Figure 1-10 Typical Y-Cable Protection Module Configuration - Cisco ONS 15454 DWDM Reference Manual

1.4.2 Single Y-Cable Protection Module
Figure 1-10
Client
Protecting
Card
Client
Working
Card
When the module is used in the coupler direction, the individual signals enter the module from the
CPL-RXn ports and pass through a passive star coupler to the CPL-TX port. The coupler is not meant to
combine both the protect and working client card signals. The module allows a path for the working
client transmit interface to connect to the network in the event the opposite interface in the protection
pair should fail (the protect interface switches to the working interface).
When the module is used in the splitter direction, the signal enters the module from the SPL-RX port
and is split through a passive star coupler to the SPL-TXn ports. This module, although designed to pass
wavelengths associated with the ONS 15454 32-channel plan, is not selective to specific wavelengths
(modules do not filter wavelengths).
Figure 1-11
Cisco ONS 15454 DWDM Reference Manual, R8.5
1-14
Typical Y-Cable Protection Module Configuration
TX
RX
TX
RX
shows the block diagram of the Y-cable protection module.
Chapter 1
Y_Cable
Protection
Module
Shelf Assembly Hardware
Line
Line
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