Rod, at 13:27 on Mar 08 1996, you wrote to Bill Grimsley...

RS> Certainly with a decent modern digital exchange at each end,
RS> the signal is digitised at the line card on the end of the
RS> subs line, at the exchange end, and then nothing that happens
RS> at the digital level between the line cards can degrade the
RS> data between the exchanges other than a fault condition.

BG> Exactly, and you might just notice that that's what I've been saying.

RS> So why were you raving on about what happens in FO previously ?

I was simply stating that even though signal levels should remain constant
throughout its entire length, it is still possible that this may not always
be the case.  I also quite specifically stated that you can more or less
take it as read that they do just that.

RS> Yes, you have come to realise that once its got into the
RS> FO network, it cant vary call to call, but you were claiming
RS> the opposite at one time with your 'theoretically' type stuff.

No need to put words into my mouth just because you misunderstood what I
was saying about FO.  Of course the potential problems are mainly
theoretical, but it's also important to know that they CAN still occur.

Regards, Bill

--- Msgedsq/2 3.20