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Fax calls work over h323 but not sip

Hi All,

I have an issue where fax calls fail after the reinvite with the fax parameters.

If i change this to h323 it works fine.

If i look in the log i see:

SDPOfferInd: T38-SIP: Rejecting incoming T.38 invite. The MTP does not support Pass Thru for FAX. mPeerXferMode=10,mPeerCapCount=6  |2,100,213,1.32601^10.128.16.50^*

If i configure an mtp with pass through i see in the log that the T38 is sending more messages but there is still no high pitch screech after the initial tone.

It also breaks other fax calls if i force MTP on the trunk.

Log attached.

dd="7701"

Cheers

Kev

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