Telephonic communications – Telephone line or system combined with diverse electrical... – To produce visual-graphic copy
Patent
1989-10-23
1991-05-21
Ng, Jin F.
Telephonic communications
Telephone line or system combined with diverse electrical...
To produce visual-graphic copy
379 93, 379 94, H04N 132
Patent
active
050181912
ABSTRACT:
This invention relates to methods of establishing facsimile (fax) connections. When it is determined that a call is a fax call, a fax indicator is sent with Common Channel Signaling (CCS) messages for that call. If a call with a fax indicator is received in a destination switching office, then the destination office checks to see if the called number is a fax number; if not, translation is made to find the number of a fax station for serving fax calls to the called number, and the call is completed to that fax station. Fax calls may be recognized by a fax class mark in an originating message from an Integrated Services Digital Network (ISDN) line or a dialed prefix such as #, #3, or an alternative common carrier code (10XXX) from an ordinary line. Calls may be automatically redirected to a store and forward system on busy or no answer, routed to one of a plurality of alternative destinations based on the day and time, junk fax calls may be screened, and a fax message waiting lamp on the called (voice) destination may be operated. For international calls, a translation from voice to fax may be made at an egress gateway switch; the fax calls may also be automatically routed over low distortion international transmission facilities.
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Catron Nancy A.
Famulare Richard J.
Fodale Joseph V.
Hanson Karrie J.
Koch Robert A.
AT&T Bell Laboratories
Ng Jin F.
Ulrich Werner
Woo Stella
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