Hardware Reference
11
C613-03022-00 REV F
Figure 7: BRI S/T loopback plug.
For more information on the Test Facility’s operation, see the
Test Facility
chapter of the Software Reference for your switch or router.
To test a specific AT-AR041 or AT-AR042 interface, insert a BRI S/T loopback
plug into the interface and enter the command:
ENABLE TEST INTERFACE=BRI
n
where
n
is the interface number.
To test all AT-AR041 or AT-AR042 interfaces at once, insert BRI S/T loopback
plugs into all NSM BRI interfaces and enter the command:
ENABLE TEST INTERFACE=EXPANSION
In both cases the tests will run for 4 minutes.
Test results are displayed with the command:
SHOW TEST
which produces a display like that shown in Figure 8 on page 12.
The status of the tests for each interface will be shown in the right-most column
of the output. For more information on the meanings of the other figures, see
the
Test Facility
chapter of the Software Reference for your switch or router.
If you are unsure about running the Test Facility, or have difficulty evaluating
the results, contact your Authorised Allied Telesyn distributor or reseller.
BRI Loopback Plug (RJ45 connector)
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Switch end view
of plug
Not connected
Not connected
Not connected
Not connected
TX+
RX+
RX-
TX-
BRILOOPsw
