| 摘要 |
STM (Synchronous Transfer Mode) and ATM (Asyncronous Transfer Mode) cell streams are supplied to STM and ATM switching exchanges STME and ATME via the cascade connection of a multiplexer (MUX), a transmission link (L1) and a demultiplexer (DMUX). The MUX and DMUX each consist of a switching element with several inputs (I1/2;13) and outputs (03,04/5) coupled to a common switching device (SB1,TM1;/SB2,TM2) via receiver (RC1/3) and transmitter (TC1.3) circuits. The common switching device samples the input cell streams at a frequency at least equal to the sum of the time slot frequencies of the time frames of the input cell streams. The time frames of the input and output cell streams are phase synchronous and the sampling of the input cell streams is performed in a predetermined order. The cells of the resultant (STM/ATM) cell steam are supplied to the trasnmitter circuits in fuction of their destination.
|
