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reg_cisco
Beginner

Error doing conferences between Cisco and Nortel phones

Hello everybody.

I have two different infraestructures in my telephony network.

One Cisco, with one publisher, a suscriber and two voice gateways, one of them connected with a Nortel CS-1000 PBX by a QSIG.

When I try to do a conference between a Cisco and a Nortel, the Nortel phone leaves the conference itself.

Between Cisco phones, there is no problem.

Can anybody help me?.

Thanks in advance

3 REPLIES 3
Manish Prasad
Contributor

How do you integrated Cisco with Nortel ? Which protocol ?

Does the Trunk/GW between Cisco and Nortel contains CFB in its MRGL ? Which all codec are in use when you do conference ?

If there is mismatch in codec then you need Xcoder for this.

Kirill Glushenkov
Enthusiast

Hello!

'one of them connected with a Nortel CS-1000 PBX by a QSIG..'using E1/T1? If yes, try to use 'debug isdn q931' to see, who sends release message. If it goes from CUCM, then go through steps that Manish has suggested.

Regards,

Kirill

 

Brian Meade
Rising star

Attach CallManager traces for one of these calls.

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