Northern UTA220/UTA220k Diagnostic Status Display, Front Panel Keypad Test, View Diagnostic Code

Diagnostics

To initiate the test, select the BILATERAL LOOPBACK option from the PORT TEST submenu. The UTA220 can be on-line or off-line when the test is initiated but a call must be placed before the unit can loop B-channel data. Any protocol, mode, and DTE rate can be used, however, the protocol and DTE rates on the two units must be compatible. The remote unit should be set to the same rate adaptation protocol as the local UTA220 and left in normal data mode (NOT placed in Bilateral test mode). Data sent by the remote UTA220 will be received by the local UTA220 then echoed back to the remote UTA220. The test is successful if the data is successfully echoed back to the sender. A BERT device can be helpful in checking for data errors.

Also, data from the local DTE will be echoed back to the DTE. The DTE portion of the test verifies the operation of the DTE, the DTE cable, the DTE interface to the UTA220, and the data buffers in the UTA220.

The test should be run in both directions if possible (i.e., use the local UTA220 as both the sending unit and as the loopback unit). If the B-channel data test is successful, it indicates that the local and remote units and the network are functioning. If there are errors, the problem could be in any of those elements.

DIAGNOSTIC STATUS DISPLAY

The UTA220 LCD can display a status screen that provides diagnostic information concerning the state of the UTA220 and the link. The status displays are found under the DIAGNOSTIC OPTIONS menu and are described below.

Front Panel Keypad Test

This test allows you to verify the functioning of the front panel buttons. After this test is begun, press each key. The key legend will be displayed on the LCD when the key is pressed. The * (UTA220k) or “HOME” (UTA220) key ends the test.

View Product Information

Displays software checksum, self-check status, PC board number and the software revision code.

View Diagnostic Code

This display is for factory use.

14-6 UTA220/UTA220k