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Problem with DTMF over SIP Trunk

Thiago Gandara
Beginner
Beginner

Hi voice team, a configured a SIP trunk on my router Cisco.

 

I´m using a CUCM 8.6 SCCP Phones -> H.323 -> Voice GW -> SIP Trunk -> Provider.

 

I configured the option " dtmf-relay rtp-nte" on dial-peer and works with majory number, but when i try to use DTMF with specific number, the number dont collect the digit.

 

I wonder why only a specific number does not accept dtmf?

 

Thanks,

4 RESPOSTAS 4

dsobrinho
Engager
Engager

Hi,


If is only one number that does not work dtmf, could not be problem of your config.


Try to re-check the trunk config in your equipment.

Or

 

GWY

 

dial-peer voice 1000 voip
 description ***OUTGOING CALLS TO ISP-PSTN***
 destination-pattern 7[123]..
 session protocol sipv2
 session target ipv4:10.113.0.2
 voice-class codec 1 
 dtmf-relay rtp-nte
 fax-relay ecm disable
 no fax-relay sg3-to-g3
 fax protocol pass-through g711ulaw
 no vad

 


Best regards,

Daniel Sobrinho

 

Daniel Sobrinho

HI,

The option "dtmf-relay rtp-nte" its appy on dial-peer.

Thanks,

Hi,

If the problem occurs only for a specific number that you call. The problem may be in the equipment where this number answers.

Best regards,

Daniel Sobrinho

Daniel Sobrinho

rafamar2
Beginner
Beginner

Hey

In this case the best thing to do:

 

1- on gateway collect the following, debug ccsip messages on the gateway which is sip trunking to ITSP. 

2- Place a test call to this specific number and try to send the DTMF

3- Collect the debug output

4- Take note of calling number / called number

With this you will be able to check which is the DTMF that is being negotiated on the far end, and if it's will be necessary to have a MTP to "translate" DTMF to this specific number.

Other question for you, are doing early offer or delay offer when calling to this number?

 

Thanks

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