Control signal transmission system for key telephone system

Details Control signal transmission system for key telephone system Control signal transmission system for key telephone system

1984-03-08

1985-11-05

Brigance, Gerald L.

179 99LS, H04M 100, H04Q 518

Patent

active

045515832

ABSTRACT:
A control signal transmission system for a key telephone system, in which control signal information is transmitted in a parallel signal configuration between a plurality of key telephone sets and a key service unit by the use of transmission lines one-to-one corresponding to the individual key telephone sets, and in which the information between the key telephone sets is transmitted using a serial signal format of a frame configuration so that time slots of respective frames are synchronized with respect to all of the transmission lines.

REFERENCES:
patent: 4027110 (1977-05-01), Takematsu et al.
patent: 4061887 (1977-12-01), Kasson et al.
patent: 4125749 (1978-11-01), Kinoshita et al.
patent: 4203011 (1980-05-01), Coviello
patent: 4314109 (1982-02-01), Sekiguchi et al.
patent: 4315110 (1982-02-01), Davis

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