Cisco ONS 15200 - Manual (Page 53)

5-3
Cisco ONS 15200 Product Description
78-13766-01
Chapter 5 Module Descriptions
Network Adaptation Module
5.4 Network Adaptation Module
The NAM splits the outgoing optical signal from the CLIP module (one of the DWDM wavelengths or
channels) before transferring it to the passive optical shelf (located in the lower part of the ONS 15252
MCU). The NAM split ratio can be 100/0, 90/10, 50/50, 10/90, or 0/100. Unprotected channels use the
split ratios 100/0 and 0/100. Protected channels use the split ratios 90/10, 50/50, and 10/90.
The NAM transfers the signal to the passive optical shelf in the following patterns:
• A side or B side (unprotected channel)
• A side and B side (protected channel)
The HFMs collect the incoming optical signals from the DWDM side of the ONS 15200 system and
transfer the outgoing signals to the DWDM side of the ONS 15200 system. The NAMs then transfer
these incoming/outgoing optical signals to/from the CLIP modules.
5.5 Network Control Board Module
The NCB module is the hardware platform for the Subnetwork Manager (SNM) software package, which
you access using the Ethernet connector on the front of the NCB module. The NCB supervises,
administers, and monitors the ONS 15200. In addition to controlling all of the ONS 15200 system CLIP
modules, the NCB module collects information about system status, alarms, parameters, and actions on
the internal data bus. You can also store performance monitoring data on the NCB and upload the data
to external media.
Release 1.1 supports multiple NCBs on the CAN bus; however, you can only configure two active NCBs
as managers of any CLIP in a network. Any NCB in a network that is not provisioned as an active
manager of a CLIP can still inventory the CLIP. Release 1.0.1 only supports one NCB on the CAN bus.
In addition to alarm lines on the internal data bus, the NCB has three dedicated LEDs. When lit, the
LEDs indicate the status shown in
Table 5-2 .
The ONS 15200 system can function without the NCB module. When you choose not to use an NCB
module, mount a front cover in its place for EMC/EMI precautions. The front cover used in place of the
NCB module is narrower than the front cover used in place of the CLIP module. Do not interchange the
two types of front covers.
Table 5-2 NCB Indicators
LED Status
Red Critical or major alarm
Amber Minor alarm or warning
Green Power on