Telephonic communications – Subscriber line or transmission line interface
Patent
1990-11-19
1993-06-22
Dwyer, James L.
Telephonic communications
Subscriber line or transmission line interface
379231, 379225, 379219, 379229, H04M 700
Patent
active
052221300
ABSTRACT:
A message arrangement and method for interfacing a digital telephone Digital system including a Digital Facility Line Card (DFLC) that connects a user operated Telephone Instrument (DTI) to a stored program operated digital Central Office (CO) system. The message arrangement comprises, a DFLC message processor that generates and transmits to the DTI control messages in response to report messages transmitted by the DTI, following a user activated DTI event. The control messages provide the user with visual and aural DTI operating information. The DFLC message processor further generates and transmits to a CO system central controller, device report messages requesting access to, and network services from the CO system, responsive to call processing report messages from the DTI. The CO system central controller sends device control messages to the DFLC which operates in accordance with the received device control messages to generate and transmit to the DTI, DTI control messages. The DTI control messages instruct the DTI to provide the user with operating information and to collect call processing data from the DTI, for transmission to the DFLC message processor. The DFLC message processor translates the call processing data and generates device report messages, which are transmitted to the CO system.
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Dailey Mark S.
Molling Joseph M.
Pflueger Michael W.
Slobodianuk David A.
AG Communication Systems Corporation
Baca Anthony J.
Dwyer James L.
Shehata M.
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