Constellation™ November 2003
11-30 Field-Replaceable Units
Removing the HLM-3xDS3/4xDS3
• In a MHSB configuration, start with
step 1
.
• In a nonprotected configuration, start with
step 2
.
In a nonprotected configuration, removing the
HLM-3xDS3/4xDS3 is a service-affecting
procedure.
1. Use the Keypad command to lock traffic on to the HLM that is not being
removed. This step causes a minor alarm.
CONTROL > LOCK/IF LPBK > LOCK HLM, SET
2. Disconnect the cables by pulling the connectors straight out from the
HLM-3xDS3/4xDS3.
3. Use the 2 extractor tabs to unlock the HLM from the shelf.
4. Carefully pull out the HLM from the shelf.
Installing the HLM-3xDS3/4xDS3
1. Check the part number of the HLM-3xDS3/4xDS3 to ensure that the
correct unit is being installed.
2. Ensure that the 2 extractors are in the unlocked position.
3. Carefully slide the HLM-3xDS3/4xDS3 into the designated slot in the shelf
until the unit plugs into the backplane.
4. Use the 2 extractor tabs to lock the unit into place.
5. Reconnect the cables. Ensure that the cables match the connector labels.
MHSB System
Use the Keypad command to take the switched unit out of lock status.
CONTROL > LOCK/IF LPBK > LOCK HLM, CLR
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