Ethernet-Connected Device Server DeviceMaster RTS 4-Port RJ45 DeviceMaster device servers provide real-time， programmable platforms for connecting up to 32 serial devices per unit andcommunicating via 10/100Base-T Ethernet connections. These products feature remote configuration and management， andenhanced reliability through an on-board Webserver， PortVisionR Plus management software， and a real-time clock/watchdog tomonitor processing activity and restart the DeviceMaster in the event of an application hang-up. Serial ports can be addressed asCOM/TTY ports with Comtrols NS-Link? software (included) or as TCP/IP sockets， and serial connections can be made betweentwo units over Ethernet. The RTS family is RS-232/422/485 software-selectable， has an operating temperature range of -37° to74°C