| 摘要 |
Data signals in each channel over a plurality of sequential frames of a time division multiplex signal as received are temporarily stored in each channel memory, and are read out together from the channel memory at a given time to form a combined data signal. A start bit signal, a stop bit signal and an address signal corresponding to the channel are added to the combined data signal to form a start-stop synchronous fresh channel signal. The resultant N fresh channels are sequentially sent out to a common transmission line as a fresh time division multiplex signal with a reduced redundancy. A plurality of sub-equipments are connected to the common transmission line and take into the data signals of a channel assigned thereto according to the address data signal.
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