H - Electricity – 04 – M
Patent
H - Electricity
04
M
363/13
H04M 9/02 (2006.01)
Patent
CA 1093717
A B S T R A C T Equipment for the transfer of digital information between several lines which form part of an exchange network, and a plurality of subscriber stations which are connected via subscriber connection circuits in series to a loop on which bit groups circulate in exclusively one direction, and wherein the subscriber connection circuits check all bit groups filtering out those bit groups intended for them, replacing each filtered out bit group by another bit group and sending out these replaced bit groups in place of the ones filtered out, wherein; the lines belonging to the exchange network are PCM multiplex lines; the start and the end of each loop and at least one PCM multiplex line of the exchange network are connected to respectively one network connection circuit; the bit groups circulating on the loops are telegrams comprising an address part, a signaling part and an information par ; the network connection circuits are adapted to convert the content of each PCM time slot arriving successively on a PCM line into the information part of a tele- gram; they further insert the relevant time slot numbers as the address part of the telegrams and send these out onto the relevant loop; and they conversely convert the information part of the telegrams arriving from the loop into the content of the PCM time slots associated with the telegram addresses.
274553
Forss Bertil
Hafner Emanuel
Fetherstonhaugh & Co.
Hasler Ag
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