Design and implementation of E1 network interface in synchronized class cipher machine

This paper proposes an implementation of E1 network interface. On the base of introducing the features of MSP430F149 and DS21348, it shows the hardware connection diagram. In order to exchange data correctly and synchronize completely, it sets the control registers of DS21348 properly. This design can complete the functions that recovery the clock and data from the lines enable jitter attenuator, transmit data and so on.