Re: [iaxmodem-users] iax communications issues
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From: Lee H. <fa...@ho...> - 2009-01-22 20:37:12
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David Backeberg wrote: > hardware fax machine => POTS => channelized DS3 T1 bank => Cisco voip gateway => SIP over ulaw => asterisk => iaxmodem => faxgetty and hylafax > > I'm intermittently getting fax success. > > Far more reliably I get an initial call going through, hardware fax machine is negotiating tones, and then the call gets messed up, leading to the fax machine giving up and spooling the hardware fax to redial later, those redials usually also fail the same way. I'm only rarely getting a successful end-to-end fax, with a real document in hylafax. > Please send me a HylaFAX session log of the fax reception. Also, you may want to enable "record" in your iaxmodem config file and send me (privately) the .raw recordings found in /tmp/. However, I strongly suspect that at least part of the problem is jitter (i.e. packet loss) on the SIP link between the Cisco device and Asterisk. Please read this before you spend too much time: http://hylafax.sourceforge.net/docs/fax-over-voip.pdf Thanks, Lee. |