Datasheet

Table Of Contents
12-16
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 12 SDH Topologies and Upgrades
12.3 Subnetwork Connection Protection
Figure 12-15 STM-1 SNCP Ring
Node A has four E1-14 cards to provide 42 active E-1 ports. The other sites only require two E1-14 cards
to carry the eight E-1s to and from the remote switch. You can use the other half of each
ONS 15454 SDH shelf assembly to provide support for a second or third ring to other existing or planned
remote sites.
In this sample STM-1 SNCP ring, Node A contains four E1-14 cards and two STM-1 cards. Six free slots
are available, which you can provision with cards or leave empty.
Caution Fill unused card slots with a filler card (Cisco P/N 15454-BLANK). Cover unused FMEC slots with a
blank faceplate (Cisco P/N 15454E-BLANK-FMEC). The filler cards and blank faceplates ensure proper
airflow when operating the ONS 15454 SDH without the front door attached, although Cisco
recommends that the front door remain attached.
Figure 12-16 shows the shelf setup for this sample configuration.
8 E-1s
8 E-1s
8 E-1s
V5.x
Switch
ONS 15454 SDH
Node A
ONS 15454 SDH
Node B
ONS 15454 SDH
Node C
ONS 15454 SDH
Node D
= Fiber 1
= Fiber 2
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