Direct station selection circuit

Details Direct station selection circuit Direct station selection circuit

1975-08-11

1977-06-28

Claffy, Kathleen H.

179 18AD, H04M 172

Patent

active

040327248

ABSTRACT:
Within a key telephone system, there is provided a circuit for completing a direct signalling path from a first station to another station in the system. By depressing a button at the first station designated with identifying indicia of the other station, a direct speaking connection is made from the first station to the other station. The first station may be an attendant's position with direct key appearance for each station to which the attendant is to have direct access. In a preferred form, the called station has a loudspeaker associated with the station instrument. In this instance, a direct call results in a signalling tone directed to the loudspeaker, following which the attendant can converse with the speaker-equipped station. With an attendant's position, depression of a direct station key automatically places a line to which the attendant had been connected on hold.

REFERENCES:
patent: 3210475 (1965-10-01), Breen et al.
patent: 3299217 (1967-01-01), Burns
patent: 3725601 (1973-04-01), Jetzt et al.
patent: 3819871 (1974-06-01), Verdon
patent: 3872261 (1975-03-01), Shinoi et al.
patent: 3904834 (1975-09-01), Shinoi et al.
patent: 3931477 (1976-01-01), Warman

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