ADTRAN TSU LT User Manual download pdf (Page 47)

TSU LT 220V User Manual Chapter 7 Test Menu

Test Pattern

Selects the test pattern and initiates the transmission of the pattern. There are five patterns available (see

below). End testing by selecting

NO PATTERN.

CLR Errors

CLR ERRORS has two functions. First, it clears out the 511 error total when you press ENTER. Second, it

displays a total of the 511 errors; that is, if 511 errors are being received, the display updates accordingly.

This function is useful in testing end-to-end integrity of the network. To do this, first, loop up the far end

TSU LT, and send a 511 pattern from the local TSU LT. Then, view the

CLR ERRORS screen to determine

whether the link is functioning properly by verifying that no errors are being counted.

Insert 511 Errors

When running a 511 pattern test, press the ENTER key to insert an error into the 511 pattern.

RUN SELF-TEST

Use this menu to execute an internal self-test. This is the same self-test that is automatically performed at

power-up. After displaying

INITIALIZING, the LCD shows the results (including failures) of the self-test (see

Figure 7-3).

Figure 7-3. Self Test Results Screen

1:8 ALL DS0s

Generates a 1 in 8 pattern in all DS0s.

QRSS Active

DS0s

Generates a 4 QRSS test pattern and inserts the pattern into currently active

channels.

511 Active DS0s

Generates a 511 test pattern and inserts the pattern into currently active channels.

All Zeros

Generates an all zero's pattern in every channel.

All Ones

Generates an all one’s pattern in every channel.

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ADTRAN TSU LT User Manual Page 47