Re: CALLER ID?

["Perry E. Metzger" <pmetzger@lehman.com>]

Phil Karn says:
> Interesting. As expected, when I called 1-800-235-1414 from a PBX
> extension here at work, it read back the trunk number, not my actual
> extension number.  The same for a developmental CDMA digital
> cellphone, since we use PBX-style trunks from our switch.
> 
> But when I called it from a conventional AMPS (FM) cell phone using
> Pac Tel Cellular, I also got a number that was different than my
> mobile's real number. And when I called it back, I got a
> number-not-valid intercept.
> 
> Interesting. Apparently one real cellular switch also looks like a PBX
> as far as ANI goes.  I wonder how widespread this is. Anybody with a
> cell phone on a service other than Pac Bell who is willing to give it
> a try?

I have an even stranger datum to report -- when called from the ISDN
PBX here, ANI gets not just the building trunks but *MY* phone number.
Yes, it got the extension right, on the other side of the PBX. Hmmm...

.pm