... clock input interface, one channel 10MHz input interface, E1×N input interface N=1234, DS3/E3 output interface, 2 channel ASI-A ... input,meets G.703 standard,BNC,impedance 75ΩE1×N InputoptionalE1×N input,N=1,2,3,4 Meets G.703 standard,BNC,impedance ... clock input1 channel 10MHz input,BNC,AC coupling,impedance 50Ω1 channel 1pps input,BNC,TTL level,impedance 50ΩOutput interfaceDS3 ...