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12 Network Service Module
C613-03022-00 REV K
Testing an AT-AR041 or AT-AR042 NSM
The Test Facility is built into the AlliedWare operating system, and is the best
method to verify the correct operation of the BRI interfaces on the AT-AR041
and AT-AR042 NSMs. Testing can be performed while the switch or router is
operational, but any interfaces being tested are dedicated to the Test Facility.
For more information about the Test Facility, see the Test Facility chapter of the
AlliedWare
®
Operating System Software Reference.
When testing BRI interfaces using the Test Facility, a loopback plug must be
inserted into each interface being tested. The loopback plug connects the
output pins on the interface to the input pins so that any data transmitted over
the interface is looped back (hence loopback plug) and received at the same
interface. Figure 7 on page 12 shows how to construct loopback plug to test the
BRI interfaces.
Figure 7: BRI S/T loopback plug
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=brin
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
Tests run for 4 minutes. Test status and results can be viewed at any time, using
the command:
show test
which produces a display like that shown in Figure 8 on page 13.
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 Fa cilit y chapter of the AlliedWare
®
Operating System 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 Telesis distributor or reseller.
BRI Loopback Plug (RJ45 connector)
1
2
3
4
5
6
7
8
12345678
Switch end view
of plug
Not connected
Not connected
Not connected
Not connected
TX+
RX+
RX-
TX-
BRILOOPsw