[comp.dcom.telecom] "What's My Line?"

rogue@lll-crg.llnl.gov> (12/27/89)

I'm working on (re)wiring an old house for telephones, and need to be
able to identify which line I'm on without tracing the wires through
other tenants' apartments. I understand that Pacific Bell installers
(and, in fact, installers in most telephone companies throughout the
world) have set up a machine that tells you the number you're calling
from when you dial a certain 3-digit code. When I lived on the east
coast, the code was common knowledge and was often used by folks
installing their own wiring.

Does anyone know what the code is nowadays? When I called the business
office, the person who answered had no idea that such a thing even
existed.

If you know how to reach the machine in my area (Palo Alto, CA) or
anywhere else (many use the same numbers), please send e-mail.  It'll
save me a lot of probing!

<BG>

[Moderator's Note: Here we go again! There is *no single, standard
code* which applies everywhere. It varies from community to community.
If anyone knows the number currently in use in Palo Alto, please write
this fellow.  PT]