This chapter describes how to implement the QSIG for Tool Command Language Interactive Voice Response (Tcl IVR) 2.0 feature. Q.SIG support is required for European countries to interconnect enterprise customers to a wholesale voice solution. The feature provides transparent Q.SIG interworking with a Tcl IVR 2.0 voice application on a Cisco IOS voice gateway. This functionality can be enabled using a new CLI on the POTS or VoIP dial-peer. Prior to this feature, Q.SIG messages were interpreted by the Tcl IVR 2.0 application, rather than passed transparently to the remote endpoint.
Feature benefits include the following:
Increased interconnection options for VoIP wholesale providers
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see
Bug Search Tool and 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 module.
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 QSIG for Tcl IVR 2.0
Perform the prerequisites that are listed in the "Prerequisites for Configuring an ISDN Voice Interface" section.
Ensure that the VCWare version used for the Cisco AS5300 is compatible with the Cisco IOS image being used.
VCWare applies only to the Cisco AS5300.
Before configuring IVR Version 2.0 features, do the following:
Download the Tcl scripts and audio files to be used with this feature. Store them on a TFTP server configured to interact with your gateway access server.
Create the IVR/Tcl application script to use when configuring IVR. Store it on a server or at a location where it can be retrieved by the gateway access server. Then configure the server to use IVR with the application that you created.
Configure the dial peer on incoming POTS or VoIP dial peers.
Restrictions for Configuring QSIG for Tcl IVR 2.0
Restrictions are described in the "Restrictions for Configuring ISDN Voice Interfaces". In addition, the following apply:
This feature is applicable to only the following:
VoIP and POTS dial peers
Tcl IVR version 2.0 only; not version 1.0
Information About QSIG for Tcl IVR 2.0
Q.SIG support is required for European countries to interconnect enterprise customers to a wholesale voice solution. The Q.SIG for Tcl IVR 2.0 feature provides transparent Q.SIG interworking when using a Tcl IVR version 2.0 voice application on a Cisco IOS voice gateway. This functionality can be enabled using a new CLI on the POTS or VoIP dial-peer. Prior to this feature, Q.SIG messages were interpreted by the Tcl IVR 2.0 application, rather than passed transparently to the remote endpoint.
General information about ISDN voice interfaces is presented in the "Information About ISDN Voice Interfaces" section.
Creates the application to be used with your IVR script and indicates the location of the corresponding Tcl files that implement this application. The location can be a URL, directory, or TFTP server.
Exits the current mode.
Configuring Supplementary Service for a POTS Dial Peer
To configure supplementary service for a POTS dial peer, perform the following steps.
The supplementary-servicepass-through command controls the interpretation of supplementary service (QSIG, H.450, and so on) on a gateway. When the CLI is enabled (that is, set to passthrough mode), the supplementary service message (usually in Q.931 facility message) is transparently sent to the destination gateway without any interpretation (raw). When the CLI is not enabled (the default), the supplementary service message is decoded and interpreted by the gateway. This CLI is available under VoIP or POTS dial peers.
This CLI has effect only if a Tcl IVR 2.0 application is configured on the same dial peer. The default session application always performs transparent Q.SIG interworking. Tcl IVR 1.0 applications always interpret and consume the Q.SIG supplementary services messages.
Command or Action
Enters privileged EXEC mode. Enter your password when prompted.
Router# configure terminal
Enters configuration mode.
Router(config)# dial-peer voice 99 pots
Enters voice dial-peer configuration mode for the specified POTS dial peer.
Router(config-dial-peer)# application ap1
Specifies the application that handles incoming voice calls associated with this dial-peer.
Configures supplementary service feature to transparently pass supplementary service to the next gateway.
Exits the current mode.
Verifying QSIG and Supplementary Service
To verify QSIG and supplementary service, perform the following steps (listed alphabetically).
Use this command to display the status of all ISDN interfaces, including active layers, timer information, and switch-type settings.
Use this command to display the basic router configuration.
Configuration Example for QSIG for Tcl IVR 2.0
The following sample output is typical of that for implementation of
supplementary service. ISDN supplementary service messages from PBX 1 are sent
transparently to PBX 2 by routers 1 and 2 as if PBX 1 and PBX 2 were connected
directly to each other.
Figure 1. QSIG for Tcl IVR 2.0: Sample Network Topology
Router# show running-config
Current configuration :3531 bytes
service timestamps debug datetime msec localtime
service timestamps log datetime msec localtime
no service password-encryption
no logging buffered
ip host jurai 22.214.171.124
ip host dirt 126.96.36.199
ip host CALLGEN-SECURITY-V2 188.8.131.52 184.108.40.206
trunk group 323
isdn switch-type primary-ni
voice service pots
fax interface-type modem
mta receive maximum-recipients 0
partition flash 2 8 8
controller T1 0
clock source line primary
ds0-group 1 timeslots 1-4 type e&m-fgb dtmf dnis
Rule 1 ^.% 1
ip address 172.19.140.96 255.255.255.0
no ip route-cache
no ip mroute-cache
no ip address
ip route 0.0.0.0 0.0.0.0 172.19.140.1
ip route 220.127.116.11 255.255.255.255 18.104.22.168
no ip http server
snmp-server community public RW
snmp-server packetsize 4096
mgcp profile default
dial-peer cor custom
dial-peer voice 650 voip
session target ipv4:22.214.171.124
dial-peer voice 100 pots
incoming called-number 650233....
dial-peer voice 1001 voip
incoming called-number 650233....
dial-peer voice 12345602 voip
dial-peer hunt 6
line con 0
exec-timeout 0 0
logging synchronous level all
line aux 0
line vty 0 4
exec-timeout 60 0
General ISDN References
"Overview of ISDN Voice Interfaces" --Describes relevant underlying technology; lists related documents, standards, MIBs, and RFCs; and describes how to obtain technical assistance