--- "D. Duccini" <[EMAIL PROTECTED]> wrote:
>> first part is correct, but once it is digital at
the
>> CO, it must stay that way right to (and thru) the
ISP.
>> ISP's run digital modem banks for 56 k operation
with
>> PRI lines.
> no, no they don't. we, for example, use
> channelized T1's which of course
> stays digital the entire way
the older 56k's were banked and connected via a T1 but
everything we've used recently are all PRI. i was
trying to say that the connection was digital all the
way, be it BRI, PRI, T1, T3, OC etc...
> and we have an older set of modems hooked into a
> channelbank for clients
> that have older modems or "issues" with the Ascend
> Max 6096's we run
you have server side v90's that connect to a channel
bank fxs circuit???
we have customers that sure could use those.
>> two 56 k modems NEVER connect faster than 33.6 k
to each other. 56 k
>> service is asymetric, server to user can be up to
56 k, but user to
>> server cannot be over 33.6 k To operate 56 k, the
isp modem is a
>> server side 56 k modem (not like the 56 k modem in
your pc - but they
>> are available in a bri version as well as pri).
> bri is an ISDN thing -- modems are analog using POTS
bri is a DIGITAL thing that can connect to a two port
server side v90. and can take two calls from two v90
user modems. and this it not an isdn b channel
digital end-to-end. we have customers that use this
for RAS to windows from a work at home employee using
a v90 to their home analog phone line.
> i merely pointed out the analog nature of why 56k
> modems don't talk 56k to
>> on the kxtd, there is a way to get 56 k speed.
use bri isdn lines!
>> the digital internal switching goes out the
digital isdn line to the
>> isp. no extra conversions in the way. (i have
never seen a kxtd
>> locally with a bri card, i think australia is the
only place they are
>> common.)
> are you certain that the pots jack on the back of
> the handset and the a/d
> encoding that occurs in the KSU is good enough?
David Jenkins (i hope my memory is at least close on
the name) has bragged here serveral times about using
xdps at 56k with his bri lines. I'm jealous!
I guess I need to check the d1232 that has the T1
card, that should pass 56k just as well from the xdp
port. I've had so many problems there that modems on
xdps was something I never got around to testing. The
customer has two T1's for internet data so there was
no reason to use xdp ports ;-)
I didn't mean to be critical of your comments, thought
the info might help those trying to use modems and the
xdps.
-larry
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