Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

Caller does not hear a ringback

I have T1 connection between our Avaya System and Cisco Call Manager system using a Cisco 2801 mgcp gateway . When I make calls from the Avaya system phones to Cisco Call Manager phones everything works fine. The problem comes when I have a call come in through a PRI into to the Avaya system then routed over the T1 connection to the Call Manager system the caller does not get any ringback. The call goes through fine but the caller gets no ringback.

Call Manager Business Edition

System version: 6.1.2.1000-13

Any ideas?

Thanks,

Ron

10 REPLIES

Re: Caller does not hear a ringback

Can you post 'debug isdn q931' for the bad call?

-nick

New Member

Re: Caller does not hear a ringback

I can't do a debug on the isdn. The calls are coming over a T1 into the gateway, The PRI is going into the Avaya

New Member

Re: Caller does not hear a ringback

I should say it is configured as a T1 CAS

Cisco Employee

Re: Caller does not hear a ringback

Hi,

Is it a T1 CAS between Avaya and 2801 MGCP gateway or T1 CAS from PSTN?

Thanks,

New Member

Re: Caller does not hear a ringback

The T1 CAS is between Avaya and 2801 MGCP gateway

New Member

Re: Caller does not hear a ringback

When I did a sh voice call summary I saw that the VPM state of the call was

EM_WAIT_SETUP_ACK it stayed in that state until Voice Mail picked up the call.

New Member

Re: Caller does not hear a ringback

Give the following syntax a try.

voice rtp send-recv

New Member

Re: Caller does not hear a ringback

Thanks but it did not help.

Re: Caller does not hear a ringback

T1 cas is tougher, but the actual command that may help here is:

voice call send-alert

You may also get different results from this command:

voice-card 0

no local-bypass

-nick

New Member

Re: Caller does not hear a ringback

We changed the T1 cas connection to a PRI and it works fine. Thanks for your help.

373
Views
0
Helpful
10
Replies
CreatePlease to create content