NETWORK SYNCHRONIZATION APPARATUS RECEIVING E1 AND RS-422 METHOD REFERENCE CLOCKS AT THE SAME TIME

摘要

PURPOSE: A network synchronization apparatus receiving E1 and RS-422 method reference clocks at the same time is provided to solve the problems caused by an interface between a trunk line matching board and a reference clock receiving board, and improve the efficiency of the trunk line board by directly receiving E1 method reference clock at the reference clock receiving board. CONSTITUTION: An E1 matching part(31) receives E1 method reference clock supplied from a clock supply device(10). An RS-422 method matching part(32) receives RS-422 method reference clock supplied from the clock supply device(10). A reference clock selecting part(33) selects either E1 method reference clock or RS-422 method reference clock. A system clock reference clock generating part(34) generates the selected reference clock as a reference clock for generating a system clock and transmits the reference clock to a system clock generating board(40). A system clock distributing part(35) receives the system clocks generated in the system clock generating board for distributing the system clocks.