There are ways around all of these.
>1) Local CO doesn't support ISDN.
Can be backhauled to a supported CO or a remote off of another CO.
>2) Your connection is via pair gain, SLC96, or other MUX =
tehcnology.
ISDN works in pair gains. I've done it. Of course the SLC needs to =
have it's T-1 provisioned for B8ZS/ESF and also needs an =
appropriate load in the generic.=20
>3) You are two far from your local C0 (something like 6.8 cable =
miles
is the limit).
The limit is about 18,000 feet and then you need a repeater, or =
18,000 feet from a SLC.
>This person's problem is most likely #2, since he mentioned cable =
pairs.
Usually is remote areas (like mountains), they will use somthing =
like a
SLC 96 actually uses 13 pairs to deliver 96 timeslots. 2 pairs for =
each T-1 (4 T-1's in a SLC-96), one pair for the order wire, one =
pair for fault locate, one talk pair, and 2 pairs for a hot spare =
T-1.
>SLC96 to get 96 POTS from two copper lines. You loose =
significant
(atleast to modems) bandwitdh from this, also.
I hate loose bandwidth. I think you mean to say you LOSE =
badnwidth. You only lose bandwidth with crappy modems that can't =
handle hot signals. My old provider had nothing but SLC-96 and I =
consistently connected at 28.8. And another thing, what is the =
difference between the codec in a SLC-96 and the one in the =
switch?=20
Kyle Platts
CSS-Tech
!NTERPRISE Networking Services