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Contact the network operator or the supplier of the PBX
equipment and ask them to test your access circuit.
The BERT can be performed in three different ways:
1. BERT in an extended call to oneself
A remote number is not needed, since the ISDN
connection is setup to oneself. In this case, the ARGUS
requires two B-channels for the test.
2. BERT with a loopbox
A loopbox (e.g., another member of the ARGUS family
of testers at the remote end) is required.
The test uses one B-channel.
3. BERT end-to-end
This test requires a waiting remote tester such as an
ARGUS in the BERT wait mode .(see page 66 BERT
wait) A bit pattern is sent to this tester.
Independent of the received bit pattern, the remote
tester uses the same algorithm to generate a bit-pattern
that it sends back.
Therefore, both directions are tested independently.
ARGUS 3u plus/3u NT
9 Single Tests
59
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