Sjzl20083213-ZXG10 BSS (V6.20) Alarm Handling Manual

8/12/2019 Sjzl20083213-ZXG10 BSS (V6.20) Alarm Handling Manual

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ZXG10 BSSBase Station Subsystem

Alarm Handling Manual

Version 6.20

ZTE CORPORATIONZTE Plaza, Keji Road South,Hi-Tech Industrial Park,Nanshan District, Shenzhen,P. R. China518057Tel: (86) 755 26771900 800-9830-9830Fax: (86) 755 26772236URL: http://support.zte.com.cn E-mail: [email protected]
http://support.zte.com.cn/mailto:[email protected]:[email protected]://support.zte.com.cn/


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LEGAL INFORMATION

Copyright 2006 ZTE CORPORATION.

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Revision History

Date Revision No. Serial No. Reason for Issue

Aug. 29, 2008 R1.0 sjzl20083213 First edition


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DocumentName ZXG10 BSS (V6.20) Base Station Subsystem Alarm Handling Manual

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Contents

About This Manual .. .......................................................... i Purpose.. .............................................................................. i

Intended Audience .. ............................................................... i

Prerequisite Skill and Knowledge .. ............................................ i

What Is in This Manual .. ......................................................... i

Related Documentation... ....................................................... ii

Conventions.... .................................................................... iii

How to Get in Touch... .......................................................... iv

Declaration of RoHS Compliance.. ................................... v

Chapter 1.. ........................................................................ 1

Alarm Message Summary.. .............................................. 1

Alarm Code Definition .. .................................................... 1

Alarm Severity Level .. ........................................................... 1

Alarm Handling .. ............................................................. 2

Alarm Classification.. ............................................................. 3

Chapter 2.. ........................................................................ 5

Alarm Messages.. ............................................................. 5

Equipment Alarms .. ......................................................... 5

Loss of Optical Transceiver Module Signal .. ............................... 5

Ethernet Controller's Physical Link Off .. .................................... 6 Trunk Link Is Used for CSU Loopback Test .. .............................. 6

Cell Delineation Not Synchronized .. ......................................... 7

Loss of Cell Delineation.. ........................................................ 7

8K input clock lose .. .............................................................. 7

16M Input Clock Lose .. .......................................................... 8

PP2S Clock Input Lose .. ......................................................... 8

32M Clock lost in TSNB.. ........................................................ 8

Clock Phase Does not Match When Inputting 8k,16M Clock toBackboard .. ......................................................................... 9


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Clock Chip of This Board Is in Preheat Status.. .......................... 9

Loss of Clock When Input to Board.. ........................................ 9

SDH/SONET fault .. ............................................................... 9

SDH/SONET:Loss of Frame... ................................................ 10 SDH/SONET: Regenerator Section Trace Mismatch/Section TraceMismatch ... ........................................................................ 10

SDH/SONET:MS-AIS,Line Alarm Indication Signal ... ................. 11

SDH/SONET:Multiplexing Section Far-end Reception Failure/LineFar-end Reception Failure ... .................................................. 11

SDH/SONET:Signal Failure... ................................................. 12

SDH/SONET:Signal Deterioration... ........................................ 12

SDH/SONET:Loss of AU-4 Pointer/Loss of Channel Pointer... ...... 13

SDH/SONET:AU-AIS/Channel-AIS... ....................................... 13

SDH/SONET:HP-Trace Mismatch/ Patch Trace Mismatch... ......... 13

SDH/SONET:HP Unassembled/Path Unassembled... .................. 14

DH/SONET:HP Label Mismatch/Path Label Mismatch ... .............. 14

SDH/SONET:HP Remote Reception Failure ... ........................... 14

SDH/SONET:LOM ... ............................................................. 15

SDH/SONET: Loss of TU Pointer/Loss of Virtual Tributary Pointer15

SDH/SONET:Tributary Unit Ala rm Indication Signal/VirtualTributary Alarm Indication Signal........................................... 15

SDH/SONET:LP Remote Defect Indication/Virtual Tributary Remote

Defect Indication... .............................................................. 16 SDH/SONET:LP-RFI/Virtual Tributary-RFI... ............................. 16

SDH/SONET:LP-Trace Mismatch/ Virtual Tributary Trace Mismatch... ..................................................................................... 17

SDH/SONET:LP-Unloaded/Virtual Tributary Unloaded... ............. 18

SDH/SONET:LP Label Mismatch/Virtual Tributary Label Mismatch18

SDH:VC-4 Signal Failure.......................................................19

SDH:VC-4 Signal Deterioration..............................................19

SDH/SONET:Severe B1 Error Code ........................................20

SDH/SONET:Severe B2 Error Code ........................................20 SDH/SONET:Severe B3 Error Code ........................................21

SDH/SONET:Severe BIP-2 Error Code ....................................22

SDH/SONET:MS-Remote Error Indication................................22

SDH/SONET:HP-Remote Error Indication ................................23

SDH/SONET:HP Signal Failure ...............................................23

SDH/SONET:HP Signal Deterioration ......................................24

E3S subcar transmitter direction loss of signal .........................24

Signal of Receiving End of E3S Daughter Card is Lost ...............25

OFF Alarm..........................................................................25


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E3S Daughter Card Receives Alarm Signal Indication ............... 26

Remote Failure Indication..................................................... 26

Board CPU overloaded ......................................................... 27

Excess Temperature of CPU on Board..................................... 27 Board FLASH faults ............................................................. 28

Inter-shelf media plane links abnormal .................................. 28

Capacity of intra-shelf control plane TRUNK communication isinsufficient................... ...................................................... 29

Incorrect Connection of GE Optical Transceiver Module with BoardSlots on Peer-end ............................................................... 29

Internal Port of Board Is Down.............................................. 29

Board Doesn't Exist/ CPU is Long in Reset Status..................... 30

Input Clock Abnormal .......................................................... 31

A (CPU) Subcard Is Online, but Is not Configured in Database ... 31

A (CPU) Subcard Is not Online, but Has Been Configured byDatabase ........................................................................... 31

External Port of Board Is Down ............................................. 32

Exceptional Internal Media Plane Communication..................... 33

DSP Resource Unavailable .................................................... 33

Usage Rate of Board Hard Disk above Threshold...................... 34

Hard Disk Broken................................................................ 34

TRUNK port down ............................................................... 34

Broad Not Tightly Inserted ................................................... 35

SMBUS Error ...................................................................... 35

Error in Rear Board That Mismatches With Front Board............. 36

LVDS Signal Unlocked.......................................................... 36

High Error Rate of Optical Interface ....................................... 36

FPGA Exception .................................................................. 37

Port Link Down ................................................................... 37

Hardware Reliability Down.................................................... 37

PLL Work Mode Abnormal..................................................... 38

The Channel in a Subcard Is Down ........................................ 38

Subcard Abnormal .............................................................. 38

Phase-lock Loop Unlock ....................................................... 39

High Error Rate at E1 Bottom Layer ....................................... 39

Control Plane Ports of Backplane Joining Switching Chip IsExceptional ........................................................................ 39

Type A Fault on Board (GPS) Phase-lock Equipment................. 40

Type B Fault on Board (GPS) Phase-lock Equipment................. 40

Phase-lock Equipment of This Board (GPS) Is in Power-on Status

........................................................................................ 40


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DSP Reports Exceptions After Detection..................................40

Loss of Clock When Input to Sub-card ....................................41

Error of LVDS Path Frame Detection.......................................41

Tier1 Network Link Loopback Diagnosis Failure ........................42 Physical link down between master port and slave port .............42

Media interactive GE port link down .......................................42

Board device is abnormal .....................................................43

Cx29704 Runs Abnormally....................................................43

Physical Channel for Data Transmission Blocked ......................43

2350 receive hardware error .................................................44

Fe IMA Group is in config-aborted state (because of unmatchedFrame length).....................................................................44

All High-Speed Links Between Line Card and Package SwitchingBoard Are out of Synchronism...............................................45

APS Channels Mismatched ....................................................45

APS Modes Mismatched........................................................46

Board Resets for APS Configuration Changes ...........................46

No Response to Requesting Database for Secondary ForwardingTable Information................................................................47

No Response to Requesting the System for Secondary ForwardingTable Port Information ......................................................... 47

Resource board Unable to Get Secondary Forwarding Table fromUIM...................................................................................48

Internal Connection Chip Faults of TSNB.................................48

Semi-Fixed Connection Error.................................................48

CLKG 32M output clock lost ..................................................49

CLKG 32M8K output clock lost...............................................49

CLKG 16M output clock lost ..................................................49

CLKG 16M8K output clock lost...............................................49

CLKG PP2S Output Clock Lost................................................50

PP2S clock reference lost......................................................50

16CHIP clock reference lost ..................................................50 All clock bases had lost ........................................................51

CLKG I2MB0 clock base lost ..................................................51

CLKG I2MB1 clock base lost ..................................................51

CLKG I2MHZ0 clock base lost ................................................51

CLKG I2MHZ1 clock base lost ................................................52

CLKG I8KBASE clock base lost............................................... 52

CLKG I8KGPS clock base lost ................................................52

CLKG I8KUIM clock base lost.................................................52

Clock reference source lost (Level 3 alarm) .............................53


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Clock reference source lost (Level 2 alarm)............................. 53

Clock reference source lost (Level 1 alarm)............................. 53

Clock Base Lost .................................................................. 54

CLKG board PLL out-of-lock .................................................. 54 Output clock lost................................................................. 54

DSP over load .................................................................... 54

80g chip abnormal .............................................................. 55

SCCP SSN is invalid............................................................. 55

Broadband link congestion ................................................... 56

Broadband link overload ...................................................... 57

MTP2 link transmission overload............................................ 57

MTP3 office inaccessible............................. .......................... 58

MTP3 link unavailable .......................................................... 59 MTP3 cluster inaccessible ..................................................... 59

MTP3 link congestion........................................................... 60

M3UA office inaccessible ...................................................... 61

SUA SSN is invalid .............................................................. 62

SUA office inaccessible......................................................... 63

M2PA Link Broken ............................................................... 63

BSC IP configuration error.................................................... 64

T-net center fault................................................................ 65

EPU and RPU Version Not Match............................................ 65

Abnormal Status in SDH/SONET............................................ 65

SDH/SONET:Excessive Error Code ......................................... 66

ATM Communication Abnormally ........................................... 67

MCC Abnormal.................................................................... 67

MS APS Channel gets errors ................................................. 67

Dry Contact Alarm 1............................................................ 68









Dry Contact Alarm 10 .......................................................... 70




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EAM Dry Contact Alarm 1 .....................................................71



EAM Dry Contact Alarm 4 .....................................................71 EAM Dry Contact Alarm 5 .....................................................72




CMM/CMB FLASH programming failure ...................................73

Power overvoltage/undervoltage alarm...................................73

13M input clock failure .........................................................73

Frame No. inconsistent between software and hardware ...........73

FCLK clock failure................................................................74 SYNCLK clock failure............................................................74

Master and slave communication link failure............................74

Standby CMM/CMB board not present.....................................75

Standby CMM/CMB board abnormal .......................................75

CMM/CMB power failure alarm...............................................75

A interface E1 Rx carrier alarm..............................................76

A interface E1 Rx frame not synchronized ...............................76

A interface E1 Tx forward sliding indication .............................77

A interface E1 Tx backward sliding indication........................... 77

A interface E1 Rx forward sliding indication .............................78

A interface E1 Rx backward sliding indication...........................79

B interface E1 Rx carrier alarm..............................................79

B interface E1 Rx frame not synchronized ...............................80

B interface E1 Tx forward sliding indication .............................81

B interface E1 Tx backward sliding indication...........................81

B interface E1 Rx forward sliding indication .............................82

B interface E1 Rx backward sliding indication...........................82

C interface E1 Rx carrier alarm..............................................83

C interface E1 Rx frame not synchronized ...............................84

C interface E1 Tx forward sliding indication .............................84

C interface E1 Tx backward sliding indication...........................85

C interface E1 Rx forward sliding indication .............................86

C interface E1 Rx backward sliding indication ..........................86

D interface E1 Rx carrier alarm..............................................87

D interface E1 Rx frame not synchronized...............................87

D interface E1 Tx forward sliding indication .............................88


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D interface E1 Tx backward sliding indication .......................... 89

D interface E1 Rx forward sliding indication ............................ 89

D interface E1 Rx backward sliding indication .......................... 90

E interface E1 Rx carrier alarm.............................................. 91 E interface E1 Rx frame not synchronized............................... 91

E interface E1 Tx forward sliding indication ............................. 92

E interface E1 Tx backward sliding indication .......................... 92

E interface E1 Rx forward sliding indication............................. 93

E interface E1 Rx backward sliding indication .......................... 94

F interface E1 Rx carrier alarm.............................................. 94

F interface E1 Rx frame not synchronized............................... 95

F interface E1 Tx forward sliding indication ............................. 96

F interface E1 Tx backward sliding indication........................... 96 F interface E1 Rx forward sliding indication ............................. 97

F interface E1 Rx backward sliding indication .......................... 97

G interface E1 Rx carrier alarm ............................................. 98

G interface E2 Rx frame not synchronized .............................. 99

G interface E1 Tx forward sliding indication............................. 99

G interface E1 Tx backward sliding indication ........................ 100

G interface E1 Rx forward sliding indication .......................... 101

G interface E1 Rx backward sliding indication ........................ 101

H interface E1 Rx carrier alarm ........................................... 102

H interface E3 Rx frame not synchronized............................. 102

H interface E1 Tx forward sliding indication........................... 103

H interface E1 Tx backward sliding indication ........................ 104

H interface E1 Rx forward sliding indication........................... 104

H interface E1 Rx backward sliding indication ........................ 105

Temperature alarm ........................................................... 106

Fan absent....................................................................... 106

Fan control board CPU alarm .............................................. 106

Fan control board CPU alarm .............................................. 106

Fan temperature alarm ...................................................... 107

Fan 1 alarm ..................................................................... 108

Fan 2 alarm ..................................................................... 108

Fan control board alarm..................................................... 109

LNA alarm........................................................................ 109

Tower amplifier power alarm .............................................. 110

SWR of AEM HYCOM minor alarm ........................................ 110

SWR of AEM HYCOM major alarm........................................ 110


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AEM power alarm(BTS V2).................................................. 111

AEM type alarm(BTS V2) .................................................... 111

AEM absent(BTS V2).......................................................... 111

AEM power alarm .............................................................. 112 LNA0 alarm ...................................................................... 112

LNA1 alarm ...................................................................... 112

Tower Amplifier0 power alarm............................................. 112

Tower Amplifier1 power alarm............................................. 113

SWR of AEM HYCOM minor alarm......................................... 113

SWR of AEM HYCOM major alarm ........................................ 113

AEM type alarm ................................................................ 114

AEM Not-in-position alarm .................................................. 114

CHP DSP0 of TPU initialization failure(BTS V2) ....................... 114 CHP DSP1 of TPU initialization failure ................................... 115

CHP DSP2 of TPU initialization failure ................................... 115

CHP DSP3 of TPU initialization failure ................................... 116

Uplink of ADC chip initialization failure.................................. 116

Uplink of ADC resource can't be used ................................... 117

CIP resource can't be used ................................................. 117

Uplink failure .................................................................... 117

TPU FLASH Memory failure(BTS V2) ..................................... 118

Watchdog of TPU CHP DSP0 overflow(BTS V2)....................... 118

Watchdog of TPU CHP DSP1 overflow ................................... 118



Watchdog of FUC overflow.................................................. 120

CIP of TPU initialization failure............................................. 120

Watchdog of TPU CIP overflow ............................................ 120

Clock alarm for TPU and CMM.............................................. 121

TPU power alarm(BTS V2) .................................................. 121

TPU frame No. alarm ......................................................... 121

TPU CHP DSP0 initialization failure ....................................... 122

ADC resource unavailable ................................................... 122

CHP frame error ................................................................ 123

BURST interrupt error ........................................................ 123

TPU FLASH memory failure ................................................. 123

TPU CHP DSP0 watchdog overflow ....................................... 124

CU intialization failure ........................................................ 124

TPU power alarm............................................................... 124


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TPU's FN alarm ................................................................. 125

Rx PLL1 unlock ................................................................. 125

Rx PLL2 unlock ................................................................. 125

Tx PLL1 unlock ................................................................. 126 Tx PLL2 unlock ................................................................. 126

52M referenced clock PLL unlock ......................................... 126

Tx IF PLL unlock ............................................................... 127

EEPROM resource can't be used .......................................... 127

FPGA interface failure ........................................................ 127

PA VSWR alarm(BTS V2).................................................... 127

PA overtemperature minor alarm(BTS V2) ............................ 128

PA overtemperature major alarm(BTS V2) ............................ 128

PA output power alarm ...................................................... 129 PA power overvoltage........................................................ 129

PA power lower voltage...................................................... 129

Downlink checksum error of DLRC_AL1 ................................ 130

DUC chip initialization failure .............................................. 130

80w PA VSWR alarm.......................................................... 130

80w PA overtemperature.................................................... 130

80w PA overtemperature major alarm.................................. 131

80w PA output power alarm................................................ 131

80w PA power overvoltage ................................................. 132

80w PA power lower voltage............................................... 132

80w PA absent ................................................................. 132

TXIF unlock...................................................................... 133

TPF unlock ....................................................................... 133

TXRF unlock..................................................................... 133

RXRF unlock..................................................................... 133

13 MHz clock lost .............................................................. 134

60 ms clock lost................................................................ 134

8M clock of HW lost........................................................... 135

8K clock of HW lost ........................................................... 135

52 MHz clock lost .............................................................. 135

First ADC clock lost ........................................................... 136

Second ADC clock lost ....................................................... 136

PA power overvoltage alarm ............................................... 136

PA power undervoltage alarm ............................................. 137

PA VSWR alarm ................................................................ 137

PA temperature minor alarm............................................... 137


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PA temperature major alarm............................................... 138

PA forward power(3db) alarm ............................................. 138

RTU power alarm .............................................................. 138

RTU power temperature alarm ............................................ 139 RTU power output overvoltage alarm ................................... 139

RTU power input failure alarm............................................. 139

IQ calibration parameters abnormal alarm ............................ 140

EAM heat exchanger alarm ................................................. 140

EAM TRX layer fan-4 alarm ................................................. 140

EAM AEM layer axis-flow fan alarm ...................................... 140

EAM smoke alarm.............................................................. 141

EAM waterproof alarm........................................................ 141

EAM lightning protection alarm............................................ 141 EAM backdoor access control alarm...................................... 141

EAM frontdoor access control alarm ..................................... 142

EAM PWR monitoring unit alarm .......................................... 142

EAM heat exchanger electric heater alarm............................. 142

EAM heat exchanger control board alarm .............................. 143

EAM heat exchanger external circulation fan 2 alarm .............. 143

EAM heat exchanger external circulation fan 1 alarm .............. 143

EAM heat exchanger internal circulation fan 2 alarm............... 144

EAM heat exchanger internal circulation fan 1 alarm............... 144

EAM heat exchanger 485 communication alarm ..................... 144

EAM temperature alarm ..................................................... 145

EAM TRX layer mixed-flow fan 1 alarm ................................. 145



Power undervoltage alarm .................................................. 146

Inner fan 2 alarm (for M8202)............................................. 146

Inner fan 1 alarm (for M8202)............................................. 147

Outer fan 2 and fan 4 alarm (for M8202) .............................. 148

Outer fan 1 and fan 3 alarm (for M8202) .............................. 148

Rack temperature minor alarm............................................ 148

Rack temperature major alarm............................................ 149

Layer 3 fan 1 alarm (for M8206).......................................... 149






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Layer 2 fan 3 alarm (for M8206) ......................................... 151



Layer 1 fan 3 alarm (for M8206) ......................................... 152 FR device failure ............................................................... 152

FR congestion................................................................... 153

MSC overload control alarm at FUC mode ............................. 153

CPU overload control alarm at FUC mode.............................. 153

Signaling point congestion control alarm at FUC mode............ 154

MSC overload control alarm at SYS mode ............................. 154

CPU overload control alarm at SYS mode.............................. 154

Signaling point congestion control alarm at SYS mode............ 155

CCCH overload control ....................................................... 155 PCCCH overload control ..................................................... 155

NSVC failure alarm............................................................ 156

alarm of CRC verifying of power amplifier parameters error..... 156

DSP initialization failure ..................................................... 156

Tx PLL unlock ................................................................... 157

FLASH memory fault ......................................................... 157

Run abnormity of DSP ....................................................... 157

FPGA interface fault........................................................... 158

CHP frame fault ................................................................ 158

Wrong receive channel of RF .............................................. 158

Wrong parameter configuration for EEPROM.......................... 159

RF channel and HTRG board unconformity ............................ 159

OMP reboot alarm ............................................................. 159

TRX Man Block ................................................................. 159

Resource cannot be used of RF Channel ............................... 160

SYNCLK locked fail alarm ................................................... 160

Status of TX1 filter alarm ................................................... 160




FCU power undervoltage alarm ........................................... 161

FCU minor alarm............................................................... 162

Hard disk initialization failure.............................................. 162

The clock alarm about transmission of CCI board Abis-E1 ....... 162

The local working clock alarm of CCI board........................... 163

The clock alarm about transmission of CCI board 13M............ 163


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CCI opposite board alarm ................................................... 163

IQ FPGA internal clock alarm............................................... 164

IQ FPGA light interface alarm.............................................. 164

IQ FPGA LVDS interface alarm............................................. 164 IQ FPGA internal data alarm ............................................... 164

13M,61.44M clock lost alarm............................................... 164

60ms clock lost alarm ........................................................ 165

26MHz and 52MHz lost of clock alarm................................... 165

the failure examination alarm of the 60ms uplink frame.......... 166

checking block data error alarm........................................... 166

up link LVDS SERDES lost lock alarm ................................... 166

FN error alarm .................................................................. 167

receiving channel frequent alarm......................................... 167 transmiting channel frequent alarm...................................... 167

the lost alarm of 60ms ....................................................... 167

output power less than 6DB................................................ 168

HYCOM major alarm .......................................................... 168

the input power is abnormal ............................................... 168

out of power alarm ............................................................ 168

the lost of signal of the light port 4 alarm ............................. 169


light port 2 error,Loss of Frame alarm .................................. 169


light port 1 error,Loss of Frame alarm .................................. 170

FR device failure ............................................................... 170

the version checking CRC error alarm................................... 170

Diversity antenna lost ........................................................ 170

Diversity antenna identical.................................................. 171

A Interface Resource Statistics Alarm................................... 171

NSVC Resource Statistics Alarm........................................... 172

TCH Resource Statistics Alarm............................................. 172

Assignment Failure ............................................................ 172

Communication Alarms ................................................ 173

Exceptional Connection Setup ............................................. 173

Trunk Frame Loss.............................................................. 173

Trunk Signal Loss .............................................................. 174

Trunk Alarm Indication....................................................... 174

Trunk Multi-frame Loss ...................................................... 175

Far-End CRC Multi-frame Alarm Indication ............................ 175


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Far End Alarm .................................................................. 175

Communication Link between Active and Standby Boards Off .. 176

Incorrect FE Routing Connection ......................................... 176

Board HW Error ................................................................ 177 Communication between environment monitoring board and OMPboard abnormal ................................................................ 178

RAWMACIP Channel Communication Exception...................... 178

test pack check abnormal................................................... 179

MAC Address Conflict Exists in Boards of Same Shelf............. 179

IPMAC Conflict When OSS Detects Control Plane.................... 179

dualhome office block........................................................ 180

dualhome link block .......................................................... 180

dualhome association block ................................................ 181 Recive bad packet............................................................. 181

Faulty Frames Received by FE/GE/ATM/MP/POS/E1 Port ......... 182

Faulty Frames Received by Internal Switching Interface Faulty 183

HDLC unavailable.............................................................. 183

UID unavailable ................................................................ 184

UID unavailable ................................................................ 184

Far End IMA Group is in Startup state .................................. 185

FE is in blocked state......................................................... 185

Timing of Near-End IMA Group Failure ................................. 185 FE RXLSM is in Unusable State............................................ 186

Implementation specific TX fault declared at the NE............... 186

Near-End Sending Link Broken............................................ 186

Near-End Sending Link Broken............................................ 187

LODS Alarm of Near-End Receiving Link ............................... 187

RDI Alarm of Near-End Receiving Link.................................. 187

Near-End Receiving Link Faults ........................................... 188

Implementation specific Rx failed declared at the NE.............. 188

Near-End Receiving Link Broken.......................................... 188

Far end TXLSM is in Unusable State..................................... 189

Fe IMA Group's part of links are possibly arp looped back ....... 189

Remote Receiving Link ID Mismatched ................................. 189

BFD Session Interrupted .................................................... 190

Abis link broken................................................................ 190

Control plane communication abnormal between board and itshome module ................................................................... 191

Control plane communication abnormal between MP and OMP . 192

Association link broken ...................................................... 192


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STC office inaccessible ....................................................... 193

PPP_UID Link Down ........................................................... 194

PPP Link Down .................................................................. 194

HDLC unavailable .............................................................. 195 UID unavailable ................................................................ 195

Association path broken ..................................................... 196

PPP link broken ................................................................. 196

BSCIP configuration error in database .................................. 197

MGW not registered............................ ............................... 198

Dual Homing Office Blocked ................................................ 198

Dual Homing Link Blocked .................................................. 199

Dual Homing Association Blocked......................................... 199

Trunk error....................................................................... 200 Trunk abnormal ................................................................ 200

The rate of error code in a matelink is high at GUIM ............... 201

FE Link Error Alarm ........................................................... 201

Link Broken Between Server and Alarmbox ........................... 201

HW link broken ................................................................. 202

Master rack communication link alarm.................................. 203

Communication link alarm between master and slave rack (left)...................................................................................... 203

Communication link alarm between master and slave rack (right)...................................................................................... 203

A interface E1 remote alarm ............................................... 204

B interface E1 remote alarm ............................................... 204

C interface E1 remote alarm ............................................... 205

D interface E1 remote alarm ............................................... 205

E interface E1 remote alarm................................................206

F interface E1 remote alarm................................................ 206

G interface E1 remote alarm ............................................... 207

H interface E1 remote alarm ............................................... 207 LAPD communication link between FUC and BSC break ........... 208

Communication link between CMM and FUC break(BTS V2) ..... 208

HDLC communication link between CMB and FUC broken ........ 209

LAPD communication link between FUC and BSC broken ......... 210

CU parameter configuration error ........................................ 210

Communication broken between EAM and CMB...................... 211

BSC LAPD communication link broken .................................. 211

Site LAPD communication link broken................................... 211

Cell interruption alarm ....................................................... 212


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Front-end communication link broken alarm ......................... 212

Control link broken............................................................ 213

Operation link broken(CS).................................................. 213

Operation link broken(PS) .................................................. 213 Handling Alarms ......................................................... 214

Process Instance Configuration Error ................................... 214

T Network Connection Not Conform to Configuration .............. 214

DB Config Doesn't Fit for Device.......................................... 215

OMC Gateway Mask Different from DBs................................ 215

Alarm Due to Inconsistent Area Code................................... 215

Alarm Due to Inconsistent Mac Address of Background OMP(OMC)...................................................................................... 216

Alarm Due to Inconsistent Mac Address of Background OMP(OMC)...................................................................................... 216

Alarm Due to Inconsistent MP Type ..................................... 216

Startup File Does Not Exist ................................................. 217

OMP GateWay IP Different from DBs.................................... 217

OMC Server IP Different from Dbs ....................................... 217

OMC Gateway Mask Different from DBs................................ 217

OMP Config Changes ......................................................... 218

Inconsistent Office ID Settings of DIP Switch ........................ 218

Port Work Mode Doesn't Match Settings ............................... 218

Formats of audio resource inconsistent................................. 219

Version Switches While Board Doesn't Reset ......................... 219

Function EPLD Update Failure ............................................. 220

Inconsistent BOOT/EPLD Version No. with Database Configurations...................................................................................... 220

Boot Version Fails to Be Written to Backup Region ................. 220

Microcode Is Abnormal ...................................................... 221

PVC Fault......................................................................... 221

FE reports unacceptable configuration parameters(M size) ...... 222

Fe IMA Group is in config-aborted state (because of unmatchedsymmertry mode) ............................................................. 222

Fe IMA Group is in config-aborted state (because of unmatchedOAM lable)....................................................................... 222

Fe IMA Group is in config-aborted state (because of other reseans)...................................................................................... 223

FE is in Insufficient links State ............................................ 223

Near-End IMA Group Configuration Failure............................ 223

NE Group is in Insufficient links State .................................. 224

Number of Alarms Over Threshold ....................................... 224


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Board Connection Check is Off............................................. 224

Access DSP's HPI memory error ......................................... 225

The config data of sntp in DBS is wrong................................ 225

The Client Of Sntp Failed In Fetching Net Time ...................... 225 SNTP failure ..................................................................... 226

Number of management module alarms exceeds the threshold 227

NTP time exceeds threshold ................................................ 227

brs main config request timeout .......................................... 228

brs main epu register timeout ............................................. 228

Database config is different from file named bootcfg ini. ......... 229

Wrong Parameter configuration for TPU Ch0.......................... 229


Wrong Parameter configuration for TPU Ch2.......................... 230 Wrong Parameter configuration for TPU Ch3.......................... 230





Cell configuration parameter mismatch(BTS V2) .................... 232

Software version of FUC mismatch(BTS V2) .......................... 233

Software version of CHP mismatch(BTS V2) .......................... 233

L3 Software of FUC No Response(BTS V2)............................. 233

Wrong Parameter configuration for CIP................................. 234

Software version of CIP mismatch........................................ 234

Wrong parameter configuration for TRM Channel 0................. 234








Cell configuration parameter mismatch................................. 238

FUC Software version mismatch .......................................... 238

CHP Software version mismatch .......................................... 238

CU Software version mismatch............................................ 239

FUC L3 Software no response.............................................. 239

Parameter configuration mismatch....................................... 239

Parameter configuration failure of AD6537 ............................ 240


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Environment Alarms .................................................... 240

Cell delineation do not synchronization about cell on E1 link... 240

RACK Temperature Over Alarm Threshold............................. 240

RACK Temperature Lower Than Alarm Threshold ................... 241 House temperature is higher than high threshold................... 241

House temperature is lower than high threshold .................... 242

Any one of rack voltage inputs above threshold..................... 242

Any one of rack voltage inputs below threshold ..................... 242

Temperature in equipment room above threshold .................. 243

Temperature in equipment room below threshold .................. 243

Rack fans faults ................................................................ 244

Rack door access control alarm ........................................... 244

Smoke alarm.................................................................... 244

Infrared alarm.................................................................. 245

Lightning alarm ................................................................ 245

SNTP server invalid ........................................................... 245

Fault on Board (GPS)......................................................... 246

QoS Alarms ................................................................ 246

Inter-board Message Communication Flow Rate Over AlarmThreshold ........................................................................ 246

Inter-board Message Communication DSP overload (Level 1 alarm)

...................................................................................... 247 Inter-board Message Communication DSP overload (Level 2 alarm)...................................................................................... 247

Inter-board Message Communication DSP overload (Level 3 alarm)...................................................................................... 247

MTP2 link reception overload .............................................. 248

Association congested ....................................................... 248

STC office congested ......................................................... 249

Appendix A...................................................................251

Abbreviations ...............................................................251

Tables ...........................................................................259

Index ............................................................................261


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Confidential and Proprietary Information of ZTE CORPORATION i

About This Manual

Purpose

This manual describes BSS (V6.20) related alarm messages interms of alarm cause, influence, and handling suggestions. Youcan analyze, locate, and handle faults by referring to this

document.

Intended Audience

This manual is intended for engineers and technicians whoperform operation activities on the ZXG BSS.

Prerequisite Skill and Knowledge

To use this manual effectively, users should have a generalunderstanding of wireless telecommunications technology.Familiarity with the following is helpful:

ZXG system and its various components

User interfaces on the Mobile Switching Center (MSC)

Local operating procedures

What Is in This Manual

This manual contains the following chapters:

T A B L E 1 C H A P T E R S U M M A RY

Chapter Summary

Chapter 1, AlarmMessages

Introduces the basic concepts of BSS(V6.20) alarms, including alarm definition,severity, handling suggestions, andclassification

Chapter 2, AlarmMessage Description

Describes the BSS (V6.20) alarms in termsof alarm cause, influence on the system,


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ZXG10 BSS (V6.20) Base Station Subsystem Alarm Handling Manual

ii Confidential and Proprietary Information of ZTE CORPORATION

Chapter Summary

and handing flow.

Related Documentation

The following documentation is related to this manual:

ZXG10 iBSC (V6.20) Base Station Controller DocumentationGuide

ZXG10 iBSC (V6.20) Base Station Controller TechnicalManual

ZXG10 iBSC (V6.20) Base Station Controller HardwareManual

ZXG10 iBSC (V6.20) Base Station Controller InstallationManual

ZXG10 iBSC (V6.20) Base Station Controller PerformanceCounters Manual Volume I

ZXG10 iBSC (V6.20) Base Station Controller KPI ReferenceManual

ZXG10 iBSC (V6.20) Base Station Controller MaintenanceManual (Routine Maintenance)

ZXG10 iBSC (V6.20) Base Station Controller MaintenanceManual (Troubleshooting)

ZXG10 iBSC (V6.20) Base Station Controller MaintenanceManual (Emergency Maintenance)

ZXG10 BSS (V6.20) Base Station Subsystem NotificationHandling Manual

ZXG10 BSS (V6.20) Base Station Subsystem OMM SofrwareInstallation Manual

ZXG10 BSS (V6.20) Base Station Subsystem ConfigurationManual (Initial Configuration Guide)

ZXG10 BSS (V6.20) Base Station Subsystem ConfigurationManual (Feature Configuration Guide)

ZXG10 BSS (V6.20) Base Station Subsystem MML CommandManual

ZXG10 BSS (V6.20) Base Station Subsystem RadioParameters Manual

ZXG10 BSS (V6.20) Base Station Subsystem OperationManual (Diagnosis and Test)

ZXG10 BSS (V6.20) Base Station Subsystem Operation

Manual (Signaling Tracing)


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About This Manual

Confidential and Proprietary Information of ZTE CORPORATION iii

ZXG10 iBSC (V6.20) Base Station Controller PerformanceCounter Manual - Volume II

ZXG10 iBSC (V6.20) Base Station Controller PerformanceCounter Manual - Volume III

In this manual, ZXG10 iBSC (V6.20) and ZXG10 BSC (V2) arereferred to as BSC, and iBSC refers to only ZXG10 iBSC.

Conventions

ZTE documents employ the following typographical conventions.

T A B L E 2 T Y P O G R A P H I C A L C O N V E N T I O N S

Typeface Meaning

Italics References to other Manuals and documents.

Quotes Links on screens.

Bold Menus, menu options, function names, inputfields, radio button names, check boxes, drop-down lists, dialog box names, window names.

CAPS Keys on the keyshelf and buttons on screens andcompany name.

Const ant wi dt h Text that you type, program code, files anddirectory names, and function names.

[ ] Optional parameters.

{ } Mandatory parameters.

| Select one of the parameters that are delimitedby it.

Note: Provides additional information about acertain topic.

Checkpoint: Indicates that a particular step needsto be checked before proceeding further.

Tip: Indicates a suggestion or hint to make thingseasier or more productive for the reader.

T A B L E 3 M O U S E O P E R AT I O N C O N V E N T I O N S

Typeface Meaning

Click Refers to clicking the primary mouse button (usuallythe left mouse button) once.

Double-click Refers to quickly clicking the primary mouse button(usually the left mouse button) twice.

Right-click Refers to clicking the secondary mouse button(usually the right mouse button) once.

Drag Refers to pressing and holding a mouse button and

TypographicalConventions

MouseOperation

Conventions


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iv Confidential and Proprietary Information of ZTE CORPORATION

Typeface Meaning

moving the mouse.

How to Get in Touch

The following sections provide information on how to obtainsupport for the documentation and the software.

If you have problems, questions, comments, or suggestionsregarding your product, contact us by e-mail [email protected]. You can also call our customer supportcenter at (86) 755 26771900 and (86) 800-9830-9830.

ZTE welcomes your comments and suggestions on the qualityand usefulness of this document. For further questions,comments, or suggestions on the documentation, you cancontact us by e-mail at [email protected]; or you can fax yourcomments and suggestions to (86) 755 26772236. You can alsobrowse our website at http://support.zte.com.cn, which containsvarious interesting subjects like documentation, knowledge base,forum and service request.

CustomerSupport

DocumentationSupport


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Confidential and Proprietary Information of ZTE CORPORATION v

Declaration of RoHSCompliance

To minimize the environmental impact and take moreresponsibility to the earth we live, this document shall serve asformal declaration that the ZXG10 BSS (V6.20) Base StationSubsystem manufactured by ZTE CORPORATION is in

compliance with the Directive 2002/95/EC of the EuropeanParliament - RoHS (Restriction of Hazardous Substances) withrespect to the following substances:

Lead (Pb)

Mercury (Hg)

Cadmium (Cd)

Hexavalent Chromium (Cr(VI))

PolyBrominated Biphenyls (PBBs)

PolyBrominated Diphenyl Ethers (PBDEs)

The usage of the above substances in ZXG10 BSS (V6.20) isexplained in Table 4.

T A B L E 4 U S A G E E X P L A N AT I O N O F T H E H A Z A R D O U S S U B S TA N C E S I N Z X G 1 0 B S S ( V 6 . 2 0 )

Hazardous substances

Names of Parts

Pb Hg Cd Cr(VI) PBBs PBDEs

System 0 0 0 0 0Cables and Assembly 0 0 0 0 0 0

Auxiliary Equipment

Table Explanation:

0: The usage of the substance in all of the components is lessthan the allowed values given by 2002/95/EC standard.

: The usage of the substance in at least one of the componentsis beyond the allowed values given by 2002/95/EC standard.


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vi Confidential and Proprietary Information of ZTE CORPORATION

The ZXG10 BSS (V6.20) Base Station Subsystem manufacturedby ZTE CORPORATION meet the requirements of EU2002/95/EC; however, some assemblies are customized to clientspecifications. Addition of specialized, customer-specifiedmaterials or processes which do not meet the requirements ofEU 2002/95/EC may negate RoHS compliance of the assembly.To guarantee compliance of the assembly, the need forcompliant product must be communicated to ZTE CORPORATIONin written form.

This declaration is issued based on our current level ofknowledge. Since conditions of use are outside our control, ZTECORPORATION makes no warranties, express or implied, andassumes no liability in connection with the use of thisinformation.


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Confidential and Proprietary Information of ZTE CORPORATION 1

C h a p t e r

1

Alarm Message Summary

This chapter introduces the basic concepts of alarm messages,

such as alarm code definition, alarm severity level, alarmhandling suggestions, and alarm classification.

Alarm Code DefinitionAn alarm code is defined by a string of 32 bits, which indicatesthe code values of a specified alarm message.

The range of GSM BSS alarm codes is as follows:

1 ~ 100000

198000000 ~ 198065535

198066000 ~ 198079999

198087000 ~ 198089999

198099800 ~ 198099801

Alarm Severity Level

Whenever there is a problem or fault during BSC operation, an

alarm message appears. Usually, the alarm may last till theproblems or faults are rectified.

According to severity, alarms are divided into four levels:

Critical (level 1)

Critical alarms cause the whole system to fail to operate orprovide services. Measures must be taken to recover oreliminate the alarms immediately.

Major (level 2)

Severe alarms greatly affect the system operation or resultin severe degradation in performance of service provision.


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2 Confidential and Proprietary Information of ZTE CORPORATION

Measures must be taken to recover or eliminate the alarmsas soon as possible.

Minor (level 3)

Major alarms do not greatly affect normal system operationand performance of service provision. Measures should betaken to recover or eliminate the alarms in time to avoidmore severe alarms.

Warning (level 4)

Minor alarms have potential effects on normal systemoperation and performance of service provision. Diagnosisand measures should be taken to avoid more severe alarms.

In alarm level definition, the affected range only refers to theinfluence on a single item, that is, alarm level can be determinedif a certain index, such as reliability and safety, reaches the

specified range. If an alarm affects several indices, the alarmlevel should be upgraded.

Note:

Alarm levels can be modified in the Netnumen M31 EMSsystem based on the actual situations.

Generally, the default settings are comparatively reasonable.Be cautious when re-defining levels. It is not allowed tomodify the settings at will.

In addition, some alarm levels are not defined. For these alarms,users can define their levels in actual situations.

Alarm HandlingPay attention to the following points when handling alarms:

After noting down the problem and symptom, systemmaintenance personnel should handle the alarms step bystep by referring to the solutions described in this manual.Unless otherwise specified, end the alarm handling once thefault is rectified (that is, the alarm is recovered), or go to thenext step if the problem persists.

If the alarm fails to be handled or recovered, contact thelocal ZTE office.


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Chapter 1 Alarm Message Summary


Alarm Classification

The BSS related alarm messages on Netnumen M31 can beclassified into the following six types:

Equipment alarms

Communication alarms

Handling alarms

Environment alarms

QoS alarms


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C h a p t e r

2

Alarm Messages

This chapter gives a comprehensive and systematic description

of the BSS (V6.20) related alarm messages, which helps systemmaintenance personnel to have a clear idea about every alarmgenerated at the BSS side. This chapter explains:

Alarm cause

Influence on the system

Handling method

Equipment Alarms

Loss of Optical Transceiver ModuleSignal

Alarm code: 198000002

Alarm level: 2

The local-end RX fiber or peer-end TX fiber is not properlyconnected.

The local or peer-end optical transceiver module is faulty. The peer end does not export optical signals forcibly.

The UIM has no TFS subcard or the board does not provideTDM optical interface function.

The link connected to the fiber circuit is broken and the serviceis interrupted.

1. Correctly insert the local and the peer-end fibers and check ifthe alarm is eliminated.

2. Replace the fiber and check if the alarm is eliminated.

Alarm Property

Alarm Cause

Influence

Handling Flow


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3. Replace the local-end optical transceiver module and check ifthe alarm is eliminated.

4. Replace the peer-end optical transceiver module and check ifthe alarm is eliminated.

5. Check if the peer-end device forcibly inhabits output and ifthe alarm is eliminated.

UIM consists of UIMC, UIMU, and UIMT.

Ethernet Controller's Physical LinkOff


Alarm level: 3

The network cables are not connected to the OMC1 andOMC2 interfaces on the rear shelf.

The network cable fails or looses.

The network interfaces on the shelf are faulty.

A link connected to the Ethernet is broken. The symptom isthat the OMC interface is disconnected, that is, thecommunication between the NE and the EMS server isbroken.

1. Check if network interface OMC2 is connected with networkcables and if they are loose.

If the cables loose, go to step 2.

If the cables are not loose, go to step 3.

2. Insert cables to OMC2 on both ends again and check if thealarm is eliminated.

3. Replace the cables for OMC2 and check if the alarm iseliminated.

4. Use crossover cables and straight cables for OMC2 and checkif the alarm is eliminated.

Trunk Link Is Used for CSULoopback Test


Alarm level: 3

The equipment at end A sends CSU link building code to end B,and this trunk link is set to loopback at end B. Then, CSU test

Remarks

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause


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Chapter 2 Alarm Messages


starts. If this trunk link is not used for CSU loopback test, thisalarm won't be triggered.

The configured trunk link is congested.

After diagnosis and test, do some settings, where end A sendsthe command of canceling CSU loopback to end B.

Cell Delineation Not Synchronized


Alarm level: 3

The HEC is damaged. The cell cannot be located from thephysical layer frame. This problem is usually triggered frombottom layer fault. It may also because the local and peer-enddevices use different methods to process HEC.

The ATM communication becomes worse.

1. Check if other alarms are generated accompanying itsoccurrence. If yes, clear these alarms. If no, go to step 2.

2. Check if both ends are configured to SDH mode or SONETmode. If the modes are different, configure a correct signalmode.

Loss of Cell Delineation


Alarm level: 2

LCD is triggered after OCD lasts for 4 ms.

The ATM communication is broken.

1. Check if other alarms are generated accompanying itsoccurrence. If yes, clear these alarms. If no, go to step 2.

2. Check if both ends are configured to SDH mode or SONETmode. If the modes are different, configure a correct signalmode.

8K input clock lose


Alarm level: 3

The clock input of the shelf is abnormal.

The system communication fails.

Check whether the clock input line is correctly connected.

Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow


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16M Input Clock Lose


Alarm level: 3



Check whether the clock input line is correctly connected.

PP2S Clock Input Lose


Alarm level: 3



1. Check if the clock input lines are correctly connected.

2. Check if the subrack of output clock locks the GPS signals.

32M Clock lost in TSNB


Alarm level: 3

As the clock consists of 32M and 8K, the 32M clock alarm isgenerated when the clock (32M or 8K) jitters out of thespecified range and affects the links.

The clock is unavailable.

The whole link is blocked if the alarm is generated. Therefore,the clock cannot be lost. Two boards for reporting alarms areused in a system, with one active and the other one standby.When a clock alarm is generated, the system switches overbetween the active and standby TSNBs.

For Tier 1 network, clock loss means loss of the whole linkdata. The link is recovered only after the clock becomesnormal.

Check if the clock input lines are correctly connected.

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow


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Clock Phase Does not Match WhenInputting 8k,16M Clock to Backboard


Alarm level: 3

The clock input of the shelf is abnormal. The clock line is notreliably connected or faulty.



Clock Chip of This Board Is inPreheat Status


Alarm level: 3

The board experiences reset. The SETS chip and the constant-temperature crystal oscillator needs to be fully preheated.

The output clock is unstable.

Perform normal operations after the board is powered on. Wait

until the clock board is completely preheated. Conduct the clockperformance test only after the preheat ends.

Loss of Clock When Input to Board


Alarm level: 3




SDH/SONET fault


Alarm level: 2

The upstream optical transmission device is faulty.

The optical fiber transmission line is faulty.

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause


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The fiber pigtail and flange between the local-end ODF(optical distribution frame) and equipment are faulty.

The local-end optical receiver is faulty.

All the trunk receiving signals that are transmitted through theSDH/SONET line are interrupted.

1. Use an optical power meter to check if the power forreceiving optical signals is within the specified range (that is,-28 dBm ~ -8 dBm).

If yes, go to step 3

If no, it can be inferred that the optical module is faulty,and then go to step 2.

2. Replace the optical module or board. Check if the alarm iseliminated.

3. Use the transmitting end at the peer-end office to detect thetransmitting optical signal. Check if the signal is within thespecified range.

If yes, go to step 5.

If no, it can be inferred that the peer end is faulty, andthen go to step 4.

4. Ask maintenance personnel to check the peer-end office.After the fault is rectified, check if the alarm is eliminated.

5. Something may be wrong with the transmission equipment.Ask maintenance personnel special for transmission

equipment to do troubleshooting.

SDH/SONET:Loss of Frame


Alarm level: 2

The upstream SDH devices are faulty.


Ask SDH transmission equipment maintenance personnel torectify the faults.

SDH/SONET: Regenerator SectionTrace Mismatch/Section TraceMismatch


Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property


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Alarm level: 2

The optical fiber on the optical distribution frame is incorrectlyconnected during optical fiber cutover and scheduling, or theexpected value is incorrectly set on the network managementsystem.

The matching relations of the trunks and trunk signals are wrong.

1. Check if the fibers are correctly connected to the ODFs atlocal end and peer end.

If yes, go to step 2.

If no, correctly connect the fibers, and then check if thealarm is eliminated.

2. Check if the predefined values of section access pointidentifier at both ends are consistent. If not, set the samevalue. Check whether the alarm is eliminated.

SDH/SONET:MS-AIS,Line AlarmIndication Signal


Alarm level: 2

The upriver equipment has faults, such as LOS, LOF, and RS TIM.


Clear the primary alarm according to the alarm generated fromthe network node equipment in the corresponding multiplexingsection.

SDH/SONET:Multiplexing SectionFar-end Reception Failure/Line Far-end Reception Failure


Alarm level: 3

Errors occur on the uplink direction of the downstreamequipment.

All the trunk sending signals that are transmitted through theSDH/SONET line are interrupted.

Clear the primary alarm according to the alarm generated fromthe network node equipment in the corresponding multiplexingsection.

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow


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SDH/SONET:Signal Failure


Alarm level: 2

For all the NEs in the multiplexing section where the boardresides, the fiber pigtail connectors in the down direction arecontaminated. The increase of transmission line attenuationor change in optical transmission mode leads to error code.

The ADM transmit device is faulty.

All the trunk receiving signals that are transmitted through theSDH/SONET line generate large numbers of alarms.

1. Check if the fiber pigtail heads are contaminated.

If yes, clean the connectors, and then check if the alarmis eliminated.

If no, go to step 2.

2. Use an optical power meter to detect the optical powerattenuation of each connection point in the down direction inthe multiplexing section and find if the value is excessive.

If yes, adjust the attenuation, and then check if thealarm is eliminated.

If no, go to step 3.

3. Ask maintenance personnel for transmission network tocheck if the ADM transmit device is faulty, end the alarmhanding.

SDH/SONET:Signal Deterioration


Alarm level: 3

When signal degrade (SD) and signal fail (SF) occur at the sametime, eliminate SF first. When SD occurs individually, it can beinferred that the ADM transmit device is faulty.Some trunk receiving signals generate various alarms.

1. Eliminate SF, if it occurs. Check if the alarm is eliminated.

2. Check the optical fibers and fiber transceiver modules at thelocal and peer ends. Ensure that the optical fibers are wellconnected and that the optical transceiver module is notloose. Check if the alarm is eliminated.

3. Replace the fiber module or board. Check if the alarm iseliminated.

Alarm Property

Alarm Cause

Influence

Handling Flow

Alarm Property

Alarm Cause

Influence

Handling Flow


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4. Ask maintenance personnel to check the peer-end office andrectify the faults. Check if the alarm is eliminated.

5. Something may be wrong with the transmission equipment.Ask maintenance personnel special for transmissionequipment to do troubleshooting.

SDH/SONET:Loss of AU-4Pointer/Loss of Channel Pointer


Alarm level: 2

The upstream AU-4 pointer processing unit is faulty.

All the trunk receiving signals tha

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