Difference between revisions of "Fax over VoIP"
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* [[Send Receive Fax over T38]] | * [[Send_Receive_Fax-T38 | Send Receive Fax over T38]] | ||
Revision as of 06:45, 9 July 2009
Fax over VoIP is not reliable and does not work most of the time.
It is possible to get nearly 100% rate in rare circumstances but is very very low chance to get this.
Wide explanation lies in technology mismatch between FAX and VoIP as explained in Steves' Underwood article here.
Steve Underwood developed SpanDSP package which helped to implement FAX support into Asterisk, Freeswitch and other open-source VoIP platforms.
T38 protocol supposed to work reliable over VoIP, but the problems with this protocol are following:
- Different hardware vendors do not follow standards and T38 implementation on various hardware is mostly broken.
- Asterisk does not support T38 very well.
See also:
