... G.811 requires a reference clock source, you can use in the digital switch , SONET and SDH ... to implement integrated systems management and monitoring. Features:Clock output: 10MHz, 2.048Mb/s(E1), 2. ... 1pps, IRIG-B, RS232, RS422, RS485We configure clock output according to the different demand. For example, ... power supply: AC220V, DC48V, 24V, 12V Antenna cable extension CC81131:Synchronous Clock System