Re: [Asterisk-Users] FAX over IAX
From what I have heard packetizing fax does not work well, does not matter if it is IAX or SIP. I think that was straight from digium tech support. On Wednesday, April 2, 2003, at 09:53 AM, John Harragin wrote: Hi, We are looking at consolidating our lines with PRI. This will allow the elimination of many fax lines. Some of them will be replaced with this type of config ... PRI * IAX * Channel-Bank FAX We will have daggressor suppressor enabled. Is anyone doing this and should I expect smooth operation? John This e-mail was scanned and found clean by Monroe-Woodbury CSD Antivirus. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users Brian J. Schrock Network Engineer, RHCE, CCNA Anistone Technologies Phone: 614-798-9106 FAX: 614-573-7165 6926 Avery Rd. Dublin, OH 43017 ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] FAX over IAX
I think the real solution is some piggy backed protocol that can be told this is fax information at one end, digitize the fax as if it were a faxmodem, stream it to the other end using a non-realtime protocol, and then initiate a fax call at the other end and restream out the data, all while possibly holding open the original call to indicate reception confirmation at the end. At 10:20 AM 4/3/2003 -0500, you wrote: From what I have heard packetizing fax does not work well, does not matter if it is IAX or SIP. I think that was straight from digium tech support. On Wednesday, April 2, 2003, at 09:53 AM, John Harragin wrote: Hi, We are looking at consolidating our lines with PRI. This will allow the elimination of many fax lines. Some of them will be replaced with this type of config ... PRI * IAX * Channel-Bank FAX We will have daggressor suppressor enabled. Is anyone doing this and should I expect smooth operation? John This e-mail was scanned and found clean by Monroe-Woodbury CSD Antivirus. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users Brian J. Schrock Network Engineer, RHCE, CCNA Anistone Technologies Phone: 614-798-9106 FAX: 614-573-7165 6926 Avery Rd. Dublin, OH 43017 ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] FAX over IAX
Some people run fax over IAX using ulaw codec on the local LAN. Martin On Thu, 3 Apr 2003, Brian J. Schrock wrote: From what I have heard packetizing fax does not work well, does not matter if it is IAX or SIP. I think that was straight from digium tech support. On Wednesday, April 2, 2003, at 09:53 AM, John Harragin wrote: Hi, We are looking at consolidating our lines with PRI. This will allow the elimination of many fax lines. Some of them will be replaced with this type of config ... PRI * IAX * Channel-Bank FAX We will have daggressor suppressor enabled. Is anyone doing this and should I expect smooth operation? John This e-mail was scanned and found clean by Monroe-Woodbury CSD Antivirus. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users Brian J. Schrock Network Engineer, RHCE, CCNA Anistone Technologies Phone: 614-798-9106 FAX: 614-573-7165 6926 Avery Rd. Dublin, OH 43017 ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] FAX over IAX
You should be able to packetize your fax calls without any problems. We have hundreds of fax and modem lines on MGCP IADs that connect to PRI gateways without problem, although I haven't tried with IAX. Be sure to use G.711 codec and disable echo cancellation, and if your network is robust with low latency and jitter, you should be fine. Brian Brian F. Jones [EMAIL PROTECTED] 256.705.5012 888.357.0500 x 5012 -Original Message- From: Brian J. Schrock [mailto:[EMAIL PROTECTED] Sent: Thursday, April 03, 2003 9:21 AM To: [EMAIL PROTECTED] Subject: Re: [Asterisk-Users] FAX over IAX From what I have heard packetizing fax does not work well, does not matter if it is IAX or SIP. I think that was straight from digium tech support. On Wednesday, April 2, 2003, at 09:53 AM, John Harragin wrote: Hi, We are looking at consolidating our lines with PRI. This will allow the elimination of many fax lines. Some of them will be replaced with this type of config ... PRI * IAX * Channel-Bank FAX We will have daggressor suppressor enabled. Is anyone doing this and should I expect smooth operation? John This e-mail was scanned and found clean by Monroe-Woodbury CSD Antivirus. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users Brian J. Schrock Network Engineer, RHCE, CCNA Anistone Technologies Phone: 614-798-9106 FAX: 614-573-7165 6926 Avery Rd. Dublin, OH 43017 ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] FAX over IAX
The way I've seen it done is that the incoming fax signal is digitized and compressed, then sent over the IP channel. It is done in real time. You end up taking up 7k-14kbps instead of the 32/64kbps you'd use to pass high enough audio quality to not irritate the modems. Unfortunately, this takes the same DSP work that is necessary to provide fax transmission/reception...and there have been problems with making that work. I think the real solution is some piggy backed protocol that can be told this is fax information at one end, digitize the fax as if it were a faxmodem, stream it to the other end using a non-realtime protocol, and then initiate a fax call at the other end and restream out the data, all while possibly holding open the original call to indicate reception confirmation at the end. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] FAX over IAX
On Thu, 2003-04-03 at 08:56, Jon Pounder wrote: I think the real solution is some piggy backed protocol that can be told this is fax information at one end, digitize the fax as if it were a faxmodem, stream it to the other end using a non-realtime protocol, and then initiate a fax call at the other end and restream out the data, all while possibly holding open the original call to indicate reception confirmation at the end. Well there's T.30 which is a store and forward mechanism, or T.38 which is a realtime fax relay but they cost $ for licensing of the protocols. --Karl At 10:20 AM 4/3/2003 -0500, you wrote: From what I have heard packetizing fax does not work well, does not matter if it is IAX or SIP. I think that was straight from digium tech support. On Wednesday, April 2, 2003, at 09:53 AM, John Harragin wrote: Hi, We are looking at consolidating our lines with PRI. This will allow the elimination of many fax lines. Some of them will be replaced with this type of config ... PRI * IAX * Channel-Bank FAX We will have daggressor suppressor enabled. Is anyone doing this and should I expect smooth operation? John This e-mail was scanned and found clean by Monroe-Woodbury CSD Antivirus. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users Brian J. Schrock Network Engineer, RHCE, CCNA Anistone Technologies Phone: 614-798-9106 FAX: 614-573-7165 6926 Avery Rd. Dublin, OH 43017 ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users -- Karl Putland [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] FAX over IAX
On Thursday 03 April 2003 09:56 am, Jon Pounder wrote: I think the real solution is some piggy backed protocol that can be told this is fax information at one end, digitize the fax as if it were a faxmodem, stream it to the other end using a non-realtime protocol, and then initiate a fax call at the other end and restream out the data, all while possibly holding open the original call to indicate reception confirmation at the end. Yes, but I believe the fax machines/modems talk periodically throughout the call, indicating reception for each page. It would need to be a realtime protocol, possibly TCP. If anything, you'd want to develop a fax driver for Asterisk, such that it could directly receive the fax document, then send the pages via email, a la voicemail. -Tilghman ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] FAX over IAX
Karl Putland wrote: Well there's T.30 which is a store and forward mechanism, or T.38 which is a realtime fax relay but they cost $ for licensing of the protocols. There is no cost to implement T.38. Open H.323 publicly supports T.38. Jeremy McNamara ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] FAX over IAX
I have to disagree here. I send and receive faxes over IAX all the time James On Thu, 3 Apr 2003, Brian J. Schrock wrote: From what I have heard packetizing fax does not work well, does not matter if it is IAX or SIP. I think that was straight from digium tech support. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] FAX over IAX
disable echo cancellation Can we currently do that on a per-channel basis? For our situation. * to iax to * to pbx, I need it on - as most of the traffic is voice. John -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Brian Jones Sent: Thursday, April 03, 2003 11:20 AM To: [EMAIL PROTECTED] Subject: RE: [Asterisk-Users] FAX over IAX You should be able to packetize your fax calls without any problems. We have hundreds of fax and modem lines on MGCP IADs that connect to PRI gateways without problem, although I haven't tried with IAX. Be sure to use G.711 codec and disable echo cancellation, and if your network is robust with low latency and jitter, you should be fine. Brian Brian F. Jones [EMAIL PROTECTED] 256.705.5012 888.357.0500 x 5012 -Original Message- From: Brian J. Schrock [mailto:[EMAIL PROTECTED] Sent: Thursday, April 03, 2003 9:21 AM To: [EMAIL PROTECTED] Subject: Re: [Asterisk-Users] FAX over IAX From what I have heard packetizing fax does not work well, does not matter if it is IAX or SIP. I think that was straight from digium tech support. On Wednesday, April 2, 2003, at 09:53 AM, John Harragin wrote: Hi, We are looking at consolidating our lines with PRI. This will allow the elimination of many fax lines. Some of them will be replaced with this type of config ... PRI * IAX * Channel-Bank FAX We will have daggressor suppressor enabled. Is anyone doing this and should I expect smooth operation? John This e-mail was scanned and found clean by Monroe-Woodbury CSD Antivirus. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users Brian J. Schrock Network Engineer, RHCE, CCNA Anistone Technologies Phone: 614-798-9106 FAX: 614-573-7165 6926 Avery Rd. Dublin, OH 43017 ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users This e-mail was scanned and found clean by Monroe-Woodbury CSD Antivirus. This e-mail was scanned and found clean by Monroe-Woodbury CSD Antivirus. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] FAX over IAX
James, I have to disagree here. I send and receive faxes over IAX all the time What echo_cans are you using on each end and do you have daggressive suppression enabled (one or both ends)? John This e-mail was scanned and found clean by Monroe-Woodbury CSD Antivirus. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
