Nortel Cisco Integration (Advance level ) 2

[mrmhar]

HIIIIIIII
i am working with cisco Nortel integration, the integration as the following:
Succession Side:

1- SIP calls Routed to the NRS then to the gateway of cisco
2- cisco gateway is added to the NRS statically
3- the same zone is configured for the virtual trunks and IP phones

Cisco side:
1- sip dial peer has been created for nortel extensions (and the session target is the Node IP)
2- dial peer ras has been created to the gateway zone
3- cisco gateway is registered to the cisco gatekeeper
4- zone prefix of the cisco gateway is the cisco extensions

the call is working fine from both sides.

Now the question is::
for the media i am using from cisco side the Transcoder and from the Norte Side it uses the phone for the media
the scenario is working with G.711
but with G.729 it is not working



the question is how i can change the media tramenation point from Nortel side to use the media card or another media source ???????


thanks in advance

 

[phonz1]

your problem is Cisco....but you cant get an answer from them I bet??

 

[mrmhar]

Ok...I agree with you but i wanna know what is the media source in nortel

 

[johnpoole]

media gateway card.. 90 percent sure... don't carve that one in stone... i perfer G.711 because qos is almost never a problem BUT, unless you've got killer bandwidth it is little more them a good test point


john poole
bellsouth business
columbia,sc

 

[teekow]

You need a DSP on both ends wherever transcoding occurs. If you go to an IP phone, there is no DSP used since the call arrived as VOIP. What G.729 issues are you having? Call setup but no speechpath? No call setup at all? Poor Speech Quality? Have you checked what happens when the IP phone forwards to voicemail? Does the Cisco caller hear the greeting properly?

Depending on what the problem is will lead to different possible solutions. First thought is that there are ways on the cisco gateways to setup the codec negotiation preference table. Make sure the G.729 you are using there matches the G.729 you are using in the Node. For example, you may have VAD turned off in the node, but it is on in the Cisco Gateway.

Hope this helps
Rob

 

[mrmhar]

now it's working fine with G.729 what i did as the following:

1- i check the codec G.729 with no VAD
2- use the G.729 in the dial peer of Nortel extensions
3- the same codec used in the dial peer of Cisco extensions
4- change in service parameters the default codec for Cisco to G.729
5- chech the fast start for outbound calls in the intercluster trunk configured in Cisco

now it's working fine
thaaaaaaaaaaaaaaaaaaanks for every one participate in this tread

 

[dulfo666]

mrmhar. How about turning this thread into an FAQ ?

I will be doing this same task soon, and I expect many of us will be.

Many thanks for starting the thread AND posting your findings.