CCM 4.1(2)sr1, H323 Gateway with T1/PRIs and NO RINGBACK.

[jmujica]

Hi.

Another ringback problem. But this one is really weird. I have CCM 4.1(2)sr1 talking h323 with a 3725 with multiple PRIs on a PRI NFAS Configuration (that is why I didn't use MGCP in the fist place). Router is running 12.3(11)T3 code.

The problem I'm having is that when calling from the IP Phones to the outside world I can't hear ringback at all but the calls get connected. But the ringback problem is not all the time. I can make a couple of calls and the ringback works fine but the next call .. no ringback and the next one will have ringback again. I already use the progress_ind commands under the pots and voip dial-peers on the router without any luck at all.

Any ideas.. Even doing a transfer from Unity to the outside world the ringback is intermitent...

Thanks in advanced,

-Jose

[milay]

The ringback should come from the telco but sometime the telco can not send. You can try to use the "tone ringback alert-no-pi" command on the dial-peer voice # pots

More info can be found here:

http://www.cisco.com/en/US/tech/tk652/tk701/technologies_tech_note09186a0080094c33.shtml

Mike

[jmujica]

Hi.

I went to that document already up and down without any luck. I also used the tone ringback alert-no-pi. It is weird that the ringback is inconsistent.... Don't know what else to do... probably opening a TAC case. I have debugs from a call with ringback and another one to the same number without ringback. I can posted if needed..

Thanks,

-Jose

[jaywydra]

I'm having the same issue. Mine seems to only happen on long distance calls and it only started when we moved to a 3700 platform. When we put our 2600 platform back in it works fine with the same config. If we put the 3700 back in it works for a few days and then stops on all long distance calls. Tried all the commands in the document as well. Any luck yet?

Thanks,

Jason

[jmujica]

Jason,

No luck yet. On our setup it happens on random calls and we are also using a 3725 with T1/PRI interfaces.

Please let me know if you were able to resolve the problem.

-JJ

[Sascha Monteiro]

did you put in these on the pots dial-peer?:

progress_ind alert enable 8

progress_ind setup enable 3

[jmujica]

Yes.

I actually try all possible alternatives using the following documentation

http://www.cisco.com/en/US/customer/tech/tk652/tk701/technologies_tech_note09186a0080094c33.shtml#voipcalls

and I'm still having the intermitent ringback problems when calling from IP Phones through the PSTN using the 3725 as an H323 gateway using 12.3(11)T3 IP Voice.

I can post debugs from the router for a call with ringback and another to the same number without ringback if needed.

Thanks,

-JJ