Hardware Reference
25
C613-03031-01 REV E
The Main System
The main features of the AR300 Series base CPU card are:
■
68360 processor.
■
512K of EPROM.
■
8 MBytes of DRAM.
■
2 MBytes of flash memory.
■
1 or 2 Ethernet LAN 10BASE-T ports.
■
1 or 2 RS-232 asynchronous serial ports.
■
1 Basic Rate ISDN S/T port, on models AT-AR300L(S), AT-AR300(S) and
AT-AR310(S).
■
1 Basic Rate ISDN U interface port on model AT-AR370(U).
■
1 G.703/Primary Rate ISDN port, on models AT-AR390 and AT-AR395.
■
1 high speed synchronous serial port, on models AT-AR350, AT-AR370(S),
and AR370(U).
■
0, 2, or 4 analogue voice ports.
■
1 MAC compression/encryption card slot.
The asynchronous serial ports can be used as general purpose ports for
terminals, printers, or modems. Port 0 can optionally be used for diagnostics or
can automatically output the router start-up messages, by altering the DIP
switch settings described in Table 10 on page 26.
Table 9: Functions of the front and rear panel LEDs on the AT-AR390 and AT-AR395
routers.
LED
Function
LAN Link
Lit when the Ethernet interface is connected to a device (e.g., a hub),
which is generating link pulses. This LED is normally lit.
LAN Txd
Lit when data is being transmitted over the Ethernet interface.
LAN Coll (yellow)
Lit when a collision is detected on the Ethernet interface.
LAN Rxd
Lit when data is being received on the Ethernet interface.
WAN Rxd
Lit when data is being transmitted over the G.703/PRI ISDN interface.
WAN Txd
Lit when data is being transmitted over the G.703/PRI ISDN interface.
WAN Active
Lit whenever operational (i.e., no RAI or AIS set) frames are being
received on the G.703/PRI ISDN interface.
System (red)
This LED is not normally lit. It is used to signal various system conditions
(e.g., when the processor executes the reboot sequence). Generally it
signals a possible fault condition, but it will light briefly during power-
up and operator initiated reboot.
Run
Lit when the internal processor is executing code. If the processor stops
for any reason (a fault condition), then the LED will not be lit.
Power
Lit when power is supplied and the router is switched on.
120
Ω
(rear panel) Lit when the 120
Ω
interface type is selected via the push button.
