9
6 RX For use on four-wire leased line
systems receiving line (R model only).
7 TX Transmits for four-wire leased lines,
transmits and receives for two-wire
leased lines (R model only).
8 TX Transmits for four-wire leased lines,
transmits and receives for two-wire
leased lines (R model only).
RS-232 port
This port is for uploading firmware and configuring the control
card. Use a RS-232 serial cable to connect to a PC.
Power S witch
The power switch turns the rack and all of its modems on or off.
DC Power Terminals
The DC power terminals connect a DC-48V power source to the
rack.
AC-DC switch
The AC-DC switch selects which power supply the rack uses.
Fuse
The 4 A, 250 V AC fuse provides over current protection to the
rack, power supply, and all of its modems.
Power Socket
The power socket connects the power cord to the power supply.