Nortel Networks SRG50 manual Normal and local mode overview, Normal mode

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Chapter 4 CS 1000 considerations 35

Normal and local mode overview

Normal mode and local mode overview provides a description of the following sections:

•“Normal mode” on page 35

•“Local mode” on page 35

•“Survivability” on page 36

•“Recovery to normal mode” on page 37

•“Testing the telephone in local mode” on page 37

Normal mode

IP Phones that are physically located at the SRG but are registered with the main office are operating in normal mode. In normal mode, the main office provides centralized call processing to all applications transparently to all IP Phones at the Branch Office.

Users of the SRG IP Phones receive the features, applications, key layout, and tones of the main office Call Server. This provides feature and application transparency between the branch office and the main office.

Local mode

Users at the branch office may be in local mode, or survivable mode for two different reasons:

1IP Phone may have just booted up.

2IP Phone cannot communicate to the main office because of a WAN failure or a failure of the main office components.

Note: When a telephone or trunk in the main office calls an SRG IP Phone that has switched to local mode due to WAN failure, the call is treated according to the main office call redirection configuration (such as forwarding to voice mail or continuous ringback).

In the event that the IP Phones at the branch office lose the connection to the main office CS1000 call server for any reason (WAN failure, main office call server failure, main office Signaling Server failure), the SRG50 reverts to local mode automatically. Essentially, when VoIP connectivity is lost, each IP Phone loses its Reliable UDP (RUDP) connection with the main office terminal proxy server (TPS). The IP Phones at the branch office reboot and re-register to the SRG50, placing them in local mode.

Once this has occurred, the IP Phones displays an indication on the display area that the set is in local mode of operation. This display is configurable by installers to meet local language and usage norms.

In local mode, the IP users connected at the branch office are under the control of the SRG50 call services. As such, the normal main office call server features are not available. The SRG50 offers a basic feature set when in local mode which allows IP Phones to continue to make and receive calls internally within the branch office and over the provisioned local PSTN interfaces. Basic

SRG50 Configuration Guide

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Contents SRG50 Configuration Guide Copyright 2006-2008 Nortel Networks, All Rights Reserved Task List SRG50 Configuration GuideNN40140-500 Contents Fallback configuration Gatekeeper routing Glossary NN40140-500 Acronyms Getting startedAbout this guide AudienceGetting started Acronyms used in this guide Sheet 2 Convention Example Used for Word in a special font shown Symbols and conventions used in this guideCommand line prompts on display telephones Getting startedConvention Example Used for Related publicationsGetting Help from the Nortel Web site How to get helpGetting started NN40140-500 SRG50 overview Features SRG 1.5 on BCM SRG50 400Port IP address Subnet mask BCM50 default IP addressesSRG50 creation Click Load File BCM50 default user names and passwordsSRG50 keycode activation To activate the SRG keycodeTo verify that the SRG has been successfully created SRG50 and BCM50 features comparisonTo reboot the system Click Reboot BCM50 SystemSRG50 overview Comparison of BCM50 and SRG50 Sheet 2 Supported devicesTerm Description SRG50 terminologySRG50 terminology Sheet 1 SRG50 overview SRG50 terminology Sheet 2 Normal modeCoordination with the main office call server SRG operating modesNormal mode Local mode Local modeAutomatic registration with the main office SRG installation and configuration summarySRG50 overview Process map for installing and configuring an SRG Configuration Telephony Global Settings Foundation configurationConfiguration System IP Subsystem Configuration Resources Application ResourcesTask summary IP telephone configurationConfiguration Telephony Lines Target Lines Dialing plan configurationVoIP trunk configuration Configuration Telephony Sets All DNsConfiguration Telephony Lines Active Physical Lines Configuration Telephony Lines Active VoIP LinesConfiguration Telephony Dialing Plan Routing Call routing configurationRedirection and call forward configuration Task summary NN40140-500 Comparison of CS 1000 and SRG terms and contexts Sheet 1 CS 1000 considerationsCS 1000 and SRG terminology comparison CS 1000 considerationsAC1 Normal and local mode overview Survivability Testing the telephone in local mode Recovery to normal modeBandwidth management Virtual trunk capacityVacant Number Routing VNR Alternative Call Routing ACR Network Bandwidth Management NbwmAdaptive Network Bandwidth Management Adbwm To configure SRG for Nbwm and Adbwm Bandwidth management configuration NBWM, ADBWM,Ensure that the DN Type is Public Unknown To configure Alternative Call Routing with did trunksEmergency Services Access ESA configuration To configure on-site notification To configure Emergency Services AccessCS 1000 information for the SRG S1000 Main Office Settings panelS1000 Main Office Settings Sheet 1 S1000 Main Office Settings Sheet 2 Field Values Description Node ID To datafill the S1000 Main Office Settings panelCS 1000 considerations S1000 Main Office Settings Sheet 3 MO Access Code LengthIP telephone numbers and models Sheet 1 IP telephones redirectionIP telephones numbers and models Hardware S1000 IP Terminal Details panelSRG S1000 IP Terminal Details fields Sheet 1 Field Values DescriptionVersion To enter the Motn and BuidTo redirect the telephone to the main office call server Field Values Description FirmwareParameter Setting IP telephone settingsConfiguration settings for redirected IP Phones Supported IP clients and firmware versions Firmware upgradeFirmware upgrade procedure Supported firmwareCS 1000 considerations NN40140-500 To set the IP telephone registration password IP telephones setup and configurationRegistration password Password registration parameters IP telephones setup and configurationTo change local mode indication Local mode indicationIP telephone codec and jitter settings To configure DN records for redirected IP telephones Telephone DN records configurationIP telephones setup and configuration Model Button Select the Capabilities and Preferences tabTo map received numbers to the DN Received numbers configurationCall forwarding options Dhcp settings configurationTo configure Dhcp settings for SRG operation Configuration settings for redirected IP telephones Configuration settings for redirected phonesTest Local Mode To activate Test Local ModeDelayed ring transfer Features in local modeTo exit Test Local Mode and return to Normal Mode Receiver volumeLanguage and Contrast Emergency Services SupportAlarm set Held line reminderIP telephones setup and configuration NN40140-500 IP networking, SRG to WAN, main office to WAN Setting up the private VoIP networkVoIP trunks Setting up the private VoIP networkParameter Value Context Basic parametersBasic parameters Sheet 1 Private dialing plan Setting up the private VoIP network Basic parameters Sheet 2Meridian Customer Defined Network Mcdn To enable Mcdn TATMedia parameter Settings SIP settings QoS settings codec, jitter buffer, and related itemsMain office QoS settings Sheet 1 Modules panel, IP Trunks SRG50 Configuration Guide To enter the QoS settings for VoIP trunksNetwork security VoIP trunking configurationFallback configuration To enable fallbackGatekeeper routing To configure gatekeeper settings for H323 trunksCall routing Outgoing calls configurationTo configure routing for outgoing calls Line poolsSelect the Destination Codes tab To configure remote access packages SRG Pstn accessRemote Access Package for VoIP trunks To configure destination codes for the Pstn Pstn destination codes configurationExternal attendant support Main office informationAnalog devices considerations Pstn access and analog devicesPstn access considerations Pstn access and analog devices To configure the DNs for analog devicesAccess to system features Select the Capabilities and Preferences tab Pstn access and analog devices NN40140-500 Issue / Problem Probable Cause / Solution TroubleshootingIP telephone troubleshooting IP telephone troubleshooting Sheet 1Call Server Details Event Id Severity Type Comments Troubleshooting IP telephone troubleshooting Sheet 2IP terminal details IP Terminal Details Sheet 1IP Terminal Details Sheet 2 TroubleshootingProbable causes for redirection failure IP telephone firmware discrepancies Troubleshooting fallback to local modeIP telephones manual redirection To manually redirect an IP telephone to the main officeCannot clear alarms using an alarm set Troubleshooting NN40140-500 Local mode Telephone features in normal and local modeNormal mode Telephone features in normal and local mode IP Phone 1110 in Local modeIntercom/Line IP Phone 1120E in Local modeIP Phone 1140E in Local mode IP Phone 2002 in Local mode IP Phone 2001 in Local modeIP Phone 2007 in Local mode IP Phone 2004 in Local modeIP Phone 2033 in Local mode Link key sequences Sheet 1 ATA extension featuresIP 2050 Softphone in Local Mode Feature Activate CancelLink *3 Dialing plan Gatekeeper Gateway H.323 IP telephones Local modeGlossary Branch office Call routingSteering codes Normal mode QoSGlossary Main office, main office call serverIndex 100 101 102
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