H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/25
H04Q 11/04 (2006.01) H04M 3/60 (2006.01)
Patent
CA 1193701
ABSTRACT OF THE DISCLOSURE A switchboard control system in which a plurality of switchbaords are connected to a time division exchange and controlled by the time division exchange. A speech signal and a control signal (a signal of key information, display information, subscriber number information and other infor- mation necessary for the exchange operation by a switchboard operator), which are delivered and received by each switchboard and the time division exchange, are transmitted together by a common transmission line on a time-division multiplexed basis. On the side of the switchbaords are disposed a position controller, by which the signals are multiplexed and separated and the common transmission line and the switchboards are interconnected. For delivering and receiving the signals, a common channel signalling equipment is connected to the time division exchange and a remote common channel signalling equipment is provided in the position controller. Between these equipments, the control signal is transferred via the common transmission line and, between the remote common channel signalling equipment and each switchboard, it is transmitted via a control signal line constituted as a common bus separately of a signal line for the speech singal.
398892
Aoki Kenzo
Harada Hidemi
Matsuura Yoshiaki
Nagahama Yasushi
Takahashi Atsuhisa
Fetherstonhaugh & Co.
Fujitsu Limited
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