Ok, ok, I know there has been plenty of discussion on asterisk and fax - from this I understand:
1) First and foremost, use g.711 ulaw
Yes, the codec must be lossless.
2) Packet loss, etc...makes faxing over the internet unreliable
I'm not sold on this theory yet. I don't think that it's so much a matter of packet loss (this shouldn't occur regularly), but rather of latency. Transmitting packets over a network, and in particular the internet, can result in latency delays that could, in theory, pose a problem for FoIP, but I've heard of so many people successfully doing FoIP with equipment other than Asterisk (i.e. using Cisco VoIP equipment), that I tend to believe that the reliability factor is more a consequence of SIP or the equipment used (Asterisk and, in my case, a Sipura SP-2000).
I have used a HylaFAX system connected to an SP-2000 for both sending and receiving faxes. The fax call comes in to an FXO on the Asterisk server, which directs it over a small LAN to the Sipura. This arrangement works tolerably well, but it's quite noticeably less-reliable than when the HylaFAX server is connected directly to the PSTN. I don't know if the Sipura is to blame or if it's Asterisk, or if it's SIP design. Although I've used a number of IAXys for voice, I haven't tried using one instead of the Sipura for fax. (Testing that would be able to eliminate or isolate SIP+Sipura.)
Lee. _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
