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- Path: sparky!uunet!ogicse!qiclab!leonard
- From: leonard@qiclab.scn.rain.com (Leonard Erickson)
- Newsgroups: comp.dcom.modems
- Subject: Re: Caller ID
- Message-ID: <1992Aug28.141616.9591@qiclab.scn.rain.com>
- Date: 28 Aug 92 14:16:16 GMT
- Article-I.D.: qiclab.1992Aug28.141616.9591
- References: <94515@bu.edu>
- Reply-To: 70465.203@compuserve.com
- Organization: SCN Research/Qic Laboratories of Tigard, Oregon.
- Lines: 29
-
- nicos@cs.bu.edu (Nicos Kontopoulos) writes:
-
- >How does caller-ID work?
-
- >My understanding thus far is that when I call someone with caller-ID,
- >she/he can recognize my phone number. How is this achieved?
-
- >Isn't there a service provided by the phone company that does the
- >same?
-
- Caller-ID *is* "a service provided by the phone company"!!
-
- If your phone switch is capable of supporting Caller-ID, and the
- call originated on another Caller-ID capable switch, and the
- trunks between the two exchanges are set up for SS7 signalling
- (many are, and it'll be required in a few years) then *If* you
- have subscribed to Caller-ID, the phone switch will use Bell 202
- modem signals to send the phone number to you between the first
- and second rings.
-
- Bell 202 is an old *half-duplex* 1200 bps modem standard. It is
- *not* compatible with the Bell 212A full duplex 1200 bps modem
- standard.
-
- --
- Leonard Erickson leonard@qiclab.scn.rain.com
- CIS: [70465,203] 70465.203@compuserve.com
- FIDO: 1:105/51 Leonard.Erickson@f51.n105.z1.fidonet.org
- (The CIS & Fido addresses are preferred)
-