PACKET FRAME TRANSMITTING SYSTEM

摘要

PURPOSE:To provide the packet frame transmitting system for extracting the synchronism information of a frame head in packet transmission with any simple circuit when transmitting packet data while securing the frame synchronism of PCM communication signals in a PCM communication system. CONSTITUTION:This packet frame transmitting system is provided with a transmission station for converting packet frames to N (N is an integer >=2) pieces of packet data frames and transmitting them while securing frame synchronism with the frame synchronizing signal of PCM communication and a reception station for receiving the frames from this transmission station through packet signal transmission link and demodulating packet data by extracting the frame synchronizing signal. Then, the system is equipped with a position signal generating circuit 34 for generating position information showing a gap between the edge part of the data signal of the packet data frame and the leading position of the frame synchronizing signal of the PCM communication for the unit of a bit and a multiplexing circuit 30 for inserting the position information to the leading part of the packet data signal in the first packet frame among the N pieces of packet data frames.