Hi, Anyone knows a software fax device which can act as a SIP UA? I want to have a SIP based FAX machine (sofware) on a PC associated with an Asterisk extension. Thanks, Dan
Hi Dan, If you find one please let me know although we've had no success looking for such a thing ourselves. Our experience to date in looking might be of some use to you though... We're trying to replace BRI lines with a H.323 connection to a telco over our leased line. Faxes remain one of the problem areas. Logic says that since faxes and modem were designed to send data over existing analogue voice channels that it should be possible to send them over VoIP channels but searching the archives for this list and elsewhere suggests otherwise. Apparently because the data is being modulated and then demodulated repeatedly through the various layers and VoIP is lossy it won't work. The solution seems to be T.38 fax relay although asterisk doesn't support it. We're playing with Hylafax (www.hylafax.org), an open source fax server. You might get lucky asking around there for SIP support but to my knowledge it only supports hardware modems. For us, we're looking at setting up asterisk extensions on a TDM-400P and then looping a physical wire into fax modems on a neighbouring machine. We've tested this with * dialling out and answering existing ISDN channels and forwarding to/from a normal fax machine and it works perfectly. IP wise, as I mentioned, we want to ditch the ISDN and use our H.323 connection. We have two *s in different countries talking to each other by IAX. Despite what the archives say, we have been able to send faxes from analogue fax machines connected at each end (or dialling in/out to one end) over a voice channel in between with no problems at all. We haven't tried over the H.323. yet but will be doing so shortly. I don't know which side of * you need the SIP connection but what works over the net shouldn't struggle on a LAN. On the basis of our limited experience so far, IP to outside seems to work fine and LANside you can either physically connect a fax modem to * or hook up something like an ATA186 to a fax machine/fax-modem. I hope this is of some help and look forward to hearing how you get on. Cheers, Simon ----- Original Message ----- From: "Dan" <dtoma@fx.ro> To: <asterisk-users@lists.digium.com> Sent: Thursday, May 22, 2003 9:10 AM Subject: [Asterisk-Users] SIP UA Fax device> Hi, > > Anyone knows a software fax device which can act as a SIP UA? > I want to have a SIP based FAX machine (sofware) on a PC associated withan> Asterisk extension. > > Thanks, > Dan > > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users >
How does Vonage do it?? -----Original Message----- From: Simon Woodhead [mailto:woodheads@gonegardening.com] Sent: Thursday, May 22, 2003 2:01 PM To: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] SIP UA Fax device Hi Dan, If you find one please let me know although we've had no success looking for such a thing ourselves. Our experience to date in looking might be of some use to you though... We're trying to replace BRI lines with a H.323 connection to a telco over our leased line. Faxes remain one of the problem areas. Logic says that since faxes and modem were designed to send data over existing analogue voice channels that it should be possible to send them over VoIP channels but searching the archives for this list and elsewhere suggests otherwise. Apparently because the data is being modulated and then demodulated repeatedly through the various layers and VoIP is lossy it won't work. The solution seems to be T.38 fax relay although asterisk doesn't support it. We're playing with Hylafax (www.hylafax.org), an open source fax server. You might get lucky asking around there for SIP support but to my knowledge it only supports hardware modems. For us, we're looking at setting up asterisk extensions on a TDM-400P and then looping a physical wire into fax modems on a neighbouring machine. We've tested this with * dialling out and answering existing ISDN channels and forwarding to/from a normal fax machine and it works perfectly. IP wise, as I mentioned, we want to ditch the ISDN and use our H.323 connection. We have two *s in different countries talking to each other by IAX. Despite what the archives say, we have been able to send faxes from analogue fax machines connected at each end (or dialling in/out to one end) over a voice channel in between with no problems at all. We haven't tried over the H.323. yet but will be doing so shortly. I don't know which side of * you need the SIP connection but what works over the net shouldn't struggle on a LAN. On the basis of our limited experience so far, IP to outside seems to work fine and LANside you can either physically connect a fax modem to * or hook up something like an ATA186 to a fax machine/fax-modem. I hope this is of some help and look forward to hearing how you get on. Cheers, Simon ----- Original Message ----- From: "Dan" <dtoma@fx.ro> To: <asterisk-users@lists.digium.com> Sent: Thursday, May 22, 2003 9:10 AM Subject: [Asterisk-Users] SIP UA Fax device> Hi, > > Anyone knows a software fax device which can act as a SIP UA? > I want to have a SIP based FAX machine (sofware) on a PC associatedwith an> Asterisk extension. > > Thanks, > Dan > > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users >_______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users
I read on the Vonage web site that they will offer you a 'second line' for 9.99. It looks like someone finally realized that the ATA-186 has TWO ports!!! If they are using a voice channel, or fax channel, what difference does it make. I mean the end result is stile "I got the Fax' and it works over TCP/imp so it satisfies those tow parameters. Maybe I am missing the point. So I will ask again. If a have a ATA-186 @ home talking to an Asterisk server @ my office with a PRI, can I set up a fax at home to be 'routed' via the Asterisk service in my office???? -----Original Message----- From: Simon Woodhead [mailto:woodheads@gonegardening.com] Sent: Thursday, May 22, 2003 3:22 PM To: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] SIP UA Fax device No idea Alex but interesting point. Does the ATA186 support T.38? If not, I guess they are doing it over the voice-channel. ----- Original Message ----- From: "Alex Lopez" <alex@opsys.com> To: <asterisk-users@lists.digium.com> Sent: Thursday, May 22, 2003 7:16 PM Subject: RE: [Asterisk-Users] SIP UA Fax device How does Vonage do it?? -----Original Message----- From: Simon Woodhead [mailto:woodheads@gonegardening.com] Sent: Thursday, May 22, 2003 2:01 PM To: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] SIP UA Fax device Hi Dan, If you find one please let me know although we've had no success looking for such a thing ourselves. Our experience to date in looking might be of some use to you though... We're trying to replace BRI lines with a H.323 connection to a telco over our leased line. Faxes remain one of the problem areas. Logic says that since faxes and modem were designed to send data over existing analogue voice channels that it should be possible to send them over VoIP channels but searching the archives for this list and elsewhere suggests otherwise. Apparently because the data is being modulated and then demodulated repeatedly through the various layers and VoIP is lossy it won't work. The solution seems to be T.38 fax relay although asterisk doesn't support it. We're playing with Hylafax (www.hylafax.org), an open source fax server. You might get lucky asking around there for SIP support but to my knowledge it only supports hardware modems. For us, we're looking at setting up asterisk extensions on a TDM-400P and then looping a physical wire into fax modems on a neighbouring machine. We've tested this with * dialling out and answering existing ISDN channels and forwarding to/from a normal fax machine and it works perfectly. IP wise, as I mentioned, we want to ditch the ISDN and use our H.323 connection. We have two *s in different countries talking to each other by IAX. Despite what the archives say, we have been able to send faxes from analogue fax machines connected at each end (or dialling in/out to one end) over a voice channel in between with no problems at all. We haven't tried over the H.323. yet but will be doing so shortly. I don't know which side of * you need the SIP connection but what works over the net shouldn't struggle on a LAN. On the basis of our limited experience so far, IP to outside seems to work fine and LANside you can either physically connect a fax modem to * or hook up something like an ATA186 to a fax machine/fax-modem. I hope this is of some help and look forward to hearing how you get on. Cheers, Simon ----- Original Message ----- From: "Dan" <dtoma@fx.ro> To: <asterisk-users@lists.digium.com> Sent: Thursday, May 22, 2003 9:10 AM Subject: [Asterisk-Users] SIP UA Fax device> Hi, > > Anyone knows a software fax device which can act as a SIP UA? > I want to have a SIP based FAX machine (sofware) on a PC associatedwith an> Asterisk extension. > > Thanks, > Dan > > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users >_______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users