PE> Or would you expect V32bis modems to always connect at 14400?

RS> Certainly not at 7200, thats extremely low. I would expect that if
RS> the line at your end or mine was marginal, we would occasionally see
RS> a 12000 connect and in fact I did with one particular line with the
RS> City BBS which I called daily for mail for a long time. He is on one
RS> of the most decrepit exchanges in Sydney apparently and doesnt have
RS> his lines in a rotary group, and you could see one line being a bit
RS> down performance wise. It always connected fine, sometimes at 12000
RS> and normally did manage to fall forward up to 14400 thru the session.
RS> Occasionally it connected at 14400 and fell back to 12000 for a bit
RS> and back up to 14400 too.

KR> thats odd,

RS> Nope.

KR> the city is on the same exchange as me, and it was upgraded
KR> a bit over 3 years ago, about the time that i moved in.

RS> That time I was talking about was before that.

KR> the implication of the phrase "he is on one of the most
decrepit...."
KR>                                   ^^
KR> is that the information is current.

Yes, when discussing that general question like that with Paul, I dont
choose to diligently check that what I did see when calling that BBS is
still true by making 100 fresh calls to see if I can still see that effect.
Yes, it would have been safer to say 'he is, or atleast was' etc. If you
dont care for the particular words I used in that particular message, when
not attempting to say anything definitive about his exchange now, and was
discussing that question of V32bis connects, stiff shit, your problem.

KR> i always seem to get about the same results with pauls board,
KR> it used to be around 1610 cps, now it is around 1660 cps, so
KR> the 456 exchange wouldn't seem to be a problem.

RS> Thats after the upgrade tho. And you cant use just the first
RS> three digits to determine the exchange technology anyway.

KR> in some cases true,

In many cases, few exchanges have just one technology, particularly
when upgrading from the geriatric crossbars, its hardly ever all cut
over to the new immediately, tho eventually Telstra does plan to have
all Sydney exchanges fully digital. It remains to be seen how long
that will take tho.

It may or may not be true that the particular lines that BBS has have been
converted over to modern digital technology, and YOUR statement that YOURs
was, and that they all share the same first three digits proves fuck all.

KR> but berowra is a compact and isolated community,

Fraid that aint necessarily going to see all lines converted
at once. AND we dont even know that even your line had any
more than the frontend upgraded, quite a few AREs had that.

KR> with the exchange roughly on the east west axis.

God knows what thats supposed to mean. Presumably you mean
that the SUBSCRIBERS who are connected to that exchange are.

KR> the city is approx 1 km north of it, i am 1 km south, so, unless they
KR> have two exchanges in the same building, we share the same technology.

The vast bulk DO share the same building, with more than one technology,
including my own which probably isnt that different in size. There is
also the question of what they have done with RCMs etc too.

And quite a few of those areas which are increasing the
number of lines substantially also have stuff like fibre to
the pillar which complicates the question considerably too.

KR> the city's lines though seem to have their own personalities,
KR> i don't know if it is the modems, the lines, or the various
KR> systems that comprise the board.

RS> It appears to be atleast the lines coz its been visible thru modem
RS> changes. The 'various systems that comprise the board' cant affect
RS> the line speed stuff, just the thruput which I wasnt discussing.

KR> the lines are the most probable cause.

Certainly there is some evidence that some numbers are worse than
others, but that doesnt necessarily mean that thats the line in the
sense of the cable out to the BBS, in geriatric crossbar exchanges you
can also get that effect WITHIN the exchange itself, primarily because
there is more in the way of hardware which isnt shared across all lines.

And yes, that was WHEN I was getting my mail from there daily,
I certainly dont know that that effect is still there today.

But its irrelevant to the general question of what you would expect
to see as far as the line speed and V32bis modems are concerned
whether its still there today, having observed it is enough.

RS> Even quite geriatric exchanges arent necessarily a problem speed
RS> wise with V32bis, in fact you get a bit more bandwidth with some
RS> of the crossbar exchanges than you do with digital exchanges.
RS> That primarily affects calls on the same exchange tho.

KR> certainly motorola fast talk 2 modems dont work well on
KR> the digital pabx at work where they are ok on outside lines.

Well, thats a different effect again. The reason for the better bandwidth
on the older crossbar exchanges on a call where both ends of the call are
on the same exchange is that you really do essentially just get a copper
pair from end to end, thru the crossbar relay connecting them. On say a
modern digital exchange like an AXE or S12, even when the call has both
the calling and called line on the same exchange, its still digitised in
the line cards and digital between the line cards.
@EOT:

---