Time division multiplexing point-to-multi-point optical time compression multiplexing transmission system

摘要

The invention relates to a time division multiplexing point-to-multi-point optical time compression multiplexing transmission system which provides bidirectional transmission, between equipment at a central office and n sets of equipment at subscriber premises. Each equipment comprises a receiving means which comprises a frame synchronization circuit. At least one equipment at said central office and said n sets of equipment comprises: a decision means for determining that the received optical signal is not a signal to be received in a period during which an optical reflection is not present when a predetermined signal after said frame pattern detected by said frame synchronization circuit is not a signal to be received in a period during which an optical reflection is not present; and an initialization means for initializing the frame synchronization condition when said decision means determines that said received optical signal is not a signal to be received in a period during which an optical reflection is not present.