Cisco ONS 15454 DWDM - Page 915

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
Table 18-4 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 Table 18-2 for a list of cards in each class. A dash (—) indicates the spans that are not supported.
Table 18-5 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 Table 18-2 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 —