| 摘要 |
<p>PURPOSE:To facilitate transmission/reception of frame synchronizing information with simple constitution by providing a means matching a reception multiplex signal and transmission multiplex signal in frame phase and processing the channel synchronization in common for both the reception and transmission. CONSTITUTION:A reception multiplex signal S11 is subject to multiplex frame synchronization by a multiplex frame synchronizing circuit 1 and the result is inputted to a frame aligner circuit 2. Then a reception multiplex signal S13 in matching with the phase of the transmission multiplex frame is inputted from the circuit 2 to a multi-frame synchronizing circuit 3. On the other hand, a digital signal is inputted to the circuit 3 as a transmission multiplex signal S2 in a form that the signal is multiplexed from the channel 1 till the channel 24 sequentially by the transmission multiplex frame phase to the transmission line side. The circuit 3 aplies frame synchronization of an X-50 of each transmission/reception channel, inserts the information relating to the frame signal to the signals S13, S2, informs the result in the inside of the station and transfers it.</p> |
