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- From: kityss@cbnewsd.cb.att.com (arnette.p.baker)
- Newsgroups: comp.org.eff.talk
- Subject: RE: InterState Caller ID
- Message-ID: <1992Dec22.224648.2466@cbnewsd.cb.att.com>
- Date: 22 Dec 92 22:46:48 GMT
- Distribution: na
- Organization: AT&T
- Lines: 43
-
- bhayden@teal.csn.org (Bruce Hayden) and
- >timhu@ico.isc.com (Timothy Hu) write:
-
- >>If you live in a state where CallID is not available, will your number
- >>still show up on their machine?
-
- It depends. The ANI (Billing Number) delivery provided by
- many long distance carriers to 800 number customers will deliver all ANI data
- that the Long Distance Carrier's network has. (Blocking, aka "privacy"
- is not applicable to ANI delivery.)
-
- Caller ID (TM) delivery is based on transport of the Calling Party Number.
- CPN may be different than ANI (for most of us residential POTS users
- it is the same. POTS= plain old telephone service). Until there is
- full Network Interconnect of SS7 (a signaling protocol that allows
- transport of CPN and a "blocking" indication) between a local
- telephone company and the Long Distance Carriers - Caller Id Delivery
- will probably not function on inter-state calls. This is because
- most, not all, state to state calls must use "long distance".
-
- However Network Interconnect is just around the corner. What happens
- then??? Well, technically the CPN and blocking indication can be
- transported between states - the rest will be up to the FCC and
- the courts I guess.
-
- >I believe so - I think that the caller's id is carried down to the
- >local exchange, where it is stripped out (since traditionally we
- >ad no way of using it). It is supposedly there for call setup and
- >accounting purposes. This is why (at least in Colorado) all caller ID
- >requires is an upgrade of the software in the local exchange - an
- >upgrade that is probably going to happen anyway (meaning that your
- >local exchange will have the capability for Caller ID probably long
- >before the local PUC will give you access thereof).
-
- ANI is passed from the local phone company to a long distance carrier
- (so they can bill the person for the call). CPN transport requires
- SS7 signaling. SS7 is most likely both a software and hardware upgrade
- for your local company.
-
- Just my simplified description. Not the opinion of my employer.
-
- Arnette Schultz
- kityss@ihlpe.att.com
-