H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 3/30 (2006.01) H04M 3/18 (2006.01)
Patent
CA 2141198
A switching arrangement that can be connected in a communications channel that comprises a pair of lines, between sets of terminal equipment, which comprises: (i) a line switch (6, 7), that is series connected in each of the lines; and (ii) a control cir- cuit (8) for the line switches comprising: (a) a charge reservoir (9) that is connected between the lines; (b) a reservoir charging switch (10) that is connected in series with the charge reservoir and controls the charging of the reservoir in response to a signal on the line; and (c) a reservoir discharging switch (11) that is controlled by a signal on the line and will allow the reservoir (9) when charged to energise control terminals of the line switches so that the line switches (6, 7) can maintain in an open state for a period of time by discharging of the reservoir.
Fetherstonhaugh & Co.
N. V. Raychem Sa
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