Point-to-multipoint communication system and method

Details Point-to-multipoint communication system and method Point-to-multipoint communication system and method

1994-03-31

1996-09-03

Hofsass, Jeffery

Telephonic communications

Subscriber line or transmission line interface

379413, 3701101, 370 941, H04J 316

Patent

active

055531350

ABSTRACT:
A point-to-multipoint communication system includes a central telephony unit having at least one telephony module interface coupled to at least one set of telephony modules. Each set of telephony modules includes a predetermined number of telephony modules connected in a daisy chained configuration. Each telephony module includes a plurality of terminal communication equipment interfaces which allow a corresponding number of terminal communication equipment to be coupled to each and every telephony module. Each terminal communication equipment responds to a unique terminal communication identifier which is transmitted with each message from the central telephony unit. The point-to-multipoint communication system includes a configuration mode which allows the system to automatically map its configuration including the number of telephony modules in each set and the number of terminal communication equipment coupled to any one telephony module. In an operational mode, the point-to-multipoint communication system allows a message to be transmitted generally simultaneously to each telephony module in a telephony module set, whereby a terminal communication equipment responds to a message only when the terminal communication equipment identifier in the message corresponds to the unique terminal communication identifier of the terminal communication equipment. The point-to-multipoint communication system is adapted for use in a mass transport vehicle such as an airplane cabin whereby each telephony module services at least one segment of one row of airplane seats, and whereby each terminal communication equipment is disposed at one airplane cabin seat.

REFERENCES:
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patent: 4935923 (1990-06-01), Shimizu et al.
patent: 5012466 (1991-04-01), Buhrke et al.
patent: 5181199 (1993-01-01), Motoki et al.
patent: 5187707 (1993-02-01), Chu et al.
patent: 5208811 (1993-05-01), Kashio et al.

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