Gordon Henderson wrote: > but it's very do-able, given good Internet connections. [...] > I think your statements were just a bit too strong - I agree > wholeheartedly about the V. protocols and copper, but I've found in > practice that faxing over IP is not just theoretically possible, but quite > do-able, and is someone wanted to send me a fax (I have no fax machine, > they're so 80's :), then I'd not hesitate to setup a VoIP DID and give > them the number... > > Gordon >
Fair enough. However, my experience has been that defining "good Internet" for faxing over G.711 is not entirely self-evident. I've seen some really lagged environment work with FAX over G.711 like a dream. And some fast ones break badly: While I don't have full explanations for this, it _seems_ like the following holds true: good ping time sequence for faxes--no jitter (all times in ms): 40, 40, 40, 40, 40, 40, 40, 40... A bad one -- high jitter low latency: 5, 10, 5, 20, 18, 7, 12, ... A _really bad_ one -- "shifting" jitter: 20, 20, ... , 20, 20, 30, 30, 30,... No provable explanation as to why. John _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users