Cross-connection provisioning

Overview

Alcatel-Lucent 1665 DMX can be provisioned for signal routing. Depending on the application, VT1.5, STS-1, STS-3(c), STS-12(c), or STS-48(c) signal cross-connections may be established to route traffic in a specific manner. Cross-connections may be bidirectional or unidirectional.

Alcatel-Lucent 1665 DMX employs atomic cross-connections for all cross-connection provisioning. Atomic cross-connections are one-way cross-connections between logical ring channels which can be set up and taken down by a single command, and which cannot be broken down into smaller parts. Logical ring channels are the tributaries of a port or port protection group used for transmission in the absence of any line or equipment protection.

Atomic cross-connections are more flexible than the cross-connection provisioning structure employed previously. They allow for the support of more detailed applications because you are able to provision each portion of a cross-connection.

Typical cross-connections

Any VT1.5 or STS-n signal may be provisioned for the following signal routes:

• Main to Main

• Main to Function Unit.

• Hairpin (Function Unit to Function Unit).

Alcatel-Lucent 1665 DMX supports unidirectional cross-connections.

STS-1 cross-connections to Ethernet interfaces are also available. The 1WAY and 1WAYPR cross-connection is used for UPSR point-to-point Ethernet applications. A 1WAY UNSWITCHED cross-connection is used for multipoint Ethernet applications.

The unidirectional pass-through cross-connection is used to pass VT1.5 or STS-n signals through the NE all on the same time slot. For pass-through cross-connections, the channel state default is NMON rather than AUTO as with other cross-connections.

OCH cross-connections

Alcatel-Lucent 1665 DMX also supports optical channel (OCH) cross-connections between dense wavelength division multiplexing (DWDM) compatible circuit packs/pluggable transmission modules. The OCH cross-connections are used to inform the network element about manual fiber connections.

The following OCH cross-connections are supported:

• DWDM-compatible OC-192 port to/from OCH port

• OTU2 port to/from OCH port

• Remote DWDM-compatible wavelength (remote shelf) to/from OCH port

• OCH port to/from OCH port (pass through)

Reference

For more information, see Cross-connections in Chapter 6, System planning and engineering.