H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/25
H04Q 11/02 (2006.01) H04Q 11/00 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 1037597
SWITCHING SYSTEM FOR MULTICHANNEL LINES Abstract of the Disclosure A switching exchange of the space switching type is adapted to provide interconnection of the lines of a com- munication network, each line being able to provide several multiplex channels, each channel being different from the other ones in the frequency domain, in the time domain or in any other way. The control unit of a switching exchange of the space switching type is adapted to enable the system to interconnect more than two lines of the multiplex type together, by the provision of complementary logic which determines for any new connection of multiplex lines whether the required connection is possible or not in accordance with the state of the network when this request occurs. This operation is carried out by checking what are the lines which would be interconnected should the required connection be made, and whether the use of the transmission channels in the assembly of said lines, as it is in the initial state, will cause interference between the channels when the required connection is made. To carry this checking out, independent groups of interconnected lines are defined. The fact that said groups are independent and the changes which can be caused to said groups and to their independence by any new condition determine the conditions to be checked before the new connection can be able to be made. Tables in memory, and logic, are provided to show present status and available possibilities of new interconnections.
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