[asterisk-users] FFA SendFax rejects T.38 reINVITE (488 Not acceptable here)

[VoIP Question]

   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 at 10.0.0.3:5060 SIP/2.0
Via: SIP/2.0/UDP xxx.xxx.xxx.xx8:5060;branch=z9hG4bK0dB004c7e5e3c3e60a8
From: <sip:98765432 at xxx.xxx.xxx.xx8:5060>;tag=gK0d817deb
To: "Fax" <sip:1234567 at yyy.yyy.yyy.yyy>;tag=as0ddeacb5
Call-ID: 74ca1e4e3e86a1b873428773477e201f at 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: <sip:98765432 at xxx.xxx.xxx.xx8:5060>
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

<------------->
--- (16 headers 13 lines) ---
Sending to xxx.xxx.xxx.xx8 : 5060 (no NAT)
Got T.38 offer in SDP in dialog 
74ca1e4e3e86a1b873428773477e201f at yyy.yyy.yyy.yyy
Capabilities: us - 0x102 (gsm|g729), peer - audio=0x0 
(nothing)/video=0x0 (nothing)/text=0x0 (nothing), combined - 0x0 (nothing)
Non-codec capabilities (dtmf): us - 0x1 (telephone-event), peer - 0x0 
(nothing), combined - 0x0 (nothing)
Got T.38 Re-invite without audio. Keeping RTP active during T.38 session.

<--- Transmitting (no NAT) to xxx.xxx.xxx.xx8:5060 --->
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 
xxx.xxx.xxx.xx8:5060;branch=z9hG4bK0dB004c7e5e3c3e60a8;received=xxx.xxx.xxx.xx8
From: <sip:98765432 at xxx.xxx.xxx.xx8:5060>;tag=gK0d817deb
To: "Fax" <sip:1234567 at yyy.yyy.yyy.yyy>;tag=as0ddeacb5
Call-ID: 74ca1e4e3e86a1b873428773477e201f at yyy.yyy.yyy.yyy
CSeq: 1785 INVITE
Server: Smartel-PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
Supported: replaces, timer
Contact: <sip:1234567 at yyy.yyy.yyy.yyy>
Content-Length: 0


<------------>

<--- Reliably Transmitting (no NAT) to xxx.xxx.xxx.xx8:5060 --->
SIP/2.0 488 Not acceptable here
Via: SIP/2.0/UDP 
xxx.xxx.xxx.xx8:5060;branch=z9hG4bK0dB004c7e5e3c3e60a8;received=xxx.xxx.xxx.xx8
From: <sip:98765432 at xxx.xxx.xxx.xx8:5060>;tag=gK0d817deb
To: "Fax" <sip:1234567 at yyy.yyy.yyy.yyy>;tag=as0ddeacb5
Call-ID: 74ca1e4e3e86a1b873428773477e201f at yyy.yyy.yyy.yyy
CSeq: 1785 INVITE
Server: Smartel-PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
Supported: replaces, timer
Content-Length: 0



Please help.

Thank you.

Michael