Single line telephone communication system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Apr 11, 1989
Issued Date -
N/A
app pub date -
May 5, 1987
filing date -
Apr 25, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
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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Family
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