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echo: locsysop
to: Paul Edwards
from: Rod Speed
date: 1996-03-23 09:44:20
subject: netcomm

BG> Terminal      : 57600  8 data bits  No Parity
BG> Line          : 26400  V.34
BG> Current EQM   : 009

PE> And a 26400 connect to David on a better line.

BG> Yeah, that was a bit of a surprise.  Wonder why?

RS> Somethings seriously fucked there somewhere. We do know
RS> that Daves line is MUCH better than Pauls, so that result is
RS> completely mad on the connect rate, tho the EQM makes sense.

PE> I have documented the problem of M34F calling
PE> USR already.  Against BOTH modems actually.

RS> All you did was document the lower connect rate achieved. That message was
RS> discussing the EQM value and whether the lower connect rate achieved was
RS> related to the EQM. Clearly it isnt in that particular case of a good EQM.

PE> The lower connect rate is related to a Courier on the other end
PE> instead of an M34F.  David Begley proved that quick enough.

Pity that message was discussing the EQM values seen with different calls
and how much sense they made, and not just connect speeds. It was basically
trying to get some idea of how much sense the M34F EQM values made.

One very real problem with EQM values tho is that the CHANGE as
the carrier rate changes, they are mean to, thats what EQM is about,
its a measure of ERROR at the trellis level, its not a measure of
the line characteristics in a the direct sense the USR graph is.
@EOT:

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