Matthew Boehm wrote:
What happens if asterisk receives a T.38 call? Will asterisk pass it thru?
I've seen a few ATA devices that support T.38 and I'm wondering what happens if a fax is sent thru one of these ATAs into asterisk.
Maby I have the terminology wrong. Is T.38 a protocol like SIP or is T.38 a
compression like G729 using SIP?
Right now it does not get handled. I think it looks like an unknown codec.
SIP is a signalling protocol. T.38 is more like a cross between a codec (e.g. G.729) and a transport (e.g. RTP). It defines its own UDP or TCP messages (although a proposal for using RTP as the transport exists). It defines a scheme for demodulating the modem tones, send their contents through the transport, and remodulating out the other end. If an endpoint is within a computer the demodulating and remodulating is skipped, and you get a T.38 package like the t38modem add on for OpenH323.
Regards, Steve
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