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Cyan Z-Series Engineering and Planning Guide
Release 5.0
700-0023-05-00 Rev. 1
© 2013 Cyan, Inc. – All Rights Reserved.
P a g e
121
WSS Modules Paired with the AWG-40
Each WSS module requires an associated AWG-40 Array Wave Guide unit for add/drop traffic. Individual
wavelengths are added and/or dropped using the passive AWG-40 2
RU module. The AWG-40 module
allows multiplexing and de-multiplexing any of the 40 channels supported by the WSS. The AWG-40
module connects to the WSS COM port through a fiber jumper. The individual channels on the AWG-40
module are then connected to the appropriate Z-Series line card DWDM XFP transceiver or third-party
equipment using a fiber jumper.
AWG-40 Array Wave Guide
Figure 61: AWG-40 External Module
Dispersion Compensating Modules (DCMs) may be used to support the WSS module. The Cyan DCMs are
based on Fiber Bragg Gratings (FBGs) and exhibit lower loss than standard fiber-based DCMs. The DCMs
are housed in a standard LGX module, allowing three DCMs to be installed in a 1
RU, 19-inch rackmount
shelf/frame. The DCMs are connected to a WSS module Mid-stage port using a fiber jumper.
Note: If a DCM is required with a WSS module, you must use a Fiber Bragg Grating DCM. If a DCM
is not required for your configuration, a 3dB loopback attenuator must be connected to the WSS
Mid-stage port. The loopback attenuator is provided as part of the WSS-402 Fiber Jumper Kit and
the WSS-404 Fiber Jumper Kit.
The diagram below shows an example of WSS-402 modules, AWG-40 modules, and DTM-8 line cards in a
two-degree, East/West connectivity configuration.
DTM-8
Modules
WSS-402
Modules
AWG-40
Modules
East
West
Pass-Through
OOO Traffic
Add/Drop
Express
Traffic
W
es
t
Ea
st
West
Add/Drop
East
Add/Drop
WSS-402
WSS-402
AWG-40
AWG-40
Figure 62: Z77 Shelf, WSS-402, DTM-8, and AWG-40 Two-Degree Configuration Example