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Chapter 12
SONET Topologies and Upgrades
Figure 12-34
Source
Drop
12.11 OC-N Speed Upgrades
A span is the optical fiber connection between two ONS 15454 nodes. In a span (optical speed) upgrade,
the transmission rate of a span is upgraded from a lower to a higher OC-N signal but all other span
configuration attributes remain unchanged. With multiple nodes, a span upgrade is a coordinated series
of upgrades on all nodes in the ring or protection group. You can perform in-service span upgrades for
the following ONS 15454 cards:
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•
•
•
•
•
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•
•
Note
You can also perform in-service card upgrades for the following ONS 15454 cards:
•
78-18106-01
STS Around the Ring
ONS 15454
Node 1
Single-port OC-12 to OC-48
Single-port OC-12 to OC-192
Single-port OC-12 to four-port OC-12
Single-port OC-12 to MRC-12
Four-port OC-12 to MRC-2.5G-4
OC-48 to OC-192
MRC-12 to OC-192 or OC192-XFP
MRC-2.5G-4 to OC-192 or OC192-XFP
OC-48 to OC192SR1/STM64IO Short Reach or OC192/STM64 Any Reach
Only Software Release 8.5.3 or higher supports span upgrades on MRC-12 and MRC-2.5G-4
cards to OC-192 or OC192-XFP. To perform this span upgrade the card's SFP must be in PPM
Slot 1 only.
Four-port OC-3 to eight-port OC-3
ONS 15454
Node 2
ONS 15454
Node 4
Cisco ONS 15454 Reference Manual, R8.5
12.11 OC-N Speed Upgrades
ONS 15454
Node 3
12-35
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