Alarms propagation, Incoming signal errors | Nortel Networks R2MFC

Chapter 6 R2MFC MBM maintenance 65

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 11 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.

Table 11 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 -	No detection of Multiframe Alignment Signal. When this alarm is active,
(OOMTS16)	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	Reception of AIS is all ones in TS16. This is an optional alarm. It can be
(AISTS16)	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	CRC-4 multiframe cannot be recognized. When this alarm is active,
Alignment (OOM)	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	Indication that the far-nd has lost TS16 multiframe alignment on its
(RAITS16)	incoming signal.
	This alarm is not applicable to PRI (internal link).

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 12 table shows the reactions for Group I alarms when they enter the Out-Of-Service (OOS) state.

Table 12 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 Installation and Configuration Guide

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Nortel Networks R2MFC manual Incoming signal errors, Group I Alarms propagation Sheet 1, Alarm Cause

Contents

R2MFC Media Bay Module Installation and Configuration Guide North American Regulatory Information Safety Radio-frequency Interference Enhanced 911 ConfigurationR2MFC Media Bay Module Installation and Configuration Guide Hearing Aid Compatibility Important Safety InstructionsRepairs NN40010-300 International Regulatory Information NN40010-300 Contents Chapter Preparing to install the R2MFC MBM Chapter R2MFC MBM maintenance Appendix a Configuring DIP switch settings and definitions MFC Register Signaling Panama Config 1 NN40010-300 Getting Help over the phone from a Nortel Solutions Center How to Get HelpGetting Help from the Nortel Web site Getting Help through a Nortel distributor or reseller How to Get Help NN40010-300 Audience Getting startedAbout this guide Acronyms Before you begin Symbols and text conventions Convention Example Used for Pswd Related publications Getting started NN40010-300 General information Chapter Overview Overview Administration and maintenance toolsR2MFC MBM faceplate elements System Status LEDs Config DIP switches R2MFC MBM back and underside elements BNC and RJ-48 connectorsRS232 port E1 Status LEDs MBM DIP switches Power connectors Overview NN40010-300 Chapter Preparing to install the R2MFC MBM Host system setup requirements Installation process mapPreparing to install the R2MFC MBM Host system setup requirements Config DIP switches R2MFC MBM setup requirements Customer supplied hardware requirements Overview of the R2MFC MBM installation Chapter Installing the R2MFC MBM Shutting down a BCM 4.0 system Installing the R2MFC MBMShutting down the system Shutting down the BCM 4.0 system hardware Shutting down a BCM 3.7 or lower system Installing an R2MFC MBM in the BCM platform base chassis Installing an R2MFC MBM Installing an R2MFC MBM in the expansion unit Installing the rubber boot in an R2MFC module Installing an R2MFC MBM in the BCM50 expansion unit R2MFC Transmit Co-axial cable connected to the MBM Removing an R2MFC MBM Reconnecting the equipment Removing an R2MFC MBM from the BCM platform base chassis How to remove a BCM200 R2MFC MBM Removing an R2MFC MBM from the expansion unit How to remove a BCM400 R2MFC MBM How to remove the expansion unit front bezel Wiring an R2MFC MBM Installing the R2MFC MBM Trunk wiring overview Connecting an R2MFC MBM to a service provider Installing the R2MFC MBM Configuring the R2MFC MBM Chapter Configuring the R2MFC MBM E1 framing MFCR2 side External Link configurable parametersPhysical line characteristics Register signaling Line signaling Option Parameters Meaning Default Minimum or fixed number length + timer parameters Setting Config DIP switches Configuring the MFCR2 external link Creating a customized country code Config DIP switch layout E1 framing default parameters PRI side Internal Link configurable parameters Signaling Configuring the PRI internal linkConfiguring the PRI internal link using Element Manager Layer 2 signaling parameters Parameter Setting Module configuration parameters BCM lines configuration for R2MFC MBM Configuring the PRI internal link using Unified Manager Module type BCM module configuration for R2MFC MBM Off Turning on second dial tone Turning on second dial tone using Element Manager Outgoing dialing configuration for second dial tone Turning on second dial tone using Unified Manager Configuring the R2MFC MBM Inter-working functionality Chapter R2MFC MBM maintenance Translation of Subscriber Status R2MFC MBM maintenanceClock synchronization Setting the R2MFC MBM to diagnostic mode Diagnostic toolsDiagnostic and loopback modes Mode Description Call Availability Alarms Measurements Alarms Incoming signal errors Alarms propagationGroup I Alarms propagation Sheet 1 Alarm Cause Group II alarms propagation R2MFC MBM maintenance Group I Alarms propagation Sheet 2Faceplate LEDs System status monitor LEDs Logs and traces Error messagesLED Name Yellow LED Red LED Replacing an R2MFC MBM Overview of module replacement process Upgrading firmware Connect using Hyper-terminal setup parameters Program responds starting rec 0. Hit any key to continue R2MFC MBM maintenance NN40010-300 Overview Chapter Command Line Interface CLIUsers and passwords Command Line Interface CLI Accessing the CLI LOad directory CLI commands CommandsINfo directory CLI commands LOad directory VIew directory VIew directory CLI commands CNtrl directory CNtrl directory CLI commands Sheet 1 NN40010-300 COnfig directory CLI commands Sheet 1 COnfig directoryCNtrl directory CLI commands Sheet 3 NN40010-300 ALarm directory CLI commands Sheet 1 ALarm directory NN40010-300 SWerr directory SWerr directory CLI commands MFC directory MFC directory CLI commands Sheet 1 MFC directory CLI commands Sheet 2 See Chapter , MFC Signal Definitions, on page 111 for MFC R2 directory R2 directory CLI commands Sheet 1 Command Line Interface CLI R2 directory CLI commands Sheet 2 PRI directory PRI directory CLI commands Command Line Interface CLI NN40010-300 Shows the Config DIP switch layout Appendix a Configuring DIP switch settings and definitions Second dial tone DIP switch settings Country selection DIP switch settings Mexico Config 1 R2 A/B signals Country code defaultsMexico Config Meaning Signal Interpretation of received MFC signalsInterpretation of transmitted MFC signals Sheet 1 Mexico Config Interpretation of received MFC signals Sheet 1 Mexico Config 2 R2 A/B signals Interpretation of transmitted MFC signals Brazil Config 1 R2 A/B signals Brazil Config Interpretation of received MFC signals Brazil Config Brazil Config 2 R2 A/B signals Argentina Config Argentina Config 1 R2 A/B Signals Interpretation of received MFC signals Chile Config 1 R2 A/B signals Chile Config Signal Block Panama Config Configuring DIP switch settings and definitions NN40010-300 Diagnostics and Loopback Dip Switch Settings Appendix B Diagnostic and loopback DIP switch settings Diagnostic and loopback DIP switch settings NN40010-300 MFC signal meaning Appendix C MFC Signal DefinitionsMFC signal definitions MFC Signal Definitions NN40010-300 Cable pinouts Appendix D CLI Cable Pinout CLI Cable Pinout NN40010-300