Cyan Z-Series Engineering and Planning Guide Release 5.0
700-0023-05-00 Rev. 1 © 2013 Cyan, Inc. – All Rights Reserved. Page 49
2.1 LAD Modules
The 2-channel, 4-channel, 8-channel, and 40-channel Cyan Z-Series Lambda Add/Drop (LAD) 100 GHz
modules provide DWDM connectivity using thin film filter technology and optional EDFA amplification.
The modules utilize standard ITU 100 GHz channel spacing. An environmentally hardened 8-channel
module (LAD-8i) is also available for deployments in remote cabinets with the Cyan Z33 I-Temp shelf.
LAD modules provide an Optical Supervisory Channel (OSC) 100Base-FX Ethernet management channel.
The purpose of the Ethernet management channel is inter-node communication, but it can also be used to
carry other management traffic from third-party systems if an out-of-band DCN network is required.
Note: The LAD-2P and LAD-2G modules, deployed in Z22 systems, do not provide an OSC. In Z22
configurations, the PME-216i line card has an in-band management channel to provide inter-node
communication.
Several versions of the optical LAD modules are available:
• LAD-2P: 2-channel (I-Temp)
Note: The LAD-2P module provides East and West DWDM add/drop channels and standard
1310nm add/drop ports for the Z22 shelf.
• LAD-2G 2-channel (I-Temp)
Note: The LAD-2G module provides three long-reach wavelengths; East and West DWDM
add/drop channels and standard 1550nm add/drop ports for the Z22 shelf.
• LAD-4: 4-channel
• LAD-4A: 4-channel with booster amplifier
• LAD-8: 8-channel
• LAD-8i: 8-channel (I-Temp)
• LAD-8A: 8-channel with booster amplifier
• LAD-8E: 8-channel with pre-amp and booster amplifier
• LAD-8X: 8-channel with pre-amp and booster amplifier (40dB reach)
• LAD-40: 40-channel
• LAD-40E: 40-channel with pre-amp and booster amplifier
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