Unable to receive (most) faxs

FreePBX
1

Hello everyone,

I’ve set up an incoming DID to fax recipient.
Some of the faxes go through but I fear many of them don’t get passed on properly.

I’m using a G200 digium PRI Gateway with T.38 enabled redundancy. same settings in freepbx chan sip page.

below is my fax stats :

FAX Statistics:

Current Sessions : 0
Reserved Sessions : 0
Transmit Attempts : 1
Receive Attempts : 362
Completed FAXes : 362
Failed FAXes : 235

Spandsp G.711
Success : 0
Switched to T.38 : 0
Call Dropped : 0
No FAX : 0
Negotiation Failed : 0
Train Failure : 0
Retries Exceeded : 0
Protocol Error : 0
TX Protocol Error : 0
RX Protocol Error : 0
File Error : 0
Memory Error : 0
Unknown Error : 0

Spandsp T.38
Success : 127
Call Dropped : 12
No FAX : 0
Negotiation Failed : 0
Train Failure : 0
Retries Exceeded : 136
Protocol Error : 10
TX Protocol Error : 55
RX Protocol Error : 22
File Error : 0
Memory Error : 0
Unknown Error : 0

when looking at the CDR log I can see the following :

many of the incoming calls to the Fax DID ends up with Hangup instead of ReceiveFax.
when looking at debug i see the following :
– Executing [s@ext-fax:5] ExecIf(“SIP/G200-HOT-00005a03”, “1?Set(FAXSTATUS=“FAILED: error: Disconnected after permitted retries statusstr: Disconnected after permitted retries”)”) in new stack

any help on how to troubleshoot this is much appreciated .

NC.

2

Well, it definately LOOKs like you are having isues but since you’ve cut out the CallerID’s don’t know. fax machine try again, so if you see a hangup, and then a ReiceiveFAX, then it’s probabnly working after a few tries.

Sending Faxes over VOIPis a tricky proposition, and we don’t do it. As for receiving a FAX, we don’t have any issues.

3

I believe you can add ‘fax’ to your log-files options in the GUI. It might show you WTF . . . .

4

same numbers are displayed as you described. hangup and then recievefax. sometimes just hangups.

5

ok thanks .