
294 Maintenance
Enterprise Edge 2.0 Programming Operations Guide P0911588 Issue 01
Tests
Enterprise Edge allows you to run tests to verify the integrity of the installation
wiring for the telephone sets. Before you run any tests, use the procedure, DN-to-
port conversion on page 296, to determine the port associated with a particular DN.
The following messages may appear on the Alarm Telephone during Loopback
tests.
You can start andstop Loopback tests under the Diagnostics heading. Run only one
test at a time on an EE-DTM. You can move on to another programming task while
the loopback test is running. While the loopback test is running, the green “in
Service” LED on the EE-DTM flashes.
If you administer the internal CSU on a line loopback and payload loopback, then
the central office can also invoke and stop tests. In order to be able to run a payload
loopback test, you must configure the EE-DTM for extended superframe format.
The Enterprise Edge system allows you to run the following tests:
• Line loopback test on page 294
• Payload loopback test on page 295
• Card loopback test on page 295
• Continuity loopback test on page 295
Use the procedure, Start a loopback test on page 296, to run any of these tests.
Line loopback test
The line loopback test loops the full 1.544 Mbps signal received from the network
back to the network. The looped signal regenerates without any change in the
framing format and without the removal of any bipolar violations. The line
loopback test can also be invoked and stopped remotely using the in-band signal or
via the facility data link (FDL) in extended super frame (ESF) format.
The line loopback test must be run in coordination with the T1 or PRI service
provider. Some test patterns can cause the EE-DTM to reset. To avoid this, start the
line loopback test from your system before the T1 or PRI service provider begins
their test, and stop the line loopback test from your system after the T1 or PRI
service provider ends their test.
Choose an appropriate time to run tests.
A good time to run tests is after office hours.
Message Explanation
EVT: 210-YYYZ
Loopback test YYY on Trunk module Z has started
EVT: 211-YYYZ Loopback test YYY on Trunk module Z has ended
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