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Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 2 General Troubleshooting
Fiber and Cabling
Step 3 Check that the single-mode fiber power level is within the specified range:
a. Remove the receive (Rx) end of the suspect fiber.
b. Connect the receive end of the suspect fiber to a fiber-optic power meter, such as a GN Nettest
LP-5000.
c. Determine the power level of fiber with the fiber-optic power meter.
d. Verify the power meter is set to the appropriate wavelength for the optical card being tested (either
1310 nm or 1550 nm depending on the specific card).
e. Verify that the power level falls within the range specified for the card; see the “Optical Card
Transmit and Receive Levels” section on page 2-37.
Step 4 If the power level falls below the specified range:
a. Clean or replace the fiber patch cords. If possible, do this for the STM-N card you are working on
and the far-end card.
b. Clean the optical connectors on the card. If possible, do this for the STM-N card you are working
on and the far-end card.
c. Ensure that the far-end transmitting card is not an ONS intermediate range (IR) card when an ONS
long range (LR) card is appropriate.
IR cards transmit a lower output power than LR cards.
d. Replace the far-end transmitting STM-N card to eliminate the possibility of a degrading transmitter
on this STM-N card.
e. If the power level still falls below the specified range with the replacement fibers and replacement
card, check for one of these three factors that attenuate the power level and affect link loss (LL):
–
Excessive fiber distance; single-mode fiber attenuates at approximately 0.5 dB/km.
–
Excessive number or fiber connectors; connectors take approximately 0.5 dB each.
–
Excessive number of fiber splices; splices take approximately 0.5 dB each.
Note These are typical attenuation values. Refer to the specific product documentation for the
actual values or use an optical time domain reflectometer (OTDR) to establish precise
link loss and budget requirements.
Step 5 If no power level shows on the fiber, the fiber is bad or the transmitter on the optical card failed.
a. Check that the Transmit (Tx) and Receive (Rx) fibers are not reversed. LOS and EOC alarms
normally accompany reversed Tx and Rx fibers. Switching reversed Tx and Rx fibers clears the
alarms and restores the signal.
b. Clean or replace the fiber patch cords. If possible, do this for the STM-N card you are working on
and the far-end card.
c. Retest the fiber power level.
d. If the replacement fiber still shows no power, replace the optical card.
Step 6 If the power level on the fiber is above the range specified for the card, ensure that an ONS long-range
(LR) card is not being used when an ONS intermediate-range (IR) card is appropriate.
LR cards transmit a higher output power than IR cards. When used with short runs of fiber, an LR
transmitter will be too powerful for the receiver on the receiving STM-N card.
Receiver overloads occur when maximum receiver power is exceeded.
- Text Part Number: 78-13037-01 1
- CONTENTS 3
- 2 General Troubleshooting 2-1 7
- 3 Card Reference 3-1 9
- Contents 10
- May 2002 10
- 4 Maintenance 4-1 11
- About This Manual 19
- Related Documentation 20
- Conventions 20
- Obtaining Documentation 21
- Cisco.com 22
- Technical Assistance Center 22
- Cisco TAC Web Site 23
- Cisco TAC Escalation Center 23
- Alarm Troubleshooting 25
- Alarm Index 26
- Alarm Index by Alarm Type 27
- 1.3 Trouble Notifications 29
- 1.4 Safety Summary 30
- 1.5 Alarm Procedures 31
- 1.5.3 APSC-IMP 32
- 1.5.4 APSCINCON 33
- 1.5.5 APSCM 33
- 1.5.6 APSCNMIS 34
- 1.5.7 AU-LOP 35
- 1.5.8 AUTOLSROFF 36
- 1.5.9 AUTORESET 37
- 1.5.10 AUTOSW-LOP-SNCP 37
- Alarm Procedures 38
- 1.5.11 AUTOSW-UNEQ-SNCP 39
- 1.5.12 BKUPMEMP 40
- 1.5.13 CARLOSS (E-Series) 41
- 1.5.14 CARLOSS (EQPT) 42
- 1.5.15 CONTBUS-A 43
- 1.5.16 CONTBUS-A-18 44
- 1.5.17 CONTBUS-B 45
- 1.5.18 CONTBUS-B-18 46
- 1.5.19 CTNEQPT-PBPROT 46
- 1.5.20 CTNEQPT-PBWORK 48
- 1.5.21 DATAFLT 49
- 1.5.22 EHIBATVG-A 50
- 1.5.23 EHIBATVG-B 50
- 1.5.24 ELWBATVG-A 50
- 1.5.25 ELWBATVG-B 51
- 1.5.26 EOC 51
- 1.5.27 EQPT 53
- 1.5.28 EQPT-MISS 53
- 1.5.29 E-W-MISMATCH 54
- 1.5.30 EXCCOL 55
- 1.5.31 EXT 56
- 1.5.32 EXTRA-TRAF-PREEMPT 56
- 1.5.33 FAN 57
- 1.5.34 FEPRLF 57
- 1.5.35 FE-SDPRLF 58
- 1.5.36 FRNGSYNC 58
- 1.5.37 FSTSYNC 58
- 1.5.38 HITEMP 59
- 1.5.39 HLDOVERSYNC 59
- 1.5.40 HP-TIM 60
- 1.5.41 HP-UNEQ 60
- 1.5.42 IMPROPRMVL 61
- 1.5.43 INVMACADDR 62
- 1.5.44 LOF (E-1) 62
- 1.5.45 LOF (STM-N) 63
- 1.5.46 LOS (E-N) 64
- 1.5.47 LOS (STM-N) 65
- 1.5.48 MEA (EQPT) 65
- 1.5.49 MEA (FAN) 66
- 1.5.50 MEM-GONE 67
- 1.5.51 MEM-LOW 67
- 1.5.53 MSSP-OOSYNC 69
- 1.5.54 PRC-DUPID 69
- 1.5.55 PWR-A 70
- 1.5.56 PWR-B 70
- 1.5.57 RCVR-MISS 71
- 1.5.58 RING-MISMATCH 71
- 1.5.59 SDBER-EXCEED-HO 72
- 1.5.60 SFBER-EXCEED-HO 72
- 1.5.61 SFTWDOWN 73
- 1.5.62 SNTP-HOST 73
- 1.5.63 SQUELCH-PATH 74
- 1.5.64 SSM-FAIL (BITS) 74
- 1.5.65 SWMTXMOD 74
- 1.5.66 SYNCPRI 76
- 1.5.67 SYNCSEC 76
- 1.5.68 SYNCTHIRD 77
- 1.5.69 SYSBOOT 78
- 1.5.70 TPTFAIL 78
- 1.5.71 TRMT 78
- 1.5.72 TRMT-MISS 79
- General Troubleshooting 81
- Network Troubleshooting Tests 82
- Procedure: Test the FMEC Card 86
- Procedure: Test the FMEC card 93
- 2.3.14 Ethernet Connections 104
- 2.4 Circuits and Timing 107
- Circuits and Timing 108
- 2.5 Fiber and Cabling 111
- Fiber and Cabling 112
- Class 1 laser product 114
- Figure 2-16 RJ-45 pin numbers 116
- 2.6 Power and LED Tests 118
- Power and LED Tests 119
- Card Reference 121
- 3.1.3 Optical Cards 122
- 3.1.4 Ethernet Cards 123
- 3.1.5 Card Power Consumption 123
- Chapter 3 Card Reference 124
- Electrical Card Protection 124
- 3.2.1 1:0 Protection 125
- 3.2.2 1:1 Protection 125
- 3.2.3 1:N Protection 125
- 3.2.3.1 Revertive Switching 126
- 3.3 Optical Card Protection 127
- Unprotected 128
- 3.6.1 TCC-I Functionality 129
- 3.6.4 TCC-I Specifications 131
- 3.7 Cross Connect XC10G Card 132
- ACT/STBY 133
- Card-Level LEDs Definition 134
- Cross Connect XC10G Card 135
- 3.8 E1-N-14 Card 136
- E1-N-14 Card 137
- 3.8.3 E1-N-14 Specifications 138
- 3.9 E3-12 Card 139
- Figure 3-11 E3-12 faceplate 140
- 3.9.3 E3-12 Specifications 141
- 3.10 DS3i-N-12 Card 142
- DS3i-N-12 Card 143
- 3.11 BLANK Card 146
- 33678 12931 147
- 3.12 FMEC-E1 Card 148
- 3.13 FMEC-E3/DS3 Card 149
- FMEC-E3/DS3 Card 150
- 3.14 FMEC-DS1/E1 Card 152
- 3.15 FMEC-BLANK Card 153
- 3.16 MIC-A/P Card 154
- MIC-A/P Card 155
- 3.17 MIC-C/T/P Card 156
- MIC-C/T/P Card 157
- OC3 IR 4/STM1 SH 1310 Card 160
- OC12 IR/STM4 SH 1310 Card 164
- OC12 LR/STM4 LH 1310 Card 167
- OC12 LR/STM4 LH 1550 Card 169
- OC48 IR/STM16 SH AS 1310 Card 174
- OC48 LR/STM16 LH AS 1550 Card 177
- OC192 LR/STM64 LH 1550 Card 184
- Class 1M (IEC) 185
- Class 1 (CDRH) 185
- 3.26 E100T-G Card 188
- Figure 3-43 E100T-G faceplate 189
- E100T-G Card 190
- 3.27 E1000-2-G Card 192
- E1000-2-G Card 193
- 3.28 G1000-4 Card 195
- G1000-4 Card 197
- Maintenance 199
- 4.1 Air Filter Inspection 200
- Fan tray filter 201
- 4.2 System Reset 202
- Chapter 4 Maintenance 203
- System Reset 203
- 4.4 Card Replacement 207
- Card Replacement 208
- 4.5 Span Upgrade 214
- 4.5.1 Span Upgrade Wizard 215
- Span Upgrade 216
- 4.5.2 Manual Span Upgrades 221
- 4.6 Fiber Cleaning 225
- 4.7 Powering Down a Node 226
- Procedure: Power Down a Node 227
- 4.8 Powering Up a Node 228
- Powering Up a Node 229
- Numerics 231
- Glossary 232
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