Procedure 4-31: Add subshelf to multishelf Digital Cross-Connect System (DCS) application

- Overview

Use this procedure to add a DS1 or DS3 subshelf to an existing multishelf Digital Cross-Connect System (DCS) application.

The multishelf DCS application supports adding additional DS1 and DS3 (TMUX) I/O capacity to a Alcatel-Lucent 1665 DMX system by adding DS1 and/or DS3 subshelves, while maintaining the ability to externally manage the entire system using a single TID. The multishelf DCS configuration consists of one main shelf that supports up to the following maximum number of subshelves (based on equippage):

  • 12 DS1 subshelves (subshelves 2 - 13) and 1 DS3 subshelf (subshelf 14), or

  • 2 DS3 subshelves (subshelves 2 - 3)

The main shelf also supports all pre-existing functionality.

- DS1 subshelf

A DS1 subshelf supports up to 4 pairs of LNW801 56DS1/E1 circuit packs in the Function slots (Growth slots not used) and one pair of LNW48/50/54/203 OC-12 packs in the Main slots. If other circuit packs types are installed, the system reports an unexpected CP type alarm. The LNW801 circuit packs are configured for DS1 ports. E1 interfaces are not supported in this release. The OC-12 ports on the main circuit packs must be configured as a unidirectional nonrevertive 1+1 OC-12 protection group.

The cross-connections on the DS1 subshelves are fixed and provide nonblocking access in the main shelf to all 224 DS1 signals in the subshelf.

DS3 subshelf

A DS3 subshelf supports up to 4 pairs of LNW20 48TMUXDS3EC1 circuit packs in the Function slots (Growth slots not used) and one pair of LNW56/57/58/502 OC-192 packs in the Main slots. If other circuit packs types are installed, the system reports an unexpected CP type alarm. The ports on the LNW20 48TMUXDS3EC1 circuit packs are configured as ported DS3 ports. Both channelized and unchannelized operation is supported. EC1 interfaces are not supported in the release. The OC-192 ports on the main packs are configured as a unidirectional non-revertive 1+1 OC-192 protection group.

The cross-connections on the DS3 subshelves are fixed and provide nonblocking access in the main shelf to all 192 DS3/5376 DS1 signals in the subshelf.

Main/subshelf provisioning restrictions

The following restrictions apply when provisioning the main shelf to recognize a subshelf in a multishelf DCS application.

  • The main shelf is recommended to be a Alcatel-Lucent 1665 DMX High Capacity Shelf (DMX-HC-20A, DMX-HC-30A, or DMX-HC-30A-CE Shelf Type).

  • The main shelf must be equipped with VLF OLIU circuit packs in the Main slots.

  • The subshelf MAC address must not be associated with another subshelf number.

  • The main shelf optical interface restrictions are:

    • Unidirectional non-revertive 1+1 OC-n protection group at a rate consistent with the specified subshelf type; OC-12 for a DS1 subshelf or OC-192 for a DS3 subshelf.

    • Not associated with another subshelf number.

    • Lines must not be provisioned line timing sources.

    • No cross-connections or test access connections on the tributaries of the main shelf optical interface.

    • Not an EDGE or ENNI port.

  • The main shelf must not already be provisioned as a subshelf.

  • The maximum number of subshelves is not exceeded.

The following restrictions apply when provisioning a standalone shelf to be a subshelf in a multishelf DCS application.

  • The shelf must be a Alcatel-Lucent 1665 DMX High Capacity Shelf (DMX-HC-20A, DMX-HC-30A, or DMX-HC-30A-CE Shelf Type).

  • There must be no loopbacks in the shelf.

  • There cannot be any cross-connections or test access connections in the shelf.

  • The shelf must be a stand-alone shelf.

Privilege level

You must log in as a Privileged or General Access user to complete this procedure.

- Before you begin

Before you begin this procedure:

  1. Refer to Laser safety and Electrostatic discharge in Chapter 1, Safety.

  2. Obtain the work instructions for this procedure.

  3. Verify that the work instructions specify the following required information to be used when provisioning the main shelf and subshelf to be added.

    • Subshelf number of the subshelf to be added (2 - 14)

    • Subshelf type (DS1 or DS3)

    • TID of the main shelf

    • MAC address of the subshelf SYSCTL circuit pack

    • 1+1 OC-n interface on the main shelf to be connected to the subshelf.

  4. Verify the TID of the main shelf. If required, at the main shelf select Administration → View NE Administration to obtain the NE Parameters.

  5. Verify the MAC address of the subshelf SYSCTL circuit pack. To obtain the subshelf NE Parameters, select Administration → View NE Administration . The MAC address is the unique system ID field within the network element OSI NSAP address.

Steps

Complete the following steps to add a DS1 or DS3 subshelf to a shelf. The shelf can be a stand-alone shelf or a main shelf in an existing multi-shelf DCS system.

 
1

If required, equip a new Alcatel-Lucent 1665 DMX standalone shelf as a DS1 or DS3 subshelf.

Reference:

2

Important!

The LNW55 OC3/OC12/OC48 circuit pack supports OC-12 lines connecting up to 12 DS1 subshelves.

The LNW82 OC3/OC12/OC48 OLIU circuit pack may support OC-12 lines connecting up to eight DS1 subshelves.

The LNW59 OC-192 circuit pack supports OC-192 lines connecting up to two DS3 subshelves.

The LNW504 OC-48/OC-192 circuit pack supports up to 4 OC-192 lines, two of which may be connected to DS3 subshelves.

Any low-speed OLIU circuit pack in the main shelf which supports the required interface rate may be used for a subshelf interface. However, using an OLIU circuit pack in the Growth slots maximizes the number of slots available for electrical packs with external backplane interfaces (DS1, DS3, TMUX).

At the main shelf, select View → Equipment and verify that the required OC-12 interface is available to add a DS1 subshelf or OC-192 interface is available to add a DS3 subshelf.

If required, install the necessary OLIU circuit packs and/or pluggable transmission modules at the main shelf.

Reference:

3

Important!

Unidirectional, nonrevertive, 1+1 OC-12 lines are required to connect the main shelf and a DS1 subshelf.

Unidirectional, nonrevertive, 1+1 OC-192 lines are required to connect the main shelf and a DS3 subshelf.

Establish the required unidirectional, nonrevertive, 1+1 OC-n line between the main shelf and each DS1 and/or DS3 subshelf.

Reference:

Procedure 9-1: Establish high-speed end-to-end Alcatel-Lucent 1665 DMX network

4

Important!

The intershelf control communications link between the main shelf and each subshelf requires an external 100Mb hub connecting the DLAN connectors of the main shelf and each subshelf.

Connect the DLAN connector on the back of the subshelf to the required external 100 Mb hub. No special cable is required.

5

Important!

The Command Mode parameter must be provisioned Main.

At the main shelf, select Configuration → Create Subshelf to provision the main shelf to add the required DS1 or DS3 subshelf.

6

Important!

The Command Mode parameter must be provisioned Subshelf.

At the DS1 or DS3 subshelf, select Configuration → Create Subshelf to provision the required DS1 or DS3 subshelf parameters.

Result:

You will be logged off the system during the controller reset.

A flashing b in the IND display on the SYSCTL indicates that a boot is in progress. During the boot, the b may extinguish for up to 20 seconds and then resume flashing.

End of steps

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