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Chapter 5 R2MFC MBM maintenance 59
Digital Mobility System Installation and Configuration Guide
Group II errors
Group II alarms occur when an alarm persists for a predefined period. The alarm is considered
cleared when it does not occurred for a predefined period.
See Table 9 for incoming-signal Group II errors listed from highest to lowest priority. Group II
errors are ordered by priority; when a high priority error exists, any errors of lower priority are
irrelevant.
Alarms propagation
This section describes the actions taken when alarms occur or stop. When alarms occur, the
far-end is alerted by a remote alarm indication, and an alarm is transmitted on the opposite link.
Table 10 table shows the reactions for Group I alarms when they enter the Out-Of-Service (OOS)
state.
Table 9 Incoming signal errors
Alarm Cause
Loss of Signal (LOS) No reception of incoming electrical signal on the line (cable cut or
removed).
Alarm Indication Signal (AIS) Reception of incoming signal is all ones. Usually indicates that the
far-end is out-of-service
Out-of-Frame (OOF) No detection of Frame Alignment Signal. The incoming signal is
corrupted. This alarm is also known as Loss of Frame (LFA).
Out Of Multiframe TS16 -
(OOM
TS16
)
No detection of Multiframe Alignment Signal. When this alarm is active,
Channel Associated Signaling (R2) is impossible. This alarm is not
applicable to the PRI (internal link). This alarm is also known as Loss of
Multiframe Alignment - (LMA).
Alarm Indication Signal in TS16
(AIS
TS16
)
Reception of AIS is all ones in TS16. This is an optional alarm. It can be
enabled or disabled in configuration. By default, this option is off. When
this alarm is active, any signaling on TS16 is impossible.
Loss of CRC-4 Multiframe
Alignment (OOM)
CRC-4 multiframe cannot be recognized. When this alarm is active,
CRC-4 errors (of group I) cannot be measured. This alarm is relevant
only when CRC-4 multiframe mode is used.
Remote Alarm Indication (RAI) Indication that the far-end has trouble with its incoming signal. This
alarm is also known as yellow alarm.
Remote Alarm Indication TS16
(RAI
TS16
)
Indication that the far-nd has lost TS16 multiframe alignment on its
incoming signal.
This alarm is not applicable to PRI (internal link).
Table 10 Group I Alarms propagation (Sheet 1 of 2)
Error Condition Alarm Transmitted to far end Alarm sent on opposite link
BPV RAI AIS
FBER RAI AIS
Slips RAI AIS
- R2MFC Media Bay Module 1
- Trademarks 2
- Enhanced 911 Configuration 3
- Radio-frequency Interference 3
- Hearing Aid Compatibility 4
- Important Safety Instructions 4
- Limited Warranty 7
- Warranty Repair Services 8
- After Warranty Service 8
- Contents 9
- 14 Figures 14
- Tables 16
- Before you begin 17
- How to get help 18
- Preface 19 19
- Acronyms 20
- Chapter 1 21
- Overview 21
- R2MFC MBM faceplate elements 22
- System Status LEDs 23
- Config DIP switches 23
- RS232 port 24
- E1 Status LEDs 24
- Bantam jacks 24
- BNC and RJ-48 connectors 24
- Power connectors 24
- MBM DIP switches 25
- 26 Chapter 1 Overview 26
- Chapter 2 27
- Installation process map 28
- R2MFC MBM setup requirements 29
- Environment checklist 30
- Electrical requirements 30
- Software requirements 30
- Chapter 3 31
- Installing the R2MFC MBM 31
- Installing an R2MFC MBM 32
- Reconnecting the equipment 33
- Removing an R2MFC MBM 35
- Wiring an R2MFC MBM 37
- Chapter 4 41
- Configuring the R2MFC MBM 41
- Physical line characteristics 42
- E1 framing 42
- Line signaling 42
- Register signaling 43
- End of dialing (outgoing) 44
- Disable ANI 44
- Default category 44
- Default subscriber status 44
- Setting Config DIP switches 45
- E1 Framing 47
- Signaling 48
- Turning on second dial tone 52
- Chapter 5 55
- R2MFC MBM maintenance 55
- Clock synchronization 56
- Diagnostic tools 57
- Alarms Measurements 58
- Alarms propagation 59
- Faceplate LEDs 60
- Logs and traces 61
- Error messages 61
- Replacing an R2MFC MBM 62
- Upgrading firmware 63
- Chapter 6 67
- Command Line Interface (CLI) 67
- Accessing the CLI 68
- Commands 69
- LOad directory 69
- INfo directory 69
- VIew directory 70
- CNtrl directory 71
- COnfig directory 73
- ALarm directory 75
- SWerr directory 77
- MFC directory 78
- R2 directory 81
- PRI directory 83
- Appendix A 85
- Country code defaults 87
- MFC register signaling 88
- Mexico Config 2 89
- Brazil Config 1 92
- Brazil Config 2 94
- Argentina Config 1 96
- N0027684 01 100
- Appendix B 101
- Appendix C 103
- MFC Signal Definitions 103
- 104 MFC Signal Definitions 104
- Appendix D 105
- CLI Cable Pinout 105
- 106 CLI Cable Pinout 106
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