Allied Telesis AR Series Hardware Reference Manual page 51

Hardware Reference
C613-03031-01 REV E
The SHOW SYSTEM command displays the state of the main power supply
and fan, and whether or not the RPS is being monitored. If RPS monitoring is
enabled, it also shows whether an RPS is connected, and the state of its output
voltage and fan.
When a fault occurs in the main power supply or fan, system LEDs on the
AT-AR745's front and back panels are flashed in a pattern that identifies the
fault (Table 22 on page 50). If RPS monitoring is enabled, the system LEDs also
flash to indicate failures in the RPS connection, power supply or fan. Multiple
faults are indicated by cycling through each error code.
The Main System
Main features of the AT-AR745 base CPU card are:
80 MHz RISC processor.
1 MByte of EPROM.
128 MBytes of synchronous DRAM (DIMM module).
16 MBytes of flash memory.
128 KBytes of battery backed SRAM.
2 x 10/100 Mbps autosensing Ethernet LAN ports.
2 RS-232 asynchronous serial ports.
2 PIC bays.
1 hot swappable Network Service Module (NSM) bay.
1 PAC slot for PAC compression and/or encryption cards.
Redundant power supply (RPS) and -48V DC power supply options.
Figure 22 on page 52 shows the location of the main components on the
AT-AR745 base CPU card. There are no user-selectable jumpers or DIP
switches.
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