Time division digital switching network

Details Time division digital switching network Time division digital switching network

H - Electricity

04

J

363/16, 363/23,

H04J 3/16 (2006.01)

Patent

CA 1040731

A B S T R A C T O F T H E D I S C L O S U R E A time division digital switching network comprises first multiplexing means in which first-order digital data channels transmitting words consisting of a given number of bits and having first rates which are different from but multiplies of one another undergo a first multiplexing converting them into a second-order digital data channels having a second predetermined rate. There- after there are provided second multiplexing means in which the second-order digital channels undergo a second multiplexing converting them into third-order digital data channels having a third predetermined rate. In a digital switching unit having at least one buffer store, the first-order-channel words multiplexed into the third-order channels are grouped at an address whose first part depends upon the second-order channel they occupy in the third-order channel and whose second part depends upon the first-order channel they occupy in the second-order channel. The bite of a given rank of the words of a second-order channel form a pseudorandom sequence having a known period and, therefore, the bits of a given rank of the words of a third-order channel form a number of interleaved pseudorandom sequences. The digital switching unit includes means for separating the interleaved pseudorandom sequences and for deducing from the bits composing them the second part of the address of the words.

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