Re: Secondary Dialtone on T1 CAS

jrhofman · ‎01-15-2003

I have a T1 CAS connection to the PSTN via a 2620 gaateway. When I place an inbound call to the gateway I just get secondary dialtone.

POTS peers is

Called-number .

Destination pattern 9T

Direct-inward-dial

port 1/0

I have tried removing the direct-inward-dial statement as well but always get secondary dialtone. Carrier sees 4 digit DID coming in when he connect tester to the circuit. However, my debug ccapi command shows no digits being recieved.

Any ideas?

scadora · ‎01-15-2003

Your dial-peer looks a little strange. The port should be something like 1/0:2,

where 2 is the index of the ds0-group on your T1. This looks like an analog dial-peer. Can you post more of the config?

Shelly

jrhofman · ‎01-16-2003

Yes. The example I gave came from memory and was inaccurate.

I think this is more accurate but I don't have the accual config available.

controller T1 1/0

cablelength short 655

ds0-group 0 timeslots 1-12 type e&m-wink-start

dial-peer voice 10 pots

incoming-called number .

destination-pattern 9T

progress_ind alert enable 8

progress_ind progress enable 8

progress_ind connect enable 8

direct-inward-dial

port 1/0:0

dial-peer voice 100 voip

preference 1

destination-pattern 3...

session target ipv4:10.1.4.6

dtmf-relay h245-alphanumeric

codec g711ulaw

dweiner · ‎01-15-2003

do you have a voip dial-peer for your incoming calls?

pacameron · ‎01-15-2003

put the keywords 'dtmf dnis' after the controller ds0 group config -

controller t1 1/0

ds0-group 0 timeslots 1-24 type e&m-wink-start dtmf dnis

you may also need the direct inward dial option on the first POTS dial peer as well , but test with and without it.

jrhofman · ‎01-16-2003

dtmf dnis not available with wink-start.

Here's a more accurate config. By the way, we can place outbound calls fine.

Here's the config:

controller T1 1/0

cablelength short 655

ds0-group 0 timeslots 1-12 type e&m-wink-start

dial-peer voice 10 pots

incoming-called number .

destination-pattern 9T

progress_ind alert enable 8

progress_ind progress enable 8

progress_ind connect enable 8

direct-inward-dial

port 1/0:0

dial-peer voice 100 voip

preference 1

destination-pattern 3...

session target ipv4:10.1.4.6

dtmf-relay h245-alphanumeric

codec g711ulaw

scadora · ‎01-16-2003

At this point, I would try loading a different IOS version. If you're sure the digits are getting sent but are not being detected at the T1, then there could be something wrong with the 2600. If not the software, then perhaps you've got a funny dsp. The config looks fine, though I would removed the direct-inward-dial statement just to be safe (it really only applies to PRI). Oh, one other thing -- did you check to make sure that dial-peer 10 was in fact matched to the incoming call?

Shelly

jrhofman · ‎01-16-2003

While I have not seen the output of the CCAPI debug directly I'm assuming no dial peer is being matched because the router is not seeing digits, hence the secondary dialtone.

We have a TAC case open on the problem.

shintani · ‎01-16-2003

In my experience, a dialtone from the PSTN gateway meant the router could not "send" the call to a destination (Call Mgr, analog gtw, etc). I used to use the dialtone as test to make sure the PSTN circuit and DIDs were setup properly by the carrier. If I did not have my Call Mgr and IP phones setup yet, I would put the Gateway router on the PSTN and make inbound calls. The dialtone confirmed the call was arriving at my site, and looking at debugs I could tell which DID and DNIS were being received.

Two things to check.

1) If you are using DID, several command lines need to be accounted for in the POTS dialpeer.

2) You need a VoIP dialpeer to send the call somewhere using Destination Target to your CM Mgr with the right dial pattern. Use "...." if you are recieving 4-digits as DID/DNIS.

Below is a sample config (it is from a ISDN PRI gateway using DID, but should very similar)

SAMPLE

dial-peer voice 1 pots

incoming called-number .

direct-inward-dial

dial-peer voice 10 voip

preference 1

incoming called-number .

destination-pattern 8...

progress_ind setup enable 3

voice-class codec 1

voice-class h323 1

session target ipv4:10.146.124.10

dtmf-relay h245-alphanumeric

ip precedence 5

no vad

Mike Shintani

shintani@soltec.net