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Net Neutrality Never Really Existed?
dido writes "In his most recent column, Robert X. Cringely observes that network neutrality may have never really existed at all. It appears that some, perhaps all, of the major broadband ISPs have been implementing tiered service levels for a long time. From the article: 'What turns out to be the case is that some ISPs have all along given priorities to different packet types. What AT&T, Comcast and the others were trying to do was to find a way to be paid for priority access — priority access that had long existed but hadn't yet been converted into a revenue stream.'" Cringely comes to this conclusion after being unable to get a fax line working. His assumption that the (Vonage) line's failure to support faxing is due to Comcast packet prioritizing is not really supported or proved. But his main point about the longstanding existence of service tiering will come as no surprise to this community.
Most transport streams that deliver audio use UDP - it doesn't matter if you lose a few packets here and there because the human hear hears a reasonably good approximation of the original sound. There's no point trying to redeliver packets that get lost, because they will be late anyway by the time you get them there. This scheme will just plain not work with digital data, fax or whatever, if you're losing bits of it here and there. I suppose you could re-implement a reliable TCP-like protocol on top of the unreliable transport stream, but it would be so much easier to take a scan or a photo and email it.
"It doesn't cost enough, and it makes too much sense."
VOIP uses lossy compression that is heavily tuned for voice. Of course it is going to be lousy for lossless data transmission. If you wound the baudrate down low enough (say 2400baud), you might have some success, but I wouldn't guarantee it.
other than G.711 (uncompressed PCM), voice codecs will not handle fax or modem calls. The standard method of handling fax calls over IP is T.38.
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