Patent
1974-10-24
1976-02-24
Brown, Thomas W.
179 18BC, H04M 356
Patent
active
039405648
ABSTRACT:
A time division multiplex system is provided with a conference link to a common transmission highway. The conference link includes a plurality of incoming conference lines with in-gates disposed therein, and a plurality of outgoing conference lines with respective out-gates disposed therein. A common control containing a cyclic memory controls the in-gates for sequentially connecting the incoming conference lines to the common transmission highway during specific time slots, and controls the out-gates to connect an outgoing conference line to the common highway during a specific time slot to establish the conference connection. Each outgoing conference line is connected to a sample and hold circuit for reconstruction of the sampled signal transmitted thereto from the transmission highway, and thereafter to a common adder before being coupled to the incoming lines of the conference link.
An operator's console is provided from which the conference connections are established. Override means are controlled at the console to enable the operator to gain access to the common transmission highway and override the ingates of the subscriber links without disconnecting the subscriber links.
REFERENCES:
patent: 3171896 (1965-03-01), Bartlett
patent: 3274342 (1966-09-01), Brightman
patent: 3617643 (1971-11-01), Toy
patent: 3748394 (1973-07-01), Thomas
Brown Thomas W.
Burnnet Ralph W.
Jay, Jr. Theodore C.
Tadiran Israel Electronics Industries Ltd.
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