Voice Issue between Cisco Call Manager and Nortel PABX

[rami.saber]

Hi,

We have a Cisco Call Manager (3.3) integrated with a Nortel Meridian PABX. The users from the Cisco Call Manager can call extensions in the Nortel PABX using the access code 2.

The call is established and the Nortel phones ring, but the issue no voice is recieved on both sides.

Im not very experienced with Voice and not sure where to start troubleshooting.

I have collected the debugging for: debug h245 asn1 (attached)

The integration was done through a Voice Gateway (Cisco 3745)

You can also find output for  show isdn status below while the call is estabilshed:

Vsat-Router#sho isdn sta

Vsat-Router#sho isdn status

Global ISDN Switchtype = primary-qsig

ISDN Serial4/0:15 interface

        dsl 0, interface ISDN Switchtype = primary-qsig

         **** Slave side configuration ****

    Layer 1 Status:

        ACTIVE

    Layer 2 Status:

        TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

    Layer 3 Status:

        1 Active Layer 3 Call(s)

        CCB:callid=8089, sapi=0, ces=0, B-chan=31, calltype=VOICE

    Active dsl 0 CCBs = 1

    The Free Channel Mask:  0xBFFF7FFF

    Number of L2 Discards = 0, L2 Session ID = 10

Thanks

[ronpatel · Accepted solution]

HI,

We have document which shows CUCM and Nortel Meridian using E1 QSIG.

http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/pbx/interop/notes/431470nt.pdf

Compare your configuration with the document and see if you have missed anything.

Regards

Ronak Patel

[rami.saber]

Thanks alot Ronak,

I just needed to do some changes in the Voice Gateway

I changed

isdn switch-type primary-qsig

to

isdn switch-type primary-4ess

and under the interface:

I changed

isdn switch-type primary-qsig

to

isdn switch-type primary-net5

Regards