Cisco ONS 15454 DWDM - Single-Span Link

18-6
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
August 2005
Chapter 18 Network Reference
18.2.6 Single-Span Link
Figure 18-6 Linear Configuration without an OADM Node
18.2.6 Single-Span Link
Single-span link is a type of linear configuration characterized by a single-span link with
pre-amplification and post-amplification. A single-span link is also characterized by the use of two
terminal nodes (west and east). The terminal nodes are usually equipped with a 32MUX-O card and a
32DMX-O card. However, a 32WSS card and a 32DMX or a 32DMX-O card can be installed. Software
R4.7 and later also supports single-span links with AD-4C-xx.x cards. Only unprotected traffic can be
provisioned on a single-span link.
Figure 18-7 shows ONS 15454s in a single-span link. Eight channels are carried on one span.
Single-span link losses apply to OC-192 LR ITU cards. The optical performance values are valid
assuming that the sum of the OADM passive node insertion losses and the span losses does not exceed
35 dB.
Figure 18-7 Single-Span Link
18.3 Optical Performance
This section provides optical performance information for ONS 15454 DWDM networks. The
performance data is a general guideline based upon the network topology, node type, client cards, fiber
type, number of spans, and number of channels. The maximum number of nodes that can be in an
ONS 15454 DWDM network is 16. The DWDM topologies and node types that are supported are shown
in Table 18-1.
Line amplifier
96639
W
est terminal East terminal
OSC
OSC
Line amplifier Line amplifier
90999
West terminal East terminal
~130/150 km
OSC
OSC