaling support and VoIP and VoFR.


.
.
.
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
.
.
.

 Command Reference

 
 This section describes new and modified commands for use with QSIG protocol support. All other commands used with this feature are documented in the Cisco IOS Release 12.1 command reference publications and online feature documentation. See "Related Documents". 



 isdn contiguous-bchan

 
 To configure contiguous bearer channel handling on an E1 Primary Rate Interface (PRI) interface, use the isdn contiguous-bchan interface configuration command. To disable the contiguous B channel handling, use the no form of this command.

isdn contiguous-bchan


no isdn contiguous-bchan




Syntax Description 

 This command has no arguments or keywords.



Defaults 

 By default, contiguous B channel handling is off.



Command Modes 

 Interface configuration



Command History  




Release 
Modification



 12.0(7)XK


 This command was introduced.




 12.1(2)T


 This command was implemented in the 12.1(2)T release.














Usage Guidelines 

 Use the isdn contiguous-bchan command to specify contiguous bearer channel handling so that B channels 1 through 30, skipping 16, map to time slots 1 through 31. This is available for E1 PRI interfaces only, when the primary-qsig switch type option is configured by using the isdn switch-type command.



Examples 

 The following example shows the command configuration on a Cisco 3660 series router E1 interface:


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 continguous-bchan



Related Commands  




Command
Description



 isdn switch-type primary-qsig 


 In global or interface configuration mode, configures the primary-qsig switch type for PRI support.













 isdn global-disconnect

 
 To allow passage of "release" and "release complete" messages over the voice network, use the isdn global-disconnect command. To disable the passage of these messages, use the no form of this command.

isdn global-disconnect


no isdn global-disconnect




Syntax Description 

 This command has no arguments or keywords.



Defaults 

 Passage of messages is disabled by default; "release" and "release complete" will terminate locally by default.



Command Modes 

 Interface configuration



Command History  




Release 
Modification



 12.1(2)T


 This command was introduced.














Usage Guidelines 

 Enter this command under the isdn interface with switch type bri-qsig or pri-qsig. Use isdn global-disconnect to allow passage of "release" and "release complete" messages end-to-end across the network. This is required for certain types of QSIG PBXs whose software or features require either Facility or User Info IEs in those messages to be passed end-to-end between the PBXs. All QSIG interfaces connecting the PBXs to the routers must have this command enabled. This command is available when using BRI QSIG or PRI QSIG switch type in either master or slave mode.



Examples 

 The following example shows command configuration on a Cisco 3660 series router T1 PRI interface:


interface Serial5/0:23
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn global-disconnect
 isdn overlap-receiving
 isdn incoming-voice voice


Related Commands  




Command
Description



 isdn protocol-emulate


 Configures the interface to serve as either the QSIG slave or the QSIG master.




 isdn switch-type 


 In global or interface configuration mode, configures the switch type for BRI or PRI support.













 isdn incoming-voice

 
 To route all incoming voice calls as voice calls, to route them the modem and treat them as analog data, or to ensure that calls bypass the modems and are treated as digital data, use the isdn incoming-voice interface configuration command. Use the no form of this command to disable the setting. 

isdn incoming-voice {data [56 | 64] | modem [56 | 64] | voice}


no isdn incoming-voice {data [56 | 64] | modem [56 | 64] | voice} 




Syntax Description  




 data


 Specifies that incoming voice calls bypass the modems and are handled as digital data.




 modem


 Specifies that incoming voice calls are passed over to the digital modems, where they negotiate the appropriate modem connection with the far-end modem. 




 voice


 Specifies that incoming voice calls are treated as voice calls rather than being routed to the modem or handled as digital data. 




 56


 Specifies that the bandwidth for this connection is 56 kbps.




 64


 Specifies that the bandwidth for this connection is 64 kbps. If no argument is entered for either the data or modem keywords, the default value is 64.














Defaults 

 When a PRI or BRI interface is created, isdn incoming-voice voice is the default, except on a Cisco 2600 or 3600 series BRI S/T TE interface. In this case, if the command is not specified, the default isdn incoming-voice modem configuration setting is converted to isdn incoming-voice voice when the interface receives an incoming call.



Command Modes 

 Interface configuration



Command History  




Release 
Modification



 11.1


 This command was introduced.




 12.0(2)XC


 This command was made available for BRI interfaces.




 12.0(3)T


 This command was implemented in the 12.0(3)T release.




 12.0(7)XK


 This command was modified to include the voice keyword.




 12.1(2)T


 The modified command was implemented in the 12.1(2)T release.














Usage Guidelines 

 Unless you specify otherwise, all calls received by the router and characterized as voice calls are treated as such and not handled as digital data or not passed over to the modem. 


 On a Cisco 2600 or 3600 series router BRI S/T TE interface where the isdn incoming-voice command is not specified, the default isdn incoming-voice modem configuration setting is converted to isdn incoming-voice voice when the interface receives an incoming call.


 To establish speedier connections for analog calls to the router, use the isdn incoming-voice command with the modem keyword to have voice calls routed through digital modems (as pulse-code modulated analog data) instead of being treated as digital data.



Examples 

 The following example shows the command configuration on a Cisco 3660 series router T1 PRI interface:


interface Serial5/0:23
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn incoming-voice voice

 

 isdn network-failure-cause

 
 To specify the cause code to pass to the PBX when a call cannot be placed or completed because of internal network failures, use the isdn network-failure-cause interface command. To unconfigure use of this cause code, use the no form of this command.

isdn network-failure-cause value


no isdn network-failure-cause value




Syntax Description  




 value


 Number from 1 to 127. See Table 3 for a list of failure cause code values.














Defaults 

 No default.



Command Modes 

 Interface configuration



Command History  




Release 
Modification



 12.1(2)T


 This command was implemented in the 12.1(2)T release.














Usage Guidelines 

 The PBX can re-route calls based on cause code returned by the router.


 This command allows the original cause to be changed to the value specified if the original cause code is not one of the following: NORMAL_CLEARING (16), USER_BUSY (17), NO_USER_RESPONDING (18), NO_USER_ANSWER (19), NUMBER_CHANGED (22), INVALID_NUMBER_FORMAT (28), UNSPECIFIED_CAUSE (31), UNASSIGNED_NUMBER (1).


  

Table 3: ISDN Failure Cause Codes 




Failure Cause Code
Meaning



 1


 Unallocated or unassigned number




 2


 No route to specified transit network




 3


 No route to destination




 6


 Channel unacceptable




 7


 Call awarded and being delivered in an established channel




 16


 Normal call clearing




 17


 User busy




 18


 No user responding




 19


 No answer from user (user alerted)




 21


 Call rejected




 22


 Number changed




 26


 Non-selected user clearing




 27


 Destination out of order




 28


 Invalid number format




 29


 Facility rejected




 30


 Response to status enquiry




 31


 Normal, unspecified




 34


 No circuit/channel available




 38


 Network out of order




 41


 Temporary failure




 42


 Switch congestion




 43


 Access information discarded




 44


 Requested channel not available




 45


 Preempted




 47


 Resources unavailable, unspecified




 49


 Quality of service unavailable




 50


 Requested facility not subscribed




 52


 Outgoing calls barred




 54


 Incoming calls barred




 57


 Bearer capability not authorized




 58


 Bearer capability not now available




 63


 Service or option not available, unspecified




 65


 Bearer capability not implemented




 66


 Channel type not implemented




 69


 Requested facility not implemented




 70


 Only restricted digital information bearer capability is available




 79


 Service or option not implemented, unspecified




 81


 Invalid call reference value




 82


 Identified channel does not exist




 83


 Suspended call exists, but this call ID does not




 84


 Call ID in use




 85


 No call suspended




 86


 Call with requested call ID is cleared




 88


 Incompatible destination




 91


 Invalid transit network selection




 95


 Invalid message, unspecified




 96


 Mandatory information element missing




 97


 Message type nonexistent or not implemented




 98


 Message not compatible with call state or message type nonexistent or not implemented




 99


 Information element nonexistent or not implemented




 100


 Invalid information element contents




 101


 Message not compatible with call state




 102


 Recovery on timer expiry




 111


 Protocol error, unspecified




 127


 Interworking, unspecified














 



Examples 

isdn network-failure-cause  28

 isdn protocol-emulate

 
 To configure a Primary Rate Interface (PRI) interface to serve as either the primary QSIG slave or the primary QSIG master, use the isdn protocol-emulate interface command. To disable QSIG signaling, use the no form of this command.

isdn protocol-emulate { user | network }


no isdn protocol-emulate { user | network }




Syntax Description  




 user


 Enter user (equivalent to the QSIG term slave) to configure the port as the terminating end. This is the default.




 network


 Enter network (equivalent to the QSIG term master) to configure the port as NT; the PINX is the slave.














Defaults 

 User



Command Modes 

 Interface configuration



Command History  




Release 
Modification



 12.0(7)T


 This command was introduced for the Cisco AS5300.




 12.0(7)XK


 This command was introduced for the Cisco MC3810, and for the Cisco 7200 VXR, Cisco 2600, and Cisco 3600 series routers. 




 12.1(2)T


 This command was implemented in the 12.1(2)T release.














Usage Guidelines 

 On the Cisco MC3810, this command replaces the command isdn switch-type {primary-qsig-slave | primary-qsig-master} command. 



Examples 

 The following example shows the command configuration on a Cisco 3660 series router T1 PRI interface:


interface Serial5/0:23
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving
 isdn protocol-emulate user


 isdn switch type

 
 To specify a central office switch type or configure a Primary Rate Interface (PRI) interface to support QSIG signaling, use the isdn switch-type global or interface command. To disable the central office switch type or QSIG signaling, use the no form of this command.

isdn switch-type {switch-type | primary-qsig | basic-qsig}


no isdn switch-type {switch-type | primary-qsig | basic-qsig}




Syntax Description  




 switch-type


 Service provider switch type. See Table 4 for a list.




 primary-qsig


 PRI




 basic-qsig


 BRI














Defaults 

 The switch type defaults to none, which disables the switch type.



Command Modes 

 Global configuration or interface configuration



Command History  




Release
Modification



 9.21


 Introduced as a global command.




 11.3 T


 Introduced as an interface command.




 12.0(2)T


 primary-qsig-slave and primary-qsig-master keywords introduced for the Cisco MC3810.




 12.0(7)XK


 primary-qsig-slave and primary-qsig-master keywords for the Cisco MC3810 are no longer supported. primary-qsig and basic-qsig keywords supported on the Cisco MC3810, Cisco 7200 VXR, 2600 and 3600 series routers.




 12.1(2)T


 The modified command was implemented in the 12.1(2)T release.














Usage Guidelines 

 You can enter the isdn switch-type command to support QSIG at either the global configuration level or at the interface configuration level. For example, if you have a QSIG connection on one line as well as on the BRI or PRI port, you can configure the ISDN switch type in one of the following combinations:



  

Table 4: ISDN CO Switch Types




Country
ISDN Switch Type
Description



 Australia 


 basic-ts013


 Australian TS013 switches




 Europe


 basic-1tr6


 German 1TR6 ISDN switches




 basic-nwnet3


 Norwegian NET3 ISDN switches (phase 1)




 basic-net3


 NET3 ISDN switches (UK and others)




 vn2


 French VN2 ISDN switches




 vn3


 French VN3 ISDN switches




 Japan


 ntt


 Japanese NTT ISDN switches




 New Zealand


 basic-nznet3


 New Zealand NET3 switches




 North America


 basic-5ess


 Lucent Technologies basic rate switches




 basic-dms100


 NT DMS-100 basic rate switches




 basic-ni1


 National ISDN-1 switches















Examples 

 The following example shows the command configuration on a Cisco 3660 series router T1 PRI interface:


interface Serial5/0:23
 no ip address
 ip mroute-cache
 no logging event link-status
 isdn switch-type primary-qsig

 isdn overlap-receiving
 isdn protocol-emulate user


Related Commands  




Command
Description



 isdn protocol-emulate


 Configures the interface to serve as either the QSIG slave or the QSIG master.













 Glossary

 





Note   For a list of other internetworking terms, see Internetworking Terms and Acronyms on the Documentation CD-ROM that accompanied your access server, and Cisco Connection Online (CCO) at the following URL: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ita/index.htm.
  



 AAL—ATM Adaptation Layer. Service-dependent sublayer of the data link layer. The AAL accepts data from different applications and presents it to the ATM layer in the form of 48-byte ATM payload segments. AALs consist of two sublayers: convergence sublayer (CS) and segmentation and reassembly (SAR). AALs differ on the basis of the source-destination timing used, whether they use constant bit rate (CBR) or variable bit rate (VBR), and whether they are used for connection-oriented or connectionless mode data transfer. At present, the four types of AAL recommended by the ITU-T are AAL1, AAL2, AAL3/4, and AAL5. 


 ATM—Asynchronous Transfer Mode. International standard for cell relay in which multiple service types (such as voice, video, or data) are conveyed in fixed-length (53-byte) cells. Fixed-length cells allow cell processing to occur in hardware, thereby reducing transit delays. ATM is designed to take advantage of high-speed transmission media, such as E3, SONET, and T3.


 CAS—channel-associated signaling. Trunk signaling (for example, in a T1 line) in which control signals, such as those for synchronizing and bounding frames, are carried in the same channel along with voice and data signals. 


 CCAPI—Call Control application programming interface (API).


 CDAPI—Call Distribution application programming interface (API).


 CCS—common channel signaling. Trunk signaling (for example, using Primary Rate Interface) in which a control channel carries signaling for separate voice and data channels. 


 CO—central office. Local telephone company office to which all local loops in a given area connect and in which circuit switching of subscriber lines occurs.


 codec—coder-decoder. Device that typically uses pulse code modulation to transform analog signals into a digital bit stream and digital signals back into analog.


 DTMF—dual-tone multifrequency. Use of two simultaneous voice-band tones for dialing, such as touch tone.


 DSP—digital signal processor.


 DVM—Digital Voice Module


 E1—European digital carrier facility used for transmitting data through the telephone hierarchy. The transmission rate for E1 is 2.048 megabits per second (Mbps).


 E&M—rEceive and transMit, or Ear and Mouth. Type of signaling originally developed for analog two-state voltage telephony using the ear and mouth leads; in digital telephony, uses two bits.


 Enbloc—Mode where all call establishment information is sent in the setup message (opposite of overlap mode, where additional messages are needed to establish the call).


 GFP—General Functional Procedures. Standard defined by ECMA-165.


 H.323—Extension of ITU-T standard H.320 that enables videoconferencing over LANs and other packet-switched networks, as well as video over the Internet.


 ISDN—Integrated Services Digital Network. Communication protocol offered by telephone companies that permits telephone networks to carry data, voice, and other source traffic.


 Overlap—Mode where call control is waiting for possible additional call information from the preceding PINX, since it received acknowledgment that the subsequent PINX may receive additional call information.


 FXO—Foreign Exchange Office. A voice interface emulating a PBX trunk line to a switch or telephone equipment to a PBX extension interface.


 FXS—Foreign Exchange Station. A voice interface for connecting telephone equipment, emulates the extension interface of a PBX or the subscriber interface for a switch.


 IETF—Internet Engineering Task Force.


 ISDN—Integrated Services Digital Network. Communication protocol, offered by telephone companies, that permits telephone networks to carry data, voice, and other source traffic.


 packet—Logical grouping of information that includes a header containing control information and (usually) user data. Packets are most often used to refer to network layer units of data.


 POTS—plain old telephone service.


 PDVM—packet data voice module.


 PINX—private integrated services network exchange.


 PSTN—Public Switched Telephone Network. General term referring to the variety of telephone networks and services in place worldwide.


 QoS—quality of service. Measure of performance for a transmission system that reflects its transmission quality and service availability.


 QSIG—Q (point of the ISDN model) Signaling. Signaling standard. Common channel signaling protocol based on ISDN Q.931 standards and used by many digital PBXs.


 T1—Digital WAN carrier facility. T1 transmits DS 1-formatted data at 1.544 Mbps through the telephone switching network, by using alternate mark inversion or B8ZS coding.


 T1 trunk—Digital WAN carrier facility. See T1.


 TCCS—Transparent Common Channel Signaling.


 TDM—time-division multiplexing.


 Trunk—Physical and logical connection between two switches across which network traffic travels. A backbone is composed of a number of trunks.


 UNI—User-Network Interface. ATM Forum specification that defines an interoperability standard for the interface between ATM-based products (a router or an ATM switch) located in a private network and the ATM switches located within the public carrier networks. Also used to describe similar connections in Frame Relay networks.


 VAD—voice activity detection.


 VoFR—voice over Frame Relay.


 VoATM—voice over ATM.





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Posted: Wed Sep 27 17:58:45 PDT 2000

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