Hi,
I have following call flow:
Fax server-(SIP)-CUCM-(SIP)-Gateway-(ISDN)-Provider
Fax server sent a Re-Invite with T38 SDP parameter
X-OfMa-IpMediaChannel: 310dacb178be4fd090e72ff995680f46
v=0
o=OfficeMasterDirectSIP 36494611 36494612 IN IP4 10.1.1.20
s=DirectSIP FAX 36494611
c=IN IP4 10.1.1.20
t=0 0
m=image 50792 udptl t38
a=T38FaxRateManagement:transferredTCF
a=T38FaxVersion:0
CUCM sent 100 Trying to the fax server
CUCM sent a Re-Invite to the gateway with "c=IN IP4 0.0.0.0".
Content-Type: application/sdp
Content-Length: 257
v=0
o=CiscoSystemsCCM-SIP 35079570 2 IN IP4 10.10.20.21
s=SIP Call
c=IN IP4 0.0.0.0
t=0 0
m=image 50792 udptl t38
a=T38FaxVersion:0
a=T38FaxFillBitRemoval:0
a=T38FaxTranscodingMMR:0
a=T38FaxTranscodingJBIG:0
a=T38FaxRateManagement:transferredTCF
But the Gateway disconnect the call, as he got this Re-Invite message.
2378734: Sep 10 22:50:24.886: %ISDN-6-DISCONNECT: Interface Serial0/1/1:0 disconnected from 123456789 , call lasted 6 seconds
2378735: Sep 10 22:50:24: ISDN Se0/1/1:15 Q931: TX -> DISCONNECT pd = 8 callref = 0x3A12
Cause i = 0x80D6 - Call with requested call id has been cleared
The gateway did not response to the Re-Invite so the fax call will be disconnected from the fax server.
voice service voip
fax protocol t38 version 0 ls-redundancy 2 hs-redundancy 2 fallback pass-through g711ulaw
Regarding this issue, I've checked the CSCva23548. The checkbox "Outgoing T.38 INVITE include audio mline" is disabled.
There is another bug "CSCtj50993" with IP:0.0.0.0 in T38 mode. But I'm not sure that I'm hitting this.
Do you have any suggestion for further troubleshooting steps.
