PE> I didn't even know it was part of the V.34 spec to ask the other
PE> modem to send out a list of frequencies, presumably at a fixed
PE> transmission level, so that modem stats could be produced.

True, its a bit hard to keep track of what people like you do know about
that sort of stuff, and a non trivial exercise to succinctly explain all the
basic stuff about V34. You really could do a full semester course on it alone.

PE> In fact, I was under the impression that the USR would
PE> report the line level stats even for a V32bis link.

No, it cant. There is very little data on V32bis calls.

PE> Probably even a V21 link.

None.

PE> I had no idea it was an inherent part of all
PE> protocols, even ones designed 10 years ago,

It isnt, just VFC and V34 as far as that direct measurement
of the line characteristics is concerned, and a large part
of why it can do twice what V32bis can do thruput wise.

PE> to honour a "transmit multiple frequencies at fixed level" command.

Just VFC and V34. V32bis works out whats possible
speed wise in a completely different way.

PE> As to a THEORY about how I would attempt to measure line quality if I
PE> were designing a modem, I will first ask what the test is that Telecom
PE> do when they come out to your place after you have reported a bad line.

They dont do anything like the measuring that V34 does.
@EOT:

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