[comp.dcom.telecom] Adjunct frames in crossbar offices

chip@vector.UUCP (Chip Rosenthal) (11/10/88)

My old antiquated crossbar central office is going equal access on
December 11. At first, I thought this meant we were going to a #5 ESS
or DMS-100 but no such luck. We're getting something called an adjunct
frame, which basically allows a crossbar office to emulate the equal
access aspect of an ESS office. Is anyone familiar with such setups?
For example, I was told that these systems could not place 10XXX
alternate carrier codes. However, since the system has started to
be installed (over the past two days my dial tone has been accepting
1's which were never required before), I've noticed that I get
different error messages if I dial 10288 or any other carrier code
followed by a phone number than if I dial an invalid carrier code.
So obviously, something is being cross checked. None of the phone
calls go through (yet) using this method, however I've found that
if I dial 10555, 10666, or almost any invalid carrier code, followed
by 0, I'll get a New York Telephone operator, two 0's and I get an
AT&T operator! Is this normal?

I'd like suggestions as to other experiments I should be trying in this
transitional period. And does anybody know if adjunct frames are REQUIRED
to provide 10XXX service? I've also noticed that invalid exchanges that
used to give me an error after 3d are now waiting for the full 7d.

Eric Corley
ecorley@dasys1.UUCP
phri!dasys1!2600@nyu