>What about fax machines working over a PRI T1 >line? Run FXS ports to each fax machine and the >TDM card will convert the digital T1 to analog >for faxing?
>I have no POTS lines, just a T1 (PRI soon if I >find out I can use asterisk for regular POTS-type >faxing). I tried that and wasn't happy with the results (TE110 -> TDM400). There's some frame slippage involved as soon as you hit the PCI bus that's enough to make faxing unstable (your box might fare better tho). It's small, but enough to cause problems. In my dialplan, I use spandsp to rx the fax, and I have an "exception list" of known fax machines that have a problem tying up to spandsp, and if an inbound fax machine's callerid = an entry on the list, Asterisk forwards the call to a regular fax plugged into an Adtran channel bank. Works Good. 50K+ faxes from May to Dec 31,05 with only a 1% failure rate. I maintain the exception list by having a script that examines the generated PDF after fax RX, and if it's less than 46 bytes, it's a bad fax, and it emails me / SMS's me about it. That way, as soon as a bad fax comes in I know about it, and sometimes I can be fast enough to update the exception list between retries, so the remote fax doesn't generate an error for the sender. ---- Begin Original Message ---- From: "Wiley Siler" <[EMAIL PROTECTED]> Sent: Wed, 11 Jan 2006 15:20:03 -0700 To: "Asterisk Users Mailing List - Non-Commercial Discussion"<[email protected]> Subject: RE: [Asterisk-Users] FXS or VOIP I think what he means is that an * server can support hundreds of phones because the server connects to the network via a NIC. Port count becomes irrelevant when you thing about VoIP phones connecting to a VoIP server. They connect over the network not point to point. It is just a matter of bandwidth and network topography at that point. If your desire it to connect a bunch of analog phones then you can use ATAs. I would recommend that you just replace them though. You should only need to worry about your POTS lines at this point. If you have 4 POTS lines, a single 4 port TDM card will suffice. Cheers, W -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Freeze Sent: Wednesday, January 11, 2006 2:57 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] FXS or VOIP On 1/11/06, William Boehlke <[EMAIL PROTECTED]> wrote: > > A single computer will handle hundreds of telephones. Just get a card > with more ports, or use an external gateway. I am sorry, I don't understand. Are you talking about analog FXS phones? All the PCI cards I have seen have a max of 4 FXS lines and the external boxes seem very expensive. -- Jim Freeze _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ---- End Original Message ---- Sent by Go2net Mail! _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
