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Collector Filter Module
This chapter describes the Collector Filter module (CFM).
14.1 Functional Description
The CFM transfers optical signals between the DWDM side of the ONS 15201 Single-Channel Unit
(SCU) and the Client Layer Interface Port
intended for the SCU to the opposite port on the other side. Only one CFM is used in each collector node.
The CFM adds the output signal from the CLIP DWDM laser to the optical line. The CFM also drops
the incoming signal from the same ITU channel. In protected mode, this signal goes to the A and B
receivers on the ONS 15201 CLIP module. In unprotected mode, this signal goes to the A receiver only.
Channels that are not dropped by the CFM pass through to the SCU. Refer to Chapter 1 of the Cisco ONS
15200 Product Description for optical loss information.
If the wavelength is not stripped off and sent to the CLIP, the A-side IN goes to the B-side OUT, the
B-side IN goes to the A-side OUT.
The CFM does not use any alarm or supervisory interconnections.
Note
The following tables show how the CFM is connected to the SCU. For detailed optical hookup and
testing procedures, refer to the Cisco ONS 15200 Installation, Setup, and Test Manual.
Remember to always clean the fiber optic connectors before inserting them into the adapters.
Caution
Table 14-1
ONS 15201 SCU split ratios.
Table 14-1 SC Connections—CFM to SCU
SCU Type
A-100/B-0
A-90/B-10
A-50/B-50
A-10/B-90
78-13767-01
shows the placement of the SC connectors (numbered 1, 2, 3 and 4) for the different
CFM Type
100/0 + 0/100
90/10 + 10/90
50/50 + 50/50
90/10 + 10/90
C H A P T E R
CLIP) module. It also transfers the part of the signal not
(
A Input
A Output
1
2
3
4
3
4
1
2
Cisco ONS 15200 Module Handbook
14
B Input
B Output
3
4
1
2
1
2
3
4
14-1
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