Path: utzoo!attcan!uunet!cs.utexas.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request
From: westmark!dave@uunet.uu.net (Dave Levenson)
Newsgroups: comp.dcom.telecom
Subject: Re: Caller*ID and *69
Message-ID: <1771@accuvax.nwu.edu>
Date: 3 Dec 89 14:29:34 GMT
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In article <1758@accuvax.nwu.edu>, Dave_C_Henry@cup.portal.com writes:
 ...regarding caller-id

> 1) What areas do the incoming calls have to come from for the number
> to be displayed?

The call must be from a telephone served by a central office which
participates in the SS7 network.  That includes many 1ESS and 1A-ESS
switches.  Here in NJ, it excludes the newer 5ESS switches, at
present.  Also, it only works intra-lata.  Calls from outside your
LATA will probably be identified only as "OUT OF AREA".

> 2) Are there many phones on the market that will display Caller*ID
> information? If possible, I'd like to get a phone that would display
> the number rather than adding a separate box.

I have been looking for something like this.  I expect to see them
as the service becomes more widespread, but I haven't seen one yet.

> I'd also like some information about another feature, the one which
> will call back the last person who called you when you press *69.
 ...
> What kind of numbers will this service work with? (again,
> within the same state, local,etc.)

Same as caller-id.  It will let you call back anyone who called you,
as long as the call was intra-lata, and intra SS7 network.

Incidentally, this followup represents the state of this technology as
implemented by NJ bell as the posting date.  This is an evolving
technology, and I would expect it to change in several ways: The SS7
network will gradually encompass more of the local switching systems,
and therefore there won't be the large 'holes' in the coverage area we
have now.  Perhaps the information will be carried by the inter-lata
carriers, and will be able to deliver calling numbers on inter-lata
calls, as well as local ones.  Your telco may do things differently
from NJ Bell.


Dave Levenson                Voice: (201) 647 0900
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