Allied Telesis AR Series Hardware Reference Manual page 27

Hardware Reference
C613-03031-01 REV E
All jumpers should be left in the factory default positions unless you are
advised otherwise by your authorised Allied Telesyn distributor or reseller.
Jumpers should only be replaced by authorised service personnel. Unauthorised
opening of the router lid may cause danger of injury from electric shock, damage
to the router, and invalidation of the product warranty.
Figure 9: Location of main components on the AT-AR300L(S), AT-AR300(S), and
AT-AR310(S) base CPU cards.
RJ45
CONFIG
J1 J2
BRI 0
ISDN RX TERMINATION
ISDN TX
TERMINATION
REV
S/N
MAC CARD SLOT
BOOT EPROM
Table 11: Functions of the jumpers on the AT-AR300L(S), AT-AR300(S), and
AT-AR310(S) base CPU cards.
Jumper Function
J1 BRI Tx termination.
J2 BRI Rx termination
DB9
RJ45
PC HUB
ASYNCHRONOUS
MDX
PORT 0
ETHERNET 0
LAN
Link Txd Coll Rxd
Factory Default
Not installed (no termination).
Not installed (no termination).
RJ11 RJ11
VOICE 0 VOICE 1
M2 M1
WARNING:
LITHIUM BATTERY
DO NOT DISPOSE IN FIRE
ISDN
System Run Power
B2 B1 Active
300CPU
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