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DS3 terminating equipment loopback testing (LNW80 switch and LNW59 without optics)

Perform this test when the Alcatel-Lucent 1665 DMX is equipped with LNW80 switch

packs or LNW59 without optics in the main slots.

Facility Loopback testing allows the installer to verify the electrical cabling to the Alcatel-

Lucent 1665 DMX NE. Follow the procedure below to perform a facility loopback test at

the Alcatel-Lucent 1665 DMX shelf. When the Alcatel-Lucent 1665 DMX is cabled to

other DS3 terminating equipment, in order to complete the loopback testing, it will be

necessary to contact the Customer Network Control Center and have a signal established

at the port(s) under test.

To test cabling to the DSX-3, use a DS3 test set to transmit and receive toward the facility

loopback.

Perform the following tests for each DS3 circuit cabled to the Alcatel-Lucent 1665 DMX.

Select Fault -> Analysis -> Loopback...

Choose the DS3 port to test and click Select.

Select Operate and Loopback Type: Facility and click Apply.

Once the loopback is up, a test signal shall be generated at the DS3 terminating equipment

which will verify that the cabling is correct.

Note:

loopback.

While observing the error-free transmission, grasp the DS3 cable about two inches from

the BNC connector head and gently rotate (twist) the cable in a clockwise and counter

clockwise direction about 45 degrees (gently).

Result:

connector must be cut off and replaced.

If an error-free signal is not received:

Check the LBOs settings using

•

LBOs (p.

4 - 2 6

A test set can be applied at the DSX-3 to test cabling toward the facility

If any errors are detected while performing this "wiggle test," the BNC

4-6).

View -> Equipment

(see

DS3/EC1 and TMUX testing procedure

Setting DS3/EC1 and TMUX

365-372-304R7.1

Issue 2 March 2008

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