[321] in Cypherpunks
Re: CALLER ID?
daemon@ATHENA.MIT.EDU (Perry E. Metzger)
Wed May 12 19:30:30 1993
To: karn@qualcomm.com (Phil Karn)
Cc: cypherpunks@toad.com
In-Reply-To: Your message of "Wed, 12 May 1993 15:49:48 PDT."
Reply-To: pmetzger@lehman.com
Date: Wed, 12 May 1993 19:08:08 -0400
From: "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
