Cisco ONS 15454 Troubleshooting Manual page 416

2.7.363 SF (DS1, DS3)
2.7.363 SF (DS1, DS3)
A Signal Fail (SF) condition occurs when the quality of the signal has exceeded the BER signal failure
threshold. Signal failure is defined by Telcordia as a "hard failure" condition. The SD and SF conditions
both monitor the incoming BER error rate and are similar conditions, but SF is triggered at a higher BER
than SD.
The BER threshold is user-provisionable and has a range for SF from 1E–5 dBm to 1E–3 dBm.
Warning Invisible laser radiation could be emitted from the end of the unterminated fiber cable or connector.
Do not stare into the beam directly with optical instruments. Viewing the laser output with certain
optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of
100 mm could pose an eye hazard. Statement 1056
Use of controls, adjustments, or performing procedures other than those specified could result in
Warning
hazardous radiation exposure. Statement 1057
Clear the SF (DS1, DS3) Condition
Complete the
Step 1
Caution Always use the supplied electrostatic discharge wristband when working with a powered ONS 15454.
Plug the wristband cable into the ESD jack located on the lower-right edge of the shelf assembly.
If the condition does not clear, log into the Technical Support Website at
Step 2
http://www.cisco.com/techsupport for more information or call Cisco TAC 1 800 553-2447.
2.7.364 SF (E1)
An SF condition for an E1 occurs on a DS1/lE1-56 card in E1 only mode when the quality of the signal
has exceeded the BER signal failure threshold.
SF monitors the incoming BER error rate just as SD does, but SF is triggered at a higher BER than SD.
The SF BER threshold is user-provisionable and has a range for SF from 1E–5 dBm to 1E–3 dBm.
Invisible laser radiation could be emitted from the end of the unterminated fiber cable or connector.
Warning
Do not stare into the beam directly with optical instruments. Viewing the laser output with certain
optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of
100 mm could pose an eye hazard. Statement 1056
Cisco ONS 15454 Troubleshooting Guide, R8.5
2-222
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Objects: DS1, DS3
"Clear the SD (DS1, DS3) Condition" procedure on page
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: E1
Chapter 2 Alarm Troubleshooting
2-218.
November 2009