Important!

The example assumes that the BLSR network is established using the Main slot pairs of Alcatel-Lucent 1665 DMX nodes. However, a Function/Growth slots pair may also be used to interface with an OC-48 BLSR.

Identify the node to be discontinued, the adjacent West node, and the adjacent East node. (Refer to the following figure.)

Legend:

Line 1W: Line 1W (West port) is the port in slot 1 of the 2F BLSR protection group (for example, Main-1 or FN-A-1).

Line 1E: Line 1E (East port) is the port in slot 2 of the 2F BLSR protection group (for example, Main-2 or FN-A-2).

Important!

The Force to Protection, Ring switch may cause transmission hits (less than 60 ms).

Perform the following: (Refer to the following figure.)

• At the West Node, from the System View menu select Fault → Protection Switch. Select the required 2F BLSR protection group (according to the work instructions) and perform a protection switch in the East direction with switch type Force to Protection, Ring. Click Apply. A dialog box appears asking you to confirm executing this command. Click Yes. After the protection switch completes, click Close.

• At the East Node, from the System View menu select Fault → Protection Switch. Select the required 2F BLSR protection group (according to the work instructions) and perform a protection switch in the West direction with switch type Force to Protection, Ring. Click Apply. A dialog box appears asking you to confirm executing this command. Click Yes. After the protection switch completes, click Close.

Legend:

Line 1W: Line 1W (West port) is the port in slot 1 of the 2F BLSR protection group (for example, Main-1 or FN-A-1).

Line 1E: Line 1E (East port) is the port in slot 2 of the 2F BLSR protection group (for example, Main-2 or FN-A-2).

NOTICE Service-disruption hazard

Removal of wrong fiber connections will result in a service interruption.

Ensure that you remove only the fiber connections for the optical span being discontinued.

Perform the following: (Refer to the following figure.)

• At the adjacent West Node, disconnect the optical fibers connected to the node to be discontinued.

• At the node to be discontinued, disconnect the optical fibers connected to the adjacent East Node and West Node.

• At the adjacent East Node disconnect the optical fibers connected to the node to be discontinued.

Legend:

Line 1W: Line 1W (West port) is the port in slot 1 of the 2F BLSR protection group (for example, Main-1 or FN-A-1).

Line 1E: Line 1E (East port) is the port in slot 2 of the 2F BLSR protection group (for example, Main-2 or FN-A-2).

Perform the following: (Refer to the following figure.)

• At the West and East nodes, connect the transmit fiber.

• At the West and East nodes, measure the optical power level in the receive direction and attenuate if necessary.

• At the West and East nodes, connect the receive fiber.

Refer to Procedure 14-4: Perform connection and verification of optical facility.

Legend:

Line 1W: Line 1W (West port) is the port in slot 1 of the 2F BLSR protection group (for example, Main-1 or FN-A-1).

Line 1E: Line 1E (East port) is the port in slot 2 of the 2F BLSR protection group (for example, Main-2 or FN-A-2).

If Automatic Ring Discovery is disabled at the remaining nodes in the ring, activate the manual ring maps.

Select Configuration → Activate Manual Ring Map. Select the required Ring ID and click Select.

Result:

A dialog box appears asking you to confirm activating the manual ring map. Click OK. The inactive manual ring map is now activated.

Perform the following:

• At the West Node, from the System View menu select Fault → Protection Switch. Select the required 2F BLSR protection group (according to the work instructions) and clear the protection switch in the East direction with switch type Clear. Click Apply. A dialog box appears asking you to confirm executing this command. Click Yes. After the protection switch completes, click Close.

• At the East Node, from the System View menu select Fault → Protection Switch. Select the required 2F BLSR protection group (according to the work instructions) and clear the protection switch in the West direction with switch type Clear. Click Apply. A dialog box appears asking you to confirm executing this command. Click Yes. After the protection switch completes, click Close.

Important!

The Clear switch may cause transmission hits (less than 60 ms). Wait for alarms to clear.

Result:

The node to be discontinued is now removed from the ring.

From the System View menu at the East and West nodes,

1. Select View → Protection.

2. Select the required 2F BLSR protection group and click Select.

3. Observe the Ring Node APS (Automatic Protection Switch) State, East Switch Request State, West Switch Request State, East Channel State, and West Channel State parameters. Verify that the protection switches have cleared and click Close.

To verify that no alarms are present in the network, click the Alarm List button at each node. If required, clear any alarms that are present.

Reference:

Alcatel-Lucent 1665 Data Multiplexer (DMX) Alarm Messages and Trouble Clearing Guide, 365-372-302

Is the removed shelf to be powered down?

If required to prevent alarms, provision the system Timing Mode parameter as Free Running using Configuration → Timing/Sync.

Reference:

Procedure 6-5: Network Element synchronization provisioning

If the shelf is being removed from service, select View → Cross-Connections to verify that there are no cross-connections on the shelf. If required, remove any existing cross-connection using Configuration → Cross-Connections.

Update the internal equipment list by either pressing the UPD/INIT push-button on the SYSCTL circuit pack or using Configuration → Update System → Update All.

To verify that no alarms are present, click the Alarm List button. If required, clear any alarms that are present.

Reference:

Alcatel-Lucent 1665 Data Multiplexer (DMX) Alarm Messages and Trouble Clearing Guide, 365-372-302

The Alcatel-Lucent 1665 DMX node is now removed from the bidirectional line switched ring (BLSR).

End of steps