[asterisk-biz] SIP Fax OK?

Kevin P. Fleming kpfleming at digium.com
Tue Aug 7 13:44:38 CDT 2007


Matthew Rubenstein wrote:

> 	Also, the current T.38 "SIP Passthru" support in Asterisk means that
> Asterisk can connect two other SIP hosts (or two connections to eg. a
> single SIP/PSTN gateway host) that are carrying a call whose media
> content is just fax data, correct? But can't do anything but connect
> those endpoints (eg, save the fax on the Asterisk HD). But can that call
> be recorded to Asterisk HD with the fax data intact, or can extra legs
> (muted) be connected to a "fax conference" that feeds multiple receiving
> (POTS) faxes with the same incoming fax call data?

T.38 (really T.30, the base FAX protocol) is a bidirectional protocol;
it can't be saved and replayed in the way you are describing, or played
to multiple parties.

Asterisk does not currently have the ability to originate or terminate
T.38 calls, so it cannot save the FAX data or create a FAX from saved data.

-- 
Kevin P. Fleming
Director of Software Technologies
Digium, Inc. - "The Genuine Asterisk Experience" (TM)



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