-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 2015-08-06 13:46, Anton Aylward wrote:
I have a VoIP service. I don't know if it will work with FAX. I haven't had a fax machine. ever.
Some time ago I looked at asterisk and faxing, but only in theory, I had no chance to try it. Googling I just found a document: http://www.voip-info.org/wiki/view/Asterisk+fax «Across the Internet even a G.711 codec fax transmission is unpredictable. An excellent discussion of why faxing and modems don't work well over VoIP can be found here. However, people often get perfectly good results on lightly loaded LANs. It still isn't perfect, as a burst of data on the LAN can still upset things, but some people get results they can live with.» That "here" is : http://www.soft-switch.org/foip.html Faxing over IP networks «FAXing over VoIP networks doesn't work. You can sometimes arrange things so a fairly high percentage of FAXes get through OK. You can occassionally create setups that work 100% of the time. These are rare and unrepeatable setups. You need to use a proper FAX over IP protocol, such as T.38, to achieve consistent reliable FAXing across IP networks.» ... «Sending FAXes over VoIP networks usually fails. It is human nature to look for simple reasons for that, and simple cures. In reality, there are a number of reasons, and no certain universal cures. VoIP networks are designed to do a good job with speech. Carrying any sound other than a single voice speaking is not generally a system requirement. It shouldn't be too surprising if it works rather poorly.» The documents discuss how to do it, but setting up an asterisk server (plus hardware) is not trivial. You rather need access to a gateway service. Have a look in the second doc to the paragraphs after «FAX over IP (FoIP) specifications» «T.37 defines a procedure for receiving a FAX at a gateway; making an e-mail message, containing the FAX as an attachment; sending it to a remote gateway; and dialing out and delivering it from the remote gateway to the destination machine. It might optionally be delivered as an e-mail with a FAX attachment directly to the recipient's e-mail box. Also, FAXes might be sent directly to the store and forward system from a sender's e-mail box, for delivery to a dialed FAX number.» «T.38 is the real-time FAX over IP protocol. This means it is designed to work like traditional FAXing. You call another FAX machine, and send the FAX as you wait. Either FAX machine could be a traditional FAX machine connected to the PSTN, an ATA box, or similar; it could be a FAX machine with an RJ-45 connector plugged straight into an IP network; it could be a computer pretending to be a FAX machine.» But that assumes you have the hardware. Maybe it could be possible to design a software only implementation :-? I don't know. I think not.
I think it must be about a decade since I last sent a fax.
I had to routinely send a fax a month for my mother medicines, till she died. After that I haven't tried, but I still have the hardware and software. However, now I have fibre telephone, some kind of VoIP, I don't know if it would work. My guess is "no". - -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" (Minas Tirith)) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iF4EAREIAAYFAlXDYbEACgkQja8UbcUWM1xMWQEAj1pQ3FiIW0zrU+kL0UUpnQWZ 2iP0MyJrf7MsRhyOn5oA/3bDqgIumbi+fZe0aEshNNo9xeHzofOnl4ff6AY33BIw =SvLL -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org