Service manual

4
Repair Procedures - EFCM Basic Edition
4-19
Repair Information
When the test completes, the Diagnostics - Executing View reverts
to the Diagnostics View. Test results appear as Passed, Failed, or
Test Incomplete in the message area of the view.
5. Reset the tested port:
a. Select Ports and Reset from the Maintenance menu at any view.
The Reset View appears.
b. For the tested port, click (enable) the check box in the Reset
column. A check mark in the box indicates the port reset
option is enabled.
c. Click OK. The port resets.
6. Inform the customer that the test is complete and the attached
device can be set online.
External Loopback
Test
An external loopback test checks all port circuitry, including
fiber-optic components of the installed optical transceiver. To
perform the test, the attached device must be quiesced and
disconnected from the port, and a multimode loopback plug must be
inserted in the port.
Inform the customer a disruptive external loopback test is to be
performed and the attached device must be disconnected.
To perform the test, use the following steps:
1. Disconnect the fiber-optic jumper cable from the port to be tested.
2. Insert a multimode loopback plug into the port receptacle.
3. Select Ports and Diagnostics from the Maintenance menu
(Maintenance>Diagnostics). The Diagnostics View appears
(Figure 4-4).
4. Type the port number to be tested in the Targeted Port Number
field.
5. Select the External Loopback option at the Diagnostic Test list box .
6. Click Start. The test begins and:
a. The Diagnostics View changes to a Diagnostics -Executing View.
b. The message Diagnostics Time Remaining: xx appears,
where xx are the seconds remaining in the test. The test takes
approximately 30 seconds.