User`s guide

Performing Loopback Modes and Pattern Tests
6-14
7800-A2-GB26-80
May 1999
Starting Tests
Pattern tests can test one end of a circuit or both ends of a circuit. This section
describes how to use each of these methods.
To test one end of a circuit, you must have a device (Device A) send a pattern to
another device (Device B), where Device B monitors the integrity of the pattern
and tests one end of a circuit as shown in the following figure.
Sending a
Test Pattern
Monitoring a
Test Pattern
DEVICE A
DEVICE B
T1
NETWORK
496-15093
" Procedure
To test one end of a circuit:
1. Double-click on Device A to bring up the Device Display.
2. Click on a device interface.
3. Click on the Tests button. A dialog appears.
4. Choose a pattern to send to Device B from the dialog that is displayed.
5. Double-click on Device B to access a representation of the device.
6. Select the interface through which Device B is communicating with Device A
by clicking on its symbol.
7. Click on the Diagnose menu and select Tests. A Loopback and Pattern Tests
dialog appears.
8. Choose a monitor pattern from the list to check the progress and results of
the tests.
The results of the pattern test are displayed in the Results message area. See
Checking the Pattern Test Results on page 6-16.