Multi-Tech Systems FR111 owner manual

loopback mode (DIP-Switch 3 DOWN). This tests the complete path through the MultiFRAD up to the line circuitry and back to the data port. When it is used in a remote trunk loopback test mode, the remote DSU (or the telephone company's central office, CO) would be put into loopback mode. This tests the integrity of the local data device, Multi- FRAD, and the frame relay network. The Remote Trunk Loopback test is the most sophisticated of the two tests.

Loop Tests

1 - Data Port Loopback

2 - Trunk Loopback

M - Main Menu

P - Previous Menu

Selection : _

The Data Port Loopback Test puts the MultiFRAD's data port in loopback mode. This means that any data that comes into the data port is immediately looped back out to the user device. Use this test to verify that the data port cable and its connections are OK, and that the MultiFRAD's data port settings are correct.

The Trunk Loopback Test is selected when the internal DSU is set for loopback mode (DIP-Switch 3 is DOWN). This tests the data port circuitry and the MultiFRAD's trunk circuitry up the DDS line circuit.

The methodology for all of the tests is the same:

1.Put the MultiFRAD (either the local or remote one) into the desired test mode.

2.Connect the user device to the data port of the local MultiFRAD.

3.Send data from the user device.

4.Verify that the data received from the MultiFRAD matches exactly what was sent.

5.If the data received is the same as the data sent, then the test passed. If the data received is corrupted or no data is received, then the test failed. A failed test indicates a problem either with the cables, connections, or one of the units involved in the test. If the cause of the failure is not readily apparent, try using the process of elimination to isolate the trouble spot(s). The tests are listed in order of complexity. If the Remote Trunk Loopback fails,

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