rtpmap value change for dtmf to work 1

[AntBan]

Hi,
I have the following topology

CUCM--sip--VOICEGATEWAY---sip---SIEMENS HIPATH4000

When a phone connected to CUCUM is configured to unconditional forward to voice mail server and when I call from Siemens phone dtmf tones though sent are not working.
Reason is that voice gateway uses rtpmap value of 101 where as siemens sends dtmf on 98.

Is there a way to change the rtpmap on seimens to 101. Please let me know the commands or procedure to change it Thanks in advance for help.

 

[Moriendi]

Problems with DTMF and the H4K are almost always RFC2833 related.

You haven't mentioned what your software version is on the 4K.

Nevertheless, browse to the STMI card providing the IP trunk (you will need to use Hipath Assistant, Expert Access menu) and check the RFC2833 config. Try turning it off (tick box).