Specifications

2-7
Cisco ONS 15530 Planning Guide
OL-7708-01
Chapter 2 Protection Schemes and Network Topologies
Splitter Based Facility Protection
Figure 2-4 Splitter Protection with 10-Gbps ITU Tunable and Non tunable Trunk Cards
A switchover is triggered in hardware by a loss of light on the receive signal. Switchovers for signal
degrade or signal failure are configurable in the software.
Splitter Protection Considerations When Using 10-Gbps ITU Line Cards
The following considerations apply when using splitter protection:
• Because the signal splitter module on splitter 10-Gbps ITU line cards introduces 3.55 dB of loss in
the transmit direction, we recommend using nonsplitter line cards for configurations where splitter
protection is not required.
• The APS software that supports splitter protection can be configured as revertive or nonrevertive.
Unless a switchover request from the CLI (command-line interface) is in effect, the system uses the
working interface for the active signal. After a system-initiated switchover to the protection
interface occurs for signal quality reasons, the active traffic can be put back on the previously failed
working fiber after the fault has been remedied. The fault can be remedied either automatically
(revertive) or through manual intervention (nonrevertive).
10-port ESCON card
10 -Gbps ITU trunk card
OADM
modules
West
East
Active signal
Standby
signal
Optical fiber
connection
Electrical backplane
connection
Standby
switch fabric
connection
2.5 Gbps
aggregated
signal
SRC
LRCLRC
79308
Redundant
CPU switch
modules
Splitter module and
optical switch
10-GE ITU
transceiver