| 摘要 |
PURPOSE:To economize the titled system by aligning framehead signals by the frame aligning part at the end of the transmission line, then removing the synchronizing circuit for each state frame from the transmit interface part furnished in the transmittal connecting line in the exchange station. CONSTITUTION:A read counter 44 causes a frame aligning circuit 33, by the time signal CLK in the exchange, to synchronize the outputs of the frame, and directs an MF synchronizing circuit 46 to take in the status signal (ST-) of each frame. The MF synchronizing circuit 46 synchronizes multiframes (MF) under the informing by the read counter 44, and likewise takes in the state signal (ST-) of each frame that is ordered in the prescribed position from the transmit signal on a link 15, as well as temporarily stores the signal in a buffer memory circuit 48, then transmits to the controlling part via a signal line ST. Therefore, the circuitry conventionally provided to take out each signal in the state frame in matching with the order of the controlling actions of the exchanger and output to the buffer memory circuit, is made unnecessary. In such a way, the state signal is taken out only by synchronizing the multiframes. As a result, the transmit interface part of the exchanger is economized. |
