Nortel Networks SRG50 manual Recovery to normal mode, Testing the telephone in local mode

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Chapter 4 CS 1000 considerations 37

If the main office Signaling Server fails and an Alternate Signaling Server is available, the SRG IP Phones reset and reregister with the SRG. The SRG will then query the NCS for the Alternate Signaling Server’s IP address. The SRG will redirect the IP Phone to the Alternate Signaling Server and continue to receive call processing services from the main office Call Server. If no Alternate Signaling Server is available, the SRG IP Phones reset and register with the SRG in local mode.

When an IP Phone at the SRG first boots up, the IP Phone attempts to communicate with the SRG. After communication with the SRG is established, the SRG redirects the IP Phone to the main office. When the SRG IP Phone attempts to register with the main office, the SRG first queries the Primary NRS for the main office Virtual Trunk node IP address to redirect the IP Phone. If the Primary NRS is down or unreachable, the SRG queries the Alternate NRS, if one is specified. If it receives a positive response, the SRG IP Phone is redirected to the specified main office. Otherwise, if neither a Primary or an Alternate NRS is available, the SRG IP Phone remains in local mode, and receives call processing services from the SRG until communication can be reestablished.

SRG IP Phones in normal mode remain registered with the main office if the Primary NRS fails and no Alternate NRS is available. They can call any main office telephone or IP Phones in normal mode in other branch offices.

SIP/ H323 trunks are used for Voice traffic alone. Proprietary TPSAR protocol is used for WAN link health check and for Main Office TPS address discovery through NRS.

However, they cannot call any SRG analog (500/2500-type) telephones or any external numbers through the SRG trunks because the Virtual Trunks are not available. (SRG analog [500/ 2500-type] telephones are accessible if alternate routing is available through the PSTN.)

For more information about virtual trunks for SRG50, see the Main Office Configuration for Survivable Remote Gateway 50 (NN43001-307).

Recovery to normal mode

Once communication is re-established with the main office call server, all IP Phones at the branch office that are in local mode automatically redirect and reregister to the main office and return to normal mode operation. IP Phones that were busy at the time communication was reestablished complete the call in local mode, and then reregister with the main office after the call is complete.

Testing the telephone in local mode

From normal mode, the branch user has the option of going to local mode manually using the Test local mode feature. The test can be performed by the user at any time and does not require a password. This test is invoked from any IP Phone at the branch office.

Nortel recommends testing local mode operation after changing the provisioning for a telephone on the SRG.

To ensure that users do not forget to resume normal mode operation, the SRG redirects the telephone to the main office to return the telephone to normal mode. This occurs if the telephone remains registered to the SRG in test local mode for ten minutes (default setting). Alternatively, the user can press the Quit key from the set to return to normal mode.

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 About this guide Getting startedAudience AcronymsGetting started Acronyms used in this guide Sheet 2 Command line prompts on display telephones Symbols and conventions used in this guideGetting started Convention Example Used for Word in a special font shownConvention 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 400SRG50 creation BCM50 default IP addressesPort IP address Subnet mask SRG50 keycode activation BCM50 default user names and passwordsTo activate the SRG keycode Click Load FileTo reboot the system SRG50 and BCM50 features comparisonClick Reboot BCM50 System To verify that the SRG has been successfully createdSRG50 overview Comparison of BCM50 and SRG50 Sheet 2 Supported devicesSRG50 terminology Sheet 1 SRG50 terminologyTerm Description Coordination with the main office call server Normal modeSRG operating modes SRG50 overview SRG50 terminology Sheet 2Normal 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 System IP Subsystem Foundation configurationConfiguration Resources Application Resources Configuration Telephony Global SettingsTask summary IP telephone configurationVoIP trunk configuration Dialing plan configurationConfiguration Telephony Sets All DNs Configuration Telephony Lines Target LinesConfiguration Telephony Lines Active Physical Lines Configuration Telephony Lines Active VoIP LinesRedirection and call forward configuration Call routing configurationConfiguration Telephony Dialing Plan Routing Task summary NN40140-500 CS 1000 and SRG terminology comparison CS 1000 considerationsCS 1000 considerations Comparison of CS 1000 and SRG terms and contexts Sheet 1AC1 Normal and local mode overview Survivability Testing the telephone in local mode Recovery to normal modeVacant Number Routing VNR Virtual trunk capacityBandwidth management Adaptive Network Bandwidth Management Adbwm Network Bandwidth Management NbwmAlternative Call Routing ACR 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 AccessS1000 Main Office Settings Sheet 1 S1000 Main Office Settings panelCS 1000 information for the SRG S1000 Main Office Settings Sheet 2 CS 1000 considerations S1000 Main Office Settings Sheet 3 To datafill the S1000 Main Office Settings panelMO Access Code Length Field Values Description Node IDIP telephones numbers and models IP telephones redirectionIP telephone numbers and models Sheet 1 SRG S1000 IP Terminal Details fields Sheet 1 S1000 IP Terminal Details panelField Values Description HardwareTo redirect the telephone to the main office call server To enter the Motn and BuidField Values Description Firmware VersionConfiguration settings for redirected IP Phones IP telephone settingsParameter Setting Firmware upgrade procedure Firmware upgradeSupported firmware Supported IP clients and firmware versionsCS 1000 considerations NN40140-500 Registration password IP telephones setup and configurationTo set the IP telephone registration password Password registration parameters IP telephones setup and configurationIP telephone codec and jitter settings Local mode indicationTo change local mode indication 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 configurationTo configure Dhcp settings for SRG operation Dhcp settings configurationCall forwarding options Test Local Mode Configuration settings for redirected phonesTo activate Test Local Mode Configuration settings for redirected IP telephonesTo exit Test Local Mode and return to Normal Mode Features in local modeReceiver volume Delayed ring transferAlarm set Emergency Services SupportHeld line reminder Language and ContrastIP 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 networkBasic parameters Sheet 1 Basic parametersParameter Value Context Private dialing plan Setting up the private VoIP network Basic parameters Sheet 2Meridian Customer Defined Network Mcdn To enable Mcdn TATMain office QoS settings Sheet 1 QoS settings codec, jitter buffer, and related itemsMedia parameter Settings SIP settings Modules panel, IP Trunks SRG50 Configuration Guide To enter the QoS settings for VoIP trunksFallback configuration VoIP trunking configurationTo enable fallback Network securityGatekeeper routing To configure gatekeeper settings for H323 trunksTo configure routing for outgoing calls Outgoing calls configurationLine pools Call routingSelect the Destination Codes tab Remote Access Package for VoIP trunks SRG Pstn accessTo configure remote access packages To configure destination codes for the Pstn Pstn destination codes configurationExternal attendant support Main office informationPstn access considerations Pstn access and analog devicesAnalog devices considerations Access to system features To configure the DNs for analog devicesPstn access and analog devices Select the Capabilities and Preferences tab Pstn access and analog devices NN40140-500 IP telephone troubleshooting TroubleshootingIP telephone troubleshooting Sheet 1 Issue / Problem Probable Cause / SolutionIP terminal details Troubleshooting IP telephone troubleshooting Sheet 2IP Terminal Details Sheet 1 Call Server Details Event Id Severity Type CommentsProbable causes for redirection failure TroubleshootingIP Terminal Details Sheet 2 IP telephones manual redirection Troubleshooting fallback to local modeTo manually redirect an IP telephone to the main office IP telephone firmware discrepanciesCannot clear alarms using an alarm set Troubleshooting NN40140-500 Normal mode Telephone features in normal and local modeLocal mode Telephone features in normal and local mode IP Phone 1110 in Local modeIP Phone 1140E in Local mode IP Phone 1120E in Local modeIntercom/Line 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 IP 2050 Softphone in Local Mode ATA extension featuresFeature Activate Cancel Link key sequences Sheet 1Link *3 Glossary Gatekeeper Gateway H.323 IP telephones Local modeBranch office Call routing Dialing planGlossary Normal mode QoSMain office, main office call server Steering codesIndex 100 101 102
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