[comp.dcom.telecom] How Does Changing of Prefix by Telco Improve Service

rmadison@euler.berkeley.edu (Linc Madison) (07/30/90)

I was recently back at my alma mater, Princeton University, and
discovered that they have done some strange things with the
University's phone system, along somewhat similar lines to the UCSB
changeover.

The complete details are below for trivia buffs, but to summarize, the
University in 1982 installed a cumbersome set of dialing procedures
(with some dangerous repercussions) in order to allow the office
phones to have a different set of capabilities (all sorts of call
forwarding, three-way, billing codes, and other stuff) that the dorms
didn't get.  Now, they've changed to a new prefix (presumably because
609-452 had other users in segments not used by the University and
they needed more capacity) and reintegrated the dorms into the system
(although presumably without the fancy capabilities).

Why did I say it was dangerous?  In order to reach the campus
emergency number, you had to dial 121-3333.  But they didn't get
enough trunks to connect the dorms to the bureaucrats, so "121"
frequently busied out.  Add to that the fact that they disabled
9-452-xxxx for University extensions, and you have a potential
problem.  In fact, the only time I called the emergency number, I got
a busy on 121.  Fortunately, because I and others had seen this
problem coming, they had re-enabled 9-452-xxxx.

What follows are the gruesome details.

Way back when (1981-82):

Area                  Phone number     dialing from      dialing sequence
----                  ------------     ------------      ----------------
Univ. offices         609-452-xxxx     Univ. offices     2-xxxx
				       dorms             2-xxxx

Student dorms         609-734-xxxx     Univ. offices     4-xxxx
				       dorms             4-xxxx

Plasma physics lab    609-683-xxxx     off's/dorms       125/xxxx  **

** the / indicates separate dial-tone

  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Big change #1 (1982-85)

Univ. offices         609-452-xxxx     Univ. offices     xxxx
				       dorms             121/xxxx

Student dorms         609-734-xxxx     Univ. offices     8/4-xxxx
				       dorms             4-xxxx

PPL                   609-683-xxxx     off's/dorms       125/xxxx

  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Now (1990)

Univ. offices         609-258-xxxx     both              8-xxxx
                          ^^^
Student dorms         609-734-xxxx     both              4-xxxx

PPL                   609-683-xxxx     both              ??? (125/xxxx?)

  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

The other interesting thing about PPL is that it is physically located
in territory that should be in a 908 exchange; it's FX'ed out of the
Princeton CO for political reasons.


Linc Madison   =  rmadison@euler.berkeley.edu