Tdma multiplexer-demultiplexer with multiple ports

Details Tdma multiplexer-demultiplexer with multiple ports Tdma multiplexer-demultiplexer with multiple ports

H - Electricity

04

J

363/11

H04J 3/06 (2006.01) H04B 7/212 (2006.01) H04J 3/07 (2006.01)

Patent

CA 1140282

ABSTRACT OF THE DISCLOSURE A TDMA multiplexer-demultiplexer includes a plurality of input/output ports and common control equipment. Each input port is capable of accepting information asynchronous to the TDMA clock and at typical terrestial clock rates. The input/ output ports perform all the necessary signal processing for a TDMA terminal including pulse stuffing, changing continuous asynchronous low rate information to high bit rate burst form as well as forward acting error correcting encoding, if desir- able. By incorporating all the signal processing in the multi- plexer-demultiplexer, much equipment duplication is eliminated along with eliminating a requirement for multiple high frequency control and timing signal line drivers and buffers. More par- ticularly, the transmit side of each port includes a separate elastic buffer to raise the input rate to a synchronous common higher rate. In addition, on the receive side, clocking on the low speed side of the expansion buffer is derived from the sta- tion's transmit clock.

328677

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