Procedure 10-15: Add optical channel (OCH) to DWDM network

- Overview

Use this procedure to add an optical channel (OCH) to a DWDM network.

Important!

This procedure assumes that the Alcatel-Lucent 1665 DMX shelf and network have been properly equipped and tested. If the Alcatel-Lucent 1665 DMX shelf has not been properly equipped, refer to Chapter 5, Node turnup procedures. If the DWDM network has not been properly configured, refer to Procedure 9-12: Establish DWDM network.

Supported optical channels/wavelengths

Alcatel-Lucent 1665 DMX supports DWDM wavelengths based on the industry standard ITU-T grid at 100-GHz spacing in the C band. The following optical channels and wavelengths are supported.

  • 9520 (195.20 THz)

  • 9530 (195.30 THz)

  • 9540 (195.40 THz)

  • 9550 (195.50 THz)

  • 9560 (195.60 THz)

  • 9570 (195.70 THz)

  • 9580 (195.80 THz)

  • 9590 (195.90 THz)

DWDM-compatible circuit packs

The following circuit packs are DWDM compatible:

  • LNW57 OC-192 OLIU (channel 9550)

  • LNW59 OC-192 OLIU with DWDM-compatible pluggable transmission modules (channels 9520 - 9590)

  • LNW60 OC-192 OLIU (channel 9550)

  • LNW502 OC-192 OLIU with DWDM-compatible pluggable transmission modules (channels 9520 - 9590)

  • LNW504 OC-48/OC-192 OLIU with DWDM-compatible pluggable transmission modules (channels 9520 - 9590)

  • LNW554 tunable OC-192 OLIU (channels 9520, 9530, 9540, 9550)

  • LNW555 OC-192 OLIU (channel 9550)

  • LNW603 OC-192 OLIU with DWDM-compatible pluggable transmission modules (channels 9520 - 9590)

  • LNW705 XM10G/8 Muxponder with DWDM-compatible pluggable transmission modules (channels 9520 - 9590)

Compatible DWDM optical signals that are terminated by other network elements are also supported (alien wavelengths).

- Privilege level

You must login as either a Privileged or General user to complete this procedure.

- Before you begin

Prior to performing this procedure:

  1. Refer to Before you begin and Required equipment in this chapter.

  2. Refer to Electrostatic discharge in Chapter 1, Safety.

  3. Obtain the work instructions for this procedure.

  4. Verify that the work instructions specify the terminating nodes, pass-through nodes (if required), add/drop optical port addresses, Optical Channel (OCH) port addresses, the OCH port parameters to provision, and the OCH cross-connections to be established.

Steps

Complete the following steps to add an optical channel (OCH) to a DWDM network.

 
1

Using the work instructions, determine the DWDM network configuration and identify the terminating nodes and pass-through nodes (if required) for the optical channel being added.

Important!

It may be helpful to make a sketch of the DWDM network to visualize the path of the optical channel through the network.

2

At the terminating and pass-through nodes (if required), click the Alarm List button to obtain an NE Alarm List and verify that no alarms are present. Clear all alarms before continuing this procedure.

Reference:

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

3

Important!

The Expected Frequency of the DWDM-compatible optics on a PTM-based OLIU, non-PTM-based OLIU, or the OTU2 port of an XM10G/8 circuit pack must match the OCH port frequency. If the Expected Frequency of the of the DWDM-compatible optics and the OCH port frequency are different, attempts to provision an OCH cross-connection will be denied.

The frequencies are not compared if the DWDM compatible signal is terminated by a different network element (alien wavelength).

If terminating nodes are equipped with...

Then...

add/drop OLIUs with DWDM-compatible pluggable transmission modules,

At the terminating nodes, select View → Equipment to access the required add/drop DWDM pluggable transmission module and verify that the provisioned Expected Frequency matches the OCH port frequency.

If the frequencies do not match, verify the work instructions and resolve mismatch according to local procedures.

If required, select Configuration → Equipment to access the required add/drop DWDM pluggable transmission module and perform additional provisioning.

non-PTM based, DWDM-compatible add/drop OLIUs,

At the terminating nodes, select View → Equipment to access the required add/drop optical port and verify that the Expected Frequency matches the OCH port frequency.

If the frequencies do not match, verify the work instructions and resolve mismatch according to local procedures.

tunable add/drop OLIUs,

At the terminating nodes, select View → Equipment to access the required tunable add/drop optical port and verify that the provisioned Selected Wavelength (frequency) matches the OCH port frequency.

If the frequencies do not match, verify the work instructions and resolve mismatch according to local procedures.

If required, select Configuration → Equipment to access the required tunable add/drop optical port and perform additional provisioning.

Reference:

4

Important!

OCH cross-connections are established between a DWDM-compatible OC-192 OLIU add/drop optical port and an OCH port with the same frequency or between the XM10G/8 OTU2 port and an OCH port with the same frequency. The OCH cross-connections are used to inform the network element about manual fiber connections. This allows the network element to enable alarm reporting and variable optical attenuators. The variable optical attenuators are enabled only when an OCH port is the destination of an OCH cross-connection. When an OCH port is the destination of an OCH cross-connection the OCH port state also transitions from no state to the AUTO state.

At the terminating and pass-through nodes (if required), select Configuration → OCH Cross-Connections to access the OCH Cross-Connection Wizard and provision the required OCH cross-connections.

Result:

If the OCH port is the destination of an OCH cross-connection, then the variable optical attenuator and alarm reporting are enabled for the OCH port. The OCH port also transitions from no state to AUTO.

5

At the terminating and pass-through nodes (if required), select View → Equipment to access the required OCH ports and verify that the OCH port parameters are provisioned correctly.

If required, select Configuration → Equipment to access the required OCH ports and perform additional provisioning.

Reference:

Procedure 4-27: Provision optical channel (OCH) port

6

Important!

Attenuation is not required at the OMD circuit pack OCH port IN connectors. The circuit pack is equipped with variable optical attenuators and automatic optical power balancing to control the optical power of individual optical channels.

At both terminating nodes, perform the following to connect the optical fibers between the OCH port and the DWDM-compatible OC-192 OLIU add/drop optical port or XM10G/8 OTU2 port.

  • Clean and connect the optical fibers to the required OUT connectors on the OMD circuit pack and the add/drop optical/OTU2 port.

  • Measure the optical receive power of the optical fiber at the add/drop optical/OTU2 port using an optical power meter. Select the appropriate LBO to attenuate the receive signal to the middle of the allowable optical receive power range. (Refer to the Alcatel-Lucent 1665 Data Multiplexer (DMX) Applications and Planning Guide, 365-372-300, for the SONET optical specifications of the OLIU circuit packs and pluggable transmission modules.)

  • Clean and connect the optical fibers to the required IN connectors on the OMD circuit pack and the add/drop optical/OTU2 port.

Reference:

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

7

At the terminating and pass-through nodes (if required), perform end-to-end OCH line test.

Reference:

Procedure 14-37: Perform end-to-end optical line test on DWDM line

8

Important!

If the Port Monitoring Mode is provisioned to NMON, the OCH port is not monitored/alarmed and the OCH port will not automatically transition to the IS (in-service) state when a good signal (not LOS) is detected. If the Port Monitoring Mode is provisioned to AUTO, the OCH port automatically transitions to the IS (in-service) state when a good signal (not LOS) is detected, and the OCH port is monitored/alarmed. If the Port Monitoring Mode is provisioned to IS, the OCH port is monitored and alarms are reported.

At the terminating and pass-through nodes (if required), select View → Equipment to access the required OCH ports and verify the value of the Port Monitoring Mode parameter.

If required, select Configuration → Equipment to access OCH ports and change the value of the Port Monitoring Mode parameter.

Reference:

Procedure 4-27: Provision optical channel (OCH) port

End of steps

November 2011Copyright © 2011 Alcatel-Lucent. All rights reserved.