Millions upon millions of businesses have fax machines attached to the public switched telephone network. You'll not see them all tossed to the road until something better comes along. Scan and e-mail has been around for quite some time now, and it's not generally viewed as better. If it...
It doesn't have to be analog. It can be on ISDN (e.g. T1), but it does need to be on PSTN to be extremely reliable. In my experience SIP/T.38 just isn't going to meet a 99% expectation.
Lee Howard
Chief Technical Officer
Mainpine, Inc.
http://www.mainpine.com
I think that whether a given FoIP implementation is "close enough" to PSTN will depend greatly upon the carriers involved, the FoIP implementation, and your own expectations. Because I tend to poke at fax at a low protocol level I can't answer this question for you because I'm much, much more...
FoIP is never as reliable as fax over PSTN. As FoIP is trying to approximate PSTN communication it is a technical impossibility to be as good as what it's hoping to approximate.
Lee Howard
Chief Technical Officer
Mainpine, Inc.
http://www.mainpine.com
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