Problem with DTMF

[timuryuldashev]

Hello Community,

I am currently facing an issue with DTMF signaling in my CUCM 12.5 setup involving a CUBE and an ITSP. When I make a call to the number 712022103, the DTMF tones are not being transmitted correctly. However, when I call 781484008 (for example), the DTMF works as expected.

I have attached the relevant PCAP files, the output of the "show run" command, and the debug logs for further analysis.

Has anyone encountered a similar issue or can provide insights on potential causes? I would appreciate any guidance on troubleshooting this problem.

Thank you in advance for your assistance!

[Mohammadreza Hadi]

check this steps, maybe help >>

1- on CUCM, go to SIP Trunk with your CUBE, once check "MTP" option & test, then un-check "MTP" option & test..

2- on CUCM, go to SIP Trunk with your CUBE, set "DTMF Signaling Method" to RFC 2833 & test..

3- on CUBE, add "asymmetric payload full" as below & test.. >>
voice service voip
sip
asymmetric payload full

4- on CUBE, add "dtmf-relay rtp-nte" on your dialpeer to CUCM & to ITSP as below & test.. >>
dial-peer voice xx voip
dtmf-relay rtp-nte

5- also use this Debug command on your CUBE for more details.. >>
debug voip rtp session named-event