Ness EDSR400M Instruction Manual page 21

LAN
LAN Connector : The RJ-45 LAN connector.
7
RS232
RS232 connector : Connect D-Sub 9 pins connector to RS232 ports for remote control
8
RS485
RS485 connector : RJ 45 Connector to Cascade multi Digital Video Recorder.
9
FAN: Cooling FAN.
10
BACK PANEL CONNECTIONS
7