Introduction - Cisco C8510-CHAS5-RF - Catalyst 8510 Campus Switch Router Modular Expansion Base Application Note

Using cisco ios voice gateways to tunnel t1 qsig over sip (with cube)

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Introduction

This application note provides interoperability information and documented configurations for a toll bypass solution using Cisco IOS Voice

Gateways tunneling QSIG over SIP between two

Avaya PBXs

using T1 QSIG trunks. The IOS gateways establish the QSIG connection between the two PBXs via

dependant of the physical layer interface, this app note applies to both T1 and E1. This integration also demon

Cisco Unified Border Element (CUBE) in the SIP connection between the two Cisco IOS Voice Gateways. Figure 1 shows the integration

topology.

Interoperability was verified using a single CUBE. In a production deployment, two CUBEs will be required: one at either side of the toll

bypass network. Each CUBE is acting as a point of demarcation between the service provider network and the privately managed networks.

The topology in Figure 1 reflects this deployment. This application note includes a sample CUBE configuration that was used in the

verification with a single CUBE. It can be used as a guide in a production deployment with two CUBEs. The outcome of limitations and

features will not change with a second CUBE in the topology. However, modifications to CUBE and/or IOS Voice Gateway configurations

are necessary to point VoIP dial-peers to the proper session target IP addresses, based upon the implemented dial plan.

The following basic call and supplementary services features were verified: proper establishing and disconnecting of calls, calling name and

number presentation and restriction, alerting name, call transfer (consult and blind), call forwarding (all, busy, and no reply), callback

functionality, and voicemail access with MWI de/activation. All of the above features are tested with join or reroute schema in both internal

(local) and external network. Please note that this document does not address performance and scalability, which are part of a broader criteria

for a deployment-ready solution.

This application note uses the C3825 and C3845 IOS-voice-gateway. However other Cisco voice gateways are also an option to use since the

voice gateway implementation does not depend on the platform. Below is a list of Cisco platforms capable of voice gateway functionality

and CUBE functionality: Care must be taken when selecting a voice gateway platform depending on the capacity and capability required

for the intended deployment.

Cisco 1861 Integrated Services Router

Cisco IAD2400 Series Integrated Access Device

Cisco 2800 Series Integrated Services Routers

Cisco 3700 Series Multi-service Access Routers

Cisco 3800 Series Integrated Services Routers

Cisco AS5350XM Universal Gateway

Cisco AS5400XM Universal Gateway

Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com

Avaya PBXs

. The integration consists of two Cisco IOS Voice Gateways connecting to the

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SIP. Since QSIG is not

strates use of the

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