Single line telephone communication system

Details Single line telephone communication system Single line telephone communication system

1987-05-05

1989-04-11

Ng, Jin F.

Telephonic communications

Private or single line system

Doorbell system

379159, 379399, H04M 356

Patent

active

048213195

ABSTRACT:
A communication system for use with a single pair of externally provided telephone wires and a single pair of in-house wires for the provision of full intercom services and/or PABX type features to a plurality of subsets includes a line interface module connected between the single pair of externally supplied wires and a single pair of in-house wires. In addition, each subset is provided with a station adapter module between it and the single pair of in-house wires.

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