Hello list !
Here are my findings about fax support in openPBX.
I 'm running openPBX 1.2 svn 2549
spandsp version: spandsp-0.0.3pre28.tgz
SIP ATA Grandstream FW version: 1.0.8.32
T.38 Support:
=============
app_txfax: T.38 faxing from oPBX to GS 486 does not work. bug report will
follow, although
there are already some reports open.
app_rxfax: T.38 faxing to oPBX "seems" to work. A one page fax came through.
Success Rate (9/10)
T38 gateway: (I' have backported t38gateway into openPBX 1.2.)
FAX machine --> SIP ATA HT486 --> oPBX, zaptel --> Meridian 1 PBX (call pilot)
I had problems with fax switchover, I 'm using currently following workaround:
exten => _X.,1,Set(FAX_EXTEN=${EXTEN})
exten => _X.,n,FaxDetect(4)
exten => _X.,n,Goto(from_sip, ${EXTEN},1)
exten => fax,1,SipT38SwitchOver()
exten => fax,n,T38Gateway(Zap/g1/${FAXEXTEN}|debug)
exten => fax,n,Hangup()
exten => talk,1,SipT38SwitchOver()
exten => talk,n,T38Gateway(Zap/g1/${FAX_EXTEN}|debug)
exten => talk,n,Hangup()
Mostly there was a hangup from the zap interface. (success rate 4/10)
The other direction:
Fax --- > Meridian 1--> oPBX --> ATA HT 486 --> fax machine
did not work. (may be because of T.38 does not work in direction oPBX -->
Grandstream Adapter)
open bug reports: #270 and #271
T.30 Support:
=============
app_txfax: Normal T.30 faxing does not work.
Bug report will follow.
app_rxfax: seems to work (both, ecm and non-ecm)
Best regards
Hans
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