During the course of the initialization of the QE1 system, the chip PM4354 can accomplish the task of synchronization of bit, frame and multiframe after the chip initialization by the software.

• QE1系统在系统初始化时，通过软件完成对硬件芯片PM4354的初始化工作后，便可利用该芯片完成4路E1的同步（位同步、帧同步和复帧同步）；