Cisco ONS 15454 SDH Manual page 102

1.6.6 Forward Error Correction
1.6.6 Forward Error Correction
In DWDM spans, FEC reduces the quantities of retiming, reshaping, and regeneration (3R) operations
needed to maintain signal quality. The following two PM parameters are associated with FEC:
•
•
Complete the following procedure to provision BIEC and UNC-WORDS PM parameters for FEC.
Provision Card FEC Thresholds
In node view, double-click the TXP_MR_2.5G card to open the card view.
Step 1
Note
Click the Provisioning > OTN > FEC Thresholds tabs
Step 2
Figure 1-45
In the Bit Errors Corrected field, enter a threshold number, for example 225837.
Step 3
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-102
BIEC—Bit errors corrected (BIEC) indicates the number of bit errors corrected in the DWDM trunk
line during the PM time interval.
UNC-WORDS—The number of uncorrectable words detected in the DWDM trunk line during the
PM time interval.
In this example, other transponder and muxponder cards are also applicable, such as
TXP_MR_10G, TXPP_MR_2.5G, and MXP_2.5G_10G.
Provision Card FEC Thresholds
Chapter 1 General Troubleshooting
(Figure 1-45).
July 2005