MDS SD9P ES A Band 820-870 MHz SD9P-MDAESNC11N Redundant Protected SD9 transceivers (9710 Emulation) With 1 Antenna Port. Includes two SD-MS 900 MHz (12 VDC) With 1 Antenna Port managed radios. Programmable RS232/485. Includes authorization for remote management acces. (Serial Only 1 port) With 1 Antenna Port 400 MHz (12 VDC) With 1 Antenna Port Licensed Managed Serial Licensed Radio 5 watt, 10v-30vdc with data rates to 19.2 Kbps at max range of 50 miles, sensitivity of -112 at 1x10-6 BER. with 1 Active Serial Port. High speed, up to 65 Kbps in 50 KHz channel. Programmable RS232/485. Includes authorization for remote management acces. Defaults to 4710 emulation mode. Temperature range of -140 to 158 degrees fahrenheit. The MDS SDxP incorporates two MDS SD transceivers and power supplies with automatic or manual switchover capability. On detection of a failure, the MDS SDxP switches immediately to the standby transceiver. The switchover occurs for selectable transceiver alarm conditions. Switchover also occurs when no valid packets are received in a time frame of 1–30 minutes, or upon loss of power to the operating radio. An internal backup battery is provided in AC-powered models for continued operation during a loss of primary power.