Cisco ONS 15454 DWDM - Page 920

18-14
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
August 2005
Chapter 18 Network Reference
18.3.3 Optical Performance for ROADM Rings and Linear Networks
The following tables show the pass/fail criteria for eight and sixteen ROADM nodes. Table 18-14 shows
the pass/fail criteria for eight ROADM nodes (seven spans) required for any-to-any node circuit
reconfigurations:
• All nodes in the ring are ROADM.
• Span losses are equal.
See Table 18-2 for a list of cards in each class. A dash (—) indicates the spans that are not supported.
6 17 dB — — 19 dB 22 dB 18 dB — 17 dB 18 dB —
715
1
dB — — 17 dB 21 dB 16 dB — 15
1
16 dB —
1. 0.5 dB of OSNR impairment recovered by FEC margin @ BER>10-6
Table 18-13 Span Loss for 32-Channel Ring and Linear Networks with ROADM and 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
Table 18-14 Pass/Fail Criteria for 32-Channel, Eight-Node ROADM Rings Using SMF Fiber
Span
Loss (dB)
Amplifiers
Installed
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 OPT-PRE only Yes <7 <7 Yes Yes Yes Yes Yes Yes —
2 OPT-PRE only Yes <7 <7 Yes Yes Yes Yes Yes Yes —
3 OPT-PRE only Yes <7 <7 Yes Yes Yes <7 Yes Yes —
4 OPT-PRE only Yes <7 <7 Yes Yes Yes <7 Yes Yes —
5 OPT-PRE only Yes <7 <7 Yes Yes Yes <7 Yes Yes —
6 OPT-PRE only Yes <7 <7 Yes Yes Yes <7 Yes Yes —
7OPT-PRE and
OPT-BST/
OPT-BST-E
Yes <7 <7 Yes Yes Yes <7 Yes Yes —
8OPT-PRE and
OPT-BST/
OPT-BST-E
Yes <7 <7 Yes Yes Yes <7 Yes Yes —
9OPT-PRE and
OPT-BST/
OPT-BST-E
Yes <7 <7 Yes Yes Yes Yes Yes Yes —
10 OPT-PRE and
OPT-BST/
OPT-BST-E
Yes <7 <7 Yes Yes Yes Yes Yes Yes —
11 OPT-PRE and
OPT-BST/
OPT-BST-E
Yes <7 <7 Yes Yes Yes Yes Yes Yes —
12 OPT-PRE and
OPT-BST/
OPT-BST-E
Yes <7 <7 Yes Yes Yes Yes Yes Yes —