I have problem with fax if it goes via SIP-to-SIP gateway.
The configuration is:
StoneFax <-H323-> CUCM6.1 <-SIP-> IOSGW <-SIP-> PSTN
The problem is: If PSTN gets SIP Invite message with âMedia Description, name and address (m): image 17856 udptl 101 t38â, then PSTN sends t38 messages that the Fax server cannot decode.
If I disable DTMF-relay in dial-peer configuration, then I can send and receive fax, but I do not use IVR function from outside. (âMedia Description, name and address (m): image 17948 udptl t38â)
Therefore I would like to remove only the media format 101 from the media type image in IOSGW.
How can I do this?
Thanks in advance,