............................................................................................................................................................................................................................................................

OC-48 facility loopback testing

Facility Loopback testing allows the installer to verify cabling to the OC-48 equipment.

This test is only required if the Alcatel-Lucent 1665 DMX shelf is connected to OC-48

equipment. If the shelf is NOT connected to OC-48 equipment, skip this section and

continue to the next chapter.

Note:

necessary for the testing.

The Function unit slot under test must contain an OC-48 (LNW31 or LNW402) circuit

pack in order to perform this test.

Log on to the Alcatel-Lucent 1665 DMX shelf using the CIT software as described in the

"Use of WaveStar

Select Configuration > Cross-Connections...

Use the Cross-Connection Wizard to enter a new cross-connection at the STS48 rate,

UPSR Ring Add/Drop, between m1-1-1 and fn-1-1 (fn will be a,b,c,d or g depending on

the slot where the OC-48 CP is located).

This command creates a cross-connect to map the first STS-48 of an OC-48 circuit pack to

the first STS-48 of the Main OLIUs.

Verify transmission at the patch panel. There should be no alarms at the test set.

Select Configuration > Cross-Connections...

Use the Cross-Connection Wizard to Delete leg(s) of an existing cross-connection

associated with CP main-1, Port 1 (the OC-48 cross-connection).

Verify loss of transmission at the patch panel. This should be evident by a SONET alarm

and a loss of pattern alarm.

Select Fault > Analysis > Loopback...

6 - 4 6

An optical test set with the capability to transmit OC-48 SONET levels are

CIT software" (p.

5-6).

OC-48 (low-speed) testing

Alcatel-Lucent 1665 DMX R9.0

365-372-304R9.0 Issue 2

July 2010

Table of Contents

Alcatel-Lucent 1665 Installation Manual page 256

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