Cisco ONS 15200 - Manual (Page 28)

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Cisco ONS 15200 Product Description
78-13766-01
Chapter 3 Product Hardware
Modularity and Ancillary Equipment
Figure 3-1 Functional view of the ONS 15252 Multichannel Unit (protected version)
Two versions of the ONS 15252 MCU mechanical shelf exist: Release 1.0 and Release 1.0.1. Cisco
currently ships only the Release 1.0.1 shelf and no longer ships the Release 1.0 shelf.
Release 1.0.1 and later shelves includes a baffle. The baffle is a partially-perforated, angled metal plate
that is mounted below and behind the metal support beam and is mechanically attached to the back of
the shelf. It runs the width of the shelf. To view the baffle, look up through the ventilation cavities at the
back of the shelf.
Figure 3-2 illustrates a shelf with a bafffe (Release 1.0.1), and a shelf without a baffle
(Release 1.0).
Figure 3-2 Release 1.0.1 (and later) shelf baffle compared to the Release 1.0 shelf without baffle
Tx
A B
LM HFM BM HFM LM
NAM
To and from the client layer
(External to the ONS 15200 system)
OUT
IN IN
OUT
A-side
optical
B-side
optical
LEGEND
A - A side
B - B side
BM - Bridge Module
CLIP - Client Line Interface Port module
DWDM - dense wavelength division multiplexing
HFM - Hub Filter Module
LM - Line Module
NAM - Network Adaptation Module
CLIP
To and from
the DWDM layer
To and from
the DWDM layer
54635
Baffle