kent@uunet.uu.net (Kent Hauser) (10/06/89)
How is the calling number transmitted under Caller ID? All I can find
in my `Notes' is a comment that says it's on the subscriber pair. Any
help (and the appropriate bellcore pub number) would be appreciated.
Kent Hauser UUCP: {uunet!cucstud, sun!sundc}!tfd!kent
Twenty-First Designs INET: sundc!tfd!kent@sun.comezf@bbn.com (Ed Frankenberry) (10/09/89)
The calling number delivery specification is found in Bellcore
TR-TSY-000030, "SPCS Customer Premises Equipment Data Interface",
issue 1, November 1988. This technical reference describes the data
signaling used from the central office. The receiving side is
basically a simplex FSK modem operating at 1200 bps (like a Bell 202)
during the silent interval following the first ring.
For a generic description of the service, see TR-TSY-000031, "CLASS
Feature: Calling Number Delivery", issue 2, June 1988. There's also
another memo, TR-TSY-000391, "CLASS Feature: Calling Number Delivery
Blocking", issue 2, June 1988, if you're interested. These documents
can be ordered from:
Bellcore Customer Service
60 New England Avenue, Room 1B252
Piscataway, NJ 08854-4196
201-699-5800