FFA SendFax rejects T.38 reINVITE (488 Not acceptable here)

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Hello,

I’m trying to send a tif file, using Fax for Asterisk and the call is
executed, but when I get the reINVITE with T.38 data, the local server
doesn’t recognize that we have this capability and sends a 488 message.
These are the logs:

<--- SIP read from UDP:xxx.xxx.xxx.xx8:5060 --->
INVITE sip:1234567@10.0.0.3:5060 SIP/2.0
Via: SIP/2.0/UDP xxx.xxx.xxx.xx8:5060;branch=z9hG4bK0dB004c7e5e3c3e60a8
From: ;tag=gK0d817deb
To: “Fax” ;tag=as0ddeacb5
Call-ID: href=”mailto:74ca1e4e3e86a1b873428773477e201f@yyy.yyy.yyy.yyy”>74ca1e4e3e86a1b873428773477e201f@yyy.yyy.yyy.yyy
CSeq: 1785 INVITE
Max-Forwards: 70
Allow: INVITE,ACK,CANCEL,BYE,INFO,NOTIFY,PRACK,UPDATE,MESSAGE,PUBLISH
Accept: application/sdp, application/isup, application/dtmf,
application/dtmf-relay, multipart/mixed
Contact:
Supported: timer
Session-Expires: 1800;refresher=uas
Min-SE: 90
Content-Length: 303
Content-Disposition: session; handling=required
Content-Type: application/sdp

v=0
o=Sonus_UAC 218 7126 IN IP4 xxx.xxx.xxx.xx8
s=SIP Media Capabilities
c=IN IP4 xxx.xxx.xxx.xx7
t=0 0
m=image 6202 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:9600
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:262
a=T38FaxMaxDatagram:176
a=T38FaxUdpEC:t38UDPRedundancy
a=sendrecv

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