Specifications

10-8
Cisco ONS 15216 EDFA2/EDFA2-A Operations Guide, R2.4
July 2004
Chapter 10 Troubleshooting
10.2 Typical Troubleshooting Scenarios
;
Amp01:ONS15216 EDFA2>
ED-EQPT:SID:PWR-B:125:Amp01::PWRBUSMODE=SIMPLEX;
þAmp01 2004-03-17 00:23:07
A þ1 REPT EVT EQPT
þ"PWR-B:PWRBUSMODE,TC,3-17,0-23-7,,,,:\"Power Bus Mode Changed\""
;
þAmp01 2004-03-17 00:23:08
A þ2 REPT ALM EQPT
þ"PWR-B:CL,PWRBUSB,NSA,3-17,0-23-8,,:\"Power Bus B Alarm\""
;
þAmp01 2004-03-17 00:23:08
M þ125 COMPLD
þ/* ED-EQPT */
;
10.2 Typical Troubleshooting Scenarios
This section provides several troubleshooting scenarios.
10.2.1 No Output Power after Adjusting Gain Settings
The no output power after adjusting gain setting issue occurs only with software version 2.1.0.
Release Notes 2.1.0 Caveat CSCdy50894
Explanation The VOA pre-attenuator is stuck at maximum attenuation if the gain setting is modified
when the input power is below the minimum signal level.
Recommended Action Use the following series of sample commands to recover from the VOA being
stuck at high attenuation:
For TL1:
name :ONS15216 EDFA2> ED-DWDM: name :all:100:::PUMP1CTRLMODE=PWR,PUMP1CTRLVALUE=50;
name :ONS15216 EDFA2> ED-DWDM: name :all:101:::PREATT=10;
name :ONS15216 EDFA2> ED-DWDM: name :all:102:::PUMP1CTRLMODE=GAINTEMP;
name :ONS15216 EDFA2> ED-DWDM: name :all:103:::OVERALLGAIN=160;
For ASH:
ash: hostname :ONS15216 EDFA2> snmp attribute set local cerent15216EdfaPumpCfgConstPumpPower
1 50
ash:
hostname :ONS15216 EDFA2> snmp attribute set local cerent15216EdfaPumpCfgControlMode 1
constPower
ash:
hostname :ONS15216 EDFA2> snmp attribute set local
cerent15216EdfaVariableGainPreAttenuation 10
ash: hostname :ONS15216 EDFA2> snmp attribute set local cerent15216EdfaConstGainOverallGain
160