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Fax SIP inbound / incoming SIP/2.0 488 Not Acceptable Media

Hi, Expert.

I have some problem with fax.

Outgoing Fax not issue, but Incoming fax issue with error SIP/2.0 488 Not Acceptable Media.

Please see my debug and configuration.

Everyone's tags (1)
4 REPLIES 4
Engager

Seems duplicate of;

Seems duplicate of;

https://supportforums.cisco.com/discussion/12716896/488-not-acceptable-media

Hi, Friend.

Hi, Friend.

Please advice my issue. 

Beginner

Muhammad,

Muhammad,

The incoming dial peer does not support fax:

dial-peer voice 1 voip
 description INCOMING FROM PSTN SBC
 translation-profile incoming PSTN-inbound
 session protocol sipv2
 incoming called-number .
 voice-class codec 1  
 dtmf-relay h245-alphanumeric rtp-nte
 no vad

Hence when the outgoing leg sends a REINVITE to renegotiate fax, we reject that leg with 488.

~Avinash

Hi, all.

Hi, all.

My problem has been solve, after discussions with ISP.

ISP try to change configure and enable feature T38 or fallback g711.

Thanks guys.

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