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Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 2 General Troubleshooting
Circuits and Timing
2.4.4 Holdover Synchronization Alarm
Symptom The clock is running at a different frequency than normal and the HLDOVERSYNC alarm
appears.
Table 2-19 describes the potential cause(s) of the symptom and the solution(s).
Table 2-18 ONS 15454 SDH Switches Timing Reference
Possible Problem Solution
The optical or SETS
input is receiving loss of
signal (LOS), loss of
frame (LOF), or AIS
alarms from its timing
source.
The ONS 15454 SDH internal clock operates at a Stratum 3 level of
accuracy. This gives the ONS 15454 SDH a free-running synchronization
accuracy of ±
4.6 ppm and a holdover stability of less than 255 slips in the
first 24 hours or 3.7x10-
7
/day, including temperature.
ONS 15454 SDH free-running synchronization relies on the Stratum 3
internal clock. Over an extended time period, using a higher quality Stratum
1 or Stratum 2 timing source results in fewer timing slips than a lower quality
Stratum 3 timing source.
The optical or SETS
input is not functioning.
Sync Status Messaging
(SSM) message is set to
Don’t Use for Sync
(DUS).
SSM indicates a
Stratum 3 or lower
clock quality.
The input frequency is
off by more than 15
ppm.
The input clock
wanders and has more
than three slips in 30
seconds.
A bad timing reference
existed for at least two
minutes.
Table 2-19 Holdover Synchronization Alarm
Possible Problem Solution
The last reference input
has failed.
The clock is running at the frequency of the last known-good reference input.
This alarm is raised when the last reference input fails. See the
“HLDOVERSYNC” section on page 1-35 for a detailed description of this
alarm.
- 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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