Mr. Rubinstein:
I have read a lot about the thread of faxing support in Asterisk as well as spanDSP. However, either I don't fully understand other people's applications or may be what I'm trying to do is different from what others are trying to do.
The fax support discussions you have been reading have revolved around having Asterisk behave like a fax machine, answer and decode the incoming fax call, and deliver the resulting received fax as an attachment to an email.
I have a very simple setup. I have an asterisk server with a TE110P connected to the PSTN via T1 PRI (Asterisk A). I have another asterisk server with a TDM40B board with 4 FXS ports (Asterisk B) where I have an actual physical fax machine connected to one of these ports. These two machines are in two separate locations connected via a point-to-point T1 circuit. What I wish to do is program a DID on the T1 so that when the call comes into Asterisk A on that DID, it will be routed via IAX2 to Asterisk B, which will in turn patch the call through the FXS port where the fax is connected. Obviously, I also wish to be able to send faxes in a similar opposite direction.
Is this possible with Asterisk? Will it work?
Yes. Yes. And totally unrelated to spanDSP and other discussions related to turning Asterisk into a fax machine.
Apart from the relatively trivial task of configuring your two Asterisk boxes to route calls appropriately, the only two things you need to pay attention to are (a) ensuring you use g711 for the IAX2 link (using, or permitting, any other codecs will destroy the integrity of the channel as far as data/fax modulation is concerned), and (b) ensuring that your IAX2 traffic takes priority on the T1 circuit so that other large data transfers do not introduce so much jitter or packet loss as to render the VoIP traffic unusable.
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George Pajari, netVOICE communications 604 484 VOIP (484 8647 x102)
Open Source VoIP/Telephony Specialists 1 877 NET VOIP (638 8647 x102)
www.netvoice.ca www.ip-centrex.ca
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