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New Member

PSTN dialing not working..

Hi we have a Cisco 3845 voice gateway router. PSTN dialing is working fine with MGCP protocol...

However the same is not working with H.323 protocol.

Attached is the sh run and debug for 3845 router...

Using 0 dialing for PSTN and discarding 0 at route-pattern configuration.

Request help for this..



Hall of Fame Super Gold

Re: PSTN dialing not working..

Too many attachments make posts awkward to read.

Summarize just the necessary information in the post itself. Eg, no full config is needed, just the DP config.

New Member

Re: PSTN dialing not working..

Try amend/ add the following dial peer

dial-peer voice 12 pots

description **Outgoing Calls**

destination-pattern 0.T

progress_ind setup enable 3

progress_ind alert enable 8

progress_ind progress enable 8

progress_ind connect enable 8

port 0/1/0:15

Re: PSTN dialing not working..

You're getting disconnected because of 'no circuit/channel available'. I would suggest running 'debug isdn q931' as you may have some problems on the PRI rather than H323.

It is also advisable to create an incoming dial peer:

dial-peer voice 100 voip

incoming called-number .

codec g711ulaw

no vad

dtmf-relay h245-alpha

If you would like to use G729, just omit the G711 statement.


New Member

Re: PSTN dialing not working..

Hi Nic,

I have already tested with the incoming dial-peer...still i am getting disconnected..

But if it is a issue with PRI then how come the outdialing is working with MGCP protocol....

with mgcp i don't have any issues..

But i can run mgcp as i have to test mobile connect and mobile voice access both....

require inputs for the same..



Hall of Fame Super Gold

Re: PSTN dialing not working..

Compare "debug isdn q931" for a mgcp and a h.323 call, and you will see why the latter is failing.

New Member

Re: PSTN dialing not working..

Hi P.bevilacqua,

Attached is the "debug isdn q931" output for MGCP as well as H.323.

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