18-9
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
August 2005
Chapter 18 Network Reference
18.3.1 Optical Performance for Rings and Linear Networks with OADM Nodes
shows the optical performance for 16-channel networks using SMF fiber. Span loss values
assume the following:
•
OADM nodes have a loss of 16 dB and equal span losses.
•
The DCU loss is 9 dB.
•
All nodes have OPT-PRE and OPT-BST/OPT-BST-E amplifiers installed.
•
The OPT-PRE amplifier switches to control power whenever the span loss is higher than 27 dB.
See
for a list of cards in each class. A dash (—) indicates the spans that are not supported.
shows the optical performance for 32-channel networks using TW-RS fiber. Span loss values
assume the following:
•
OADM nodes have a loss of 16 dB and equal span losses.
•
The DCU is 550 ps with 4 dB loss.
•
All nodes have OPT-PRE and OPT-BST/OPT-BST-E amplifiers installed.
•
The OPT-PRE amplifier switches to control power whenever the span loss is higher than 27 dB.
See
for a list of cards in each class. A dash (—) indicates the spans that are not supported.
Table 18-4
Span Loss for 16-Channel Ring and Linear Networks with OADM Nodes Using SMF Fiber
Number of
Spans
10 Gbps
2.5 Gbps
Class A
Class B
Class C
Class I
Class D
Class E
Class F
Class G
Class H
Class J
1
37 dB
29 dB
28 dB
37 dB
37 dB
36 dB
33 dB
35 dB
37 dB
33 dB
2
32 dB
24 dB
24 dB
34 dB
35 dB
31 dB
28 dB
30 dB
32 dB
28 dB
3
29 dB
22 dB
21 dB
31 dB
32 dB
28 dB
25 dB
27 dB
29 dB
25 dB
4
27 dB
19 dB
17 dB
29 dB
30 dB
26 dB
23 dB
25 dB
27 dB
23 dB
5
26 dB
—
—
27 dB
28 dB
24 dB
22 dB
24 dB
25 dB
22 dB
6
25 dB
—
—
26 dB
27 dB
23 dB
21 dB
23 dB
24 dB
21 dB
7
24 dB
—
—
25 dB
256dB
23 dB
19 dB
22 dB
23 dB
19 dB
Table 18-5
Span Loss for 32-Channel Ring and Linear Networks with OADM Nodes Using TW-RS Fiber
Number of
Spans
10 Gbps
2.5 Gbps
Class A
Class B
Class C
Class I
Class D
Class E
Class F
Class G
Class H
Class J
1
35 dB
25 dB
25 dB
37 dB
37 dB
33 dB
30 dB
32 dB
34 dB
30 dB
2
29 dB
21 dB
20 dB
31 dB
32 dB
28 dB
26 dB
27 dB
29 dB
26 dB
3
27 dB
17 dB
15 dB
29 dB
30 dB
26 dB
23 dB
25 dB
27 dB
23 dB
4
25 dB
—
—
27 dB
28 dB
23 dB
20 dB
22 dB
24 dB
20 dB
5
23 dB
—
—
26 dB
27 dB
22 dB
16 dB
20 dB
23 dB
16 dB
6
21 dB
—
—
24 dB
25 dB
19 dB
—
17 dB
21 dB
—
7
20 dB
—
—
22 dB
24 dB
16 dB
—
—
19 dB
—
Summary of Contents for ONS 15454 DWDM
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