Cisco ONS 15454 DWDM - Figure 16-72 Y-Cable Protection; Splitter Protection

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Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
April 2006
Chapter 16 Card Reference
16.9.2 Splitter Protection
Figure 16-72 Y-Cable Protection
16.9.2 Splitter Protection
Splitter protection, shown in Figure 16-73, 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.
Client
"Working" card
(TXP or MXP)
"Protection" card
(TXP or MXP)
Y cables
TX
RX
Working
Protect
Client
Port
Tr un k
Port
Client
Port
Tr un k
Port
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