Nortel Networks SRG50 manual Network Bandwidth Management Nbwm, Alternative Call Routing ACR

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Chapter 4 CS 1000 considerations 39

Network Bandwidth Management (NBWM)

The SRG interoperates with the Network Bandwidth Management (NBWM) feature in a manner similar to Media Gateway (MG) 1000B, though only G.711 and G.729 codecs are supported. At the SRG, a Virtual Private Network ID (VPNI) and Zone ID are entered with values defined by the main office configuration (see Bandwidth management configuration: NBWM, ADBWM, and ACR on page 40). The VPNI and Zone ID allow the CS 1000 to recognize that H.323 and SIP calls to and from the SRG are from a specific Bandwidth Management zone.

NBWM allows bandwidth zones to be configured on a network basis so that codec selection and bandwidth allocation software can identify whether IP telephones or gateways are physically collocated (in the same bandwidth zone) even though they are controlled by different call servers. NBWM is used to define the codec selection policy and track bandwidth used for calls that traverse the WAN (interzone calls) and the LAN (intrazone calls). The bulk of configuration for NBWM is done at the main office.

Adaptive Network Bandwidth Management (ADBWM)

As with NBWM, only the VPNI and Zone ID are required at the SRG in order to implement he Adaptive Network Bandwidth Management (ADBWM) feature on the SRG (see Bandwidth management configuration: NBWM, ADBWM, and ACR on page 40).

ADBWM uses real-time interaction to enhance the performance of Voice over Internet Protocol (VoIP) networks. ADBWM adjusts bandwidth limits and takes corrective action in response to Quality of Service (QoS) feedback. This adjustment occurs dynamically, while calls are in progress. A call server with ADBWM uses VPNIs and Zone IDs to keep track of the bandwidth being used between its own zone and zones belonging to other call servers. If the interzone QoS degrades below an acceptable level, the available bandwidth is reduced automatically between the two zones. When the QoS between the two zones improves, the bandwidth limit is allowed to return to normal.

Alternative Call Routing (ACR)

Configuration for Alternative Call Routing (ACR) at the SRG includes datafilling the Virtual Private Network ID (VPNI) and Zone ID required by NBWM and ADBWM. However, additional configuration is required and depends on the type of trunking provisioned at the main office: Attendant service or DID trunks (see Bandwidth management configuration: NBWM, ADBWM, and ACR on page 40).

ACR for NBWM allows a station-to-station call (that is, a call that does not use a trunk) to overflow to traditional routes. Overflow can occur if there is insufficient interzone bandwidth available to carry the call, or if the QoS has degraded to unacceptable levels. The feature applies to station-to-station calls between a branch office and main office as well as from one branch office to another branch office, provided both stations are registered to the same main office.

Network administrators who do not want calls to be blocked, yet have a limited amount of bandwidth available, can use ACR to overflow calls to conventional trunks (PSTN or Tie/MCDN). ACR allows calls to be routed by overflowing them, trading off the capital cost of WAN bandwidth against the incremental cost of overflowed calls.

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 400BCM50 default IP addresses SRG50 creationPort IP address Subnet mask 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 devicesSRG50 terminology SRG50 terminology Sheet 1Term Description 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 LinesCall routing configuration Redirection and call forward configurationConfiguration Telephony Dialing Plan Routing 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 modeVirtual trunk capacity Vacant Number Routing VNRBandwidth management Network Bandwidth Management Nbwm Adaptive Network Bandwidth Management AdbwmAlternative 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 panel S1000 Main Office Settings Sheet 1CS 1000 information for the SRG 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 telephones redirection IP telephones numbers and modelsIP telephone numbers and models Sheet 1 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 FirmwareIP telephone settings Configuration settings for redirected IP PhonesParameter Setting Supported IP clients and firmware versions Firmware upgradeFirmware upgrade procedure Supported firmwareCS 1000 considerations NN40140-500 IP telephones setup and configuration Registration passwordTo set the IP telephone registration password Password registration parameters IP telephones setup and configurationLocal mode indication IP telephone codec and jitter settingsTo 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 configurationDhcp settings configuration To configure Dhcp settings for SRG operationCall forwarding options 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 networkBasic parameters Basic parameters Sheet 1Parameter Value Context Private dialing plan Setting up the private VoIP network Basic parameters Sheet 2Meridian Customer Defined Network Mcdn To enable Mcdn TATQoS settings codec, jitter buffer, and related items Main office QoS settings Sheet 1Media parameter Settings SIP settings 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 SRG Pstn access Remote Access Package for VoIP trunksTo configure remote access packages To configure destination codes for the Pstn Pstn destination codes configurationExternal attendant support Main office informationPstn access and analog devices Pstn access considerationsAnalog devices considerations To configure the DNs for analog devices Access to system featuresPstn access and analog devices 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 1Troubleshooting Probable causes for redirection failureIP Terminal Details Sheet 2 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 Telephone features in normal and local mode Normal modeLocal mode Telephone features in normal and local mode IP Phone 1110 in Local modeIP Phone 1120E in Local mode IP Phone 1140E 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 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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