... network-level node clock 1,2.CC81231 can be widely used in radio and television, cluster communication, the time and frequency ... code 4, XS8 three core plug AirlinesSerial interface, GPS status, system information GPS raw data interface, 1, DB-9 ,9600-N-8-1 ... System Monitoring Interface, 1, DB-9 ,9600-N-8 ...