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

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

dtmf relay

Hi

I hve a cucm6.0 connecting to a h323 gateway. calls to external ivr's are being setup without a problem, but when i try to send dtmf to the remote ivr, nothing is being received by the gateway.

voice-card 1
dsp services dspfarm

!

voice call convert-discpi-to-prog
voice rtp send-recv
!
voice class codec 1
codec preference 1 g711alaw
codec preference 2 g711ulaw
codec preference 3 g729r8
codec preference 4 g729br8
!

voice class h323 1
h225 timeout tcp establish 3
h225 timeout setup 3
!

no voice hpi capture buffer
no voice hpi capture destination
!

interface Serial1/0:15
no ip address
no logging event link-status
isdn switch-type primary-net5
isdn incoming-voice voice
no cdp enable
!

dspfarm rtp timeout 60
dspfarm codec g729 vad disable
dspfarm connection interval 60
!

dial-peer voice 1 pots
voice cut-through alert
destination-pattern .T
port 1/0:15
forward-digits all
!

dial-peer voice 100 voip

preference 1
destination-pattern xxxx
voice-class codec 1
voice-class h323 1
session target ipv4:x.x.x.x
dtmf-relay h245-alphanumeric
ip qos dscp ef signaling
no vad

Thanks in advance,

Johan

5 REPLIES
Silver

Re: dtmf relay

Johan,

I am unlcear on what you mean by external versus remote.  If you could clarify that it might help.

Additionally, if the IVR you are calling is through an H323 trunk or gateway try unchecking the "Wait for Far End H.245 Terminal Capability Set" box.

Thanks,

Art

New Member

Re: dtmf relay

Hi Art,

With both external and remote, i mean that the ivr doesn't belong to my company, but sits out on the PSTN. i have already unchecked the "Wait for Far End H.245 Terminal Capability Set" box. the topology is as follows:

Cisco IP Phone==>CUCM6==>h323 Gateway (3640)==>PSTN (through E1 PRI)

i think that the problem lies between the CallManager and the gateway, because debug h245 asn1 doesn't show dtmf being received by the gateway.

Silver

Re: dtmf relay

Johan,

ok - one further clarification - so if I understand the scenario you have two different IVRs that are accessed via the PSTN - one works with DTMF and the other does not - true?

If this is the case please run debug isdn q931 and place a call to each one so we can see a successful call and a failed one - in terms of DTMF.

Thanks,

Art

PS, have you tried fast start on the gateway?

New Member

Re: dtmf relay

Hey Art,

just when you think you've seen it all...

problem is fixed, and to tell you the truth, the solution is pretty embarrassing. i have two voice gateways at this particular site, one for routing pstn calls, and one for routing cellphone calls. one of the junior guys had added a more specific route pattern to the cellphone partition, which forwarded all the pstn numbers for the external ivr's to the cellphone gateway, which isn't set up for dtmf relay. once i had corrected the route patterns, everything started working normally.

anyways, thanks for your interest, i really appreciate it!!

cheers,

Johan

Silver

Re: dtmf relay

Johan,

np - glad to hear it's fixed

Cheers!

Art

420
Views
0
Helpful
5
Replies
CreatePlease to create content