Cisco ONS 15454 DWDM - Figure 8-29 Y-Cable Protection; Splitter Protection

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Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 8 Transponder and Muxponder Cards
8.13.2 Splitter Protection
Figure 8-29 Y-Cable Protection
8.13.2 Splitter Protection
Splitter protection, shown in Figure 8-30, is provided with TXPP and MXPP cards. To implement splitter
protection, a client injects a single signal into the client RX port. An optical splitter internal to the card
then splits the signal into two separate signals and routes them to the two trunk TX ports. The two signals
are transmitted over diverse optical paths. The far-end MXPP or TXPP card uses an optical switch to
choose one of the two trunk RX port signals and injects it into the TX client port. When using splitter
protection with two MXPP or TXPP cards, there are two different optical signals that flow over diverse
paths in each direction. In case of failure. the far-end switch must choose the appropriate signal using
its built-in optical switch. The triggers for a protection switch are LOS, LOF, SF, or SD.
Figure 8-30 Splitter Protection
Client
"Working" card
(TXP or MXP)
"Protection" card
(TXP or MXP)
Y cables
TX
RX
Working
Protect
Client
Port
Trunk
Port
Client
Port
Trunk
Port
124080
Client
Protected Card
Working
Protect
Client
Port
RX
TX
Splitter
Switch
Trunk
Port
Trunk
Port
124079