Configuration for SIP Trunking between Avaya IP Office and Cisco CallManager Express 7.1

[femi.agboade]

Hi,

I have the task of allowing calls route between an Avaya IP Office and a CCME running on a 3825 router. I have both devices on the same subnet, but I have been unsuccessful so far in getting calling routed between them.

I would appreciate any pointers in getting this done as I would rather start from scratch.

All comments and suggestions are very welcomed.

Regards,

Femi

[Aaron Harrison · Accepted solution]

Hi

This could be one of a few things... it's possible it's a routing problem or perhaps a firewall or other security restriction...

For example, whilst the two systems (CME router, Avaya) can reach each other, the actual phones might not be able to reach each other. Can you ping a phone in one system directly from the voice VLAN of the other?

Are there any security devices/ACLs in between that migth need you to permit traffic direct from the Cisco phones to the Avaya phones/endpoint?

[femi.agboade]

Hi,

I have a suggestion from one of the Avaya support guys to add a default route to the IPO, will be exploring that in a minute...

As regards possible ACLs or security devices, there is none in between both systems as they both kind of sit on the same LAN.

One other observation though, calls from the Avaya to the CME is now failing. Do you think I need to include "incoming called-number 17..." to the dial peer configs?

[femi.agboade]

Hi there,

We made those changes to the Avaya IPO and voila, everything works just fine. Calls coming through and both ends are able to hear each other.

Thanks all for the support.

Cheers.

Femi