Manuals / Brands / Computer Equipment / Server / Nortel Networks / Computer Equipment / Server

Nortel Networks NN43001-314 Best Bandwidth codec selection algorithm

1 418

Download 418 pages, 9.61 Mb

Codec negotiation 61

This is the preferred method of operation.

•The calling user agent sends an SDP offer with its codec list in the

INVITE message with a "sendrecv" attribute. The called user agent

returns more than one codec in the SDP answer. In the case that many

codecs are included in the response, the calling user agent picks the

ﬁrst compatible codec from the called user agent’s list, and sends a new

SDP offer with a single codec to lock it in.

•If the SDP of the calling user agent is not present in the INVITE

message, then the called user agent sends its codec list in an SDP

offer in the 200 OK message, with the "sendrecv" attribute. The calling

user agent selects one codec and sends the selected codec in an SDP

answer inside the ACK message, with "sendrecv" attribute.

For more information onthis algor ithm, referto RFC 3264 AnOffer/Answer

Model with the Session Description Protocol (SDP).

Best Bandwidth codec selection algorithm

The "Best Bandwidth" codec selection algorithm solves the issues caused

by the H.323 Master/Slave algorithm. The "Best Bandwidth" algorithm

selects one common codec based on two codec lists. Every time the

selection is done with the same two lists,the selected codec is the same.

The "Best Bandwidth" codec decision is based on the codec type only,

it does not take into account the fact that some codecs, while generally

using less bandwidth, can consume more bandwidth than others at certain

payload sizes.

"Best Bandwidth" is also applicable to SIP.

Algorithm details The selected codec is the type considered as the

best bandwidth codec type. To know whether one codec type has better

bandwidth than another, see the rule as summarized in Table5 "Best

Bandwidth algorithm - codec type" (page 61).

Tabl e 5

Best Bandwidth algorithm - codec type

G.711 A law G.711 mu-law G.729 A G. 729 AB G. 723.1

G.711 A-law G.711 A-law G.711 mu-law G.729 A G. 729 AB G. 723.1

G.711 mu-law G.711 mu-law G.711 mu-law G.729 A G. 729 AB G. 723.1

G.729 A G.729 A G.729 A G.729 A G. 729AB G.729A

G. 729 AB G. 729 AB G. 729 AB G. 729 AB G. 729 AB G. 729 AB

G. 723.1 G.723.1 G. 723.1 G.729A G. 729 AB G.723.1

Nortel Communication Server 1000

Branch Ofﬁce Installation and Commissioning

NN43001-314 01.02 Standard

Release 5.0 20June 2007

Copyright© 2007, Nor tel Networks

.

Contents

Main Page Revision history Page Contents New in this release 17 How to get help 19 Overview 21 Bandwidth Management 55 Bandwidth Management Support for Network Wide Virtual Ofce 121 Alternative Call Routing for Network Bandwidth Management127 How the Branch Ofce feature works 159 Planning and management 179 Adding a Branch Ofce 191 Converting a Small System to a Branch Ofce 201 Upgrading to CS 1000 Release 5.0 207 Main ofce conguration 209 MG 1000B platform hardware installation 221 MG 1000B software installation 239 Branch Ofce conguration 255 MG 1000B telephones 263 Dialing plan conguration 291 Emergency Services conguration 315 Basic Emergency Services When VO Logged Out 329 Abbreviated Dialing conguration 337 Maintenance and diagnostics 345 Appendix A Preprogrammed data 361 Appendix B Branch Ofce engineering example 371 Appendix C On-net dialing plan conguration examples 383 Appendix D Off-net dialing plan conguration example 405 List of terms 411 Procedures Page Page New in this release MG 1000B hardware platform Media Card MC32S Main and Branch Ofce running different releases Main Ofce and Branch Ofce Migration How to get help Getting help from the Nortel web site Getting help over the telephone from a Nortel Solutions Center Getting help from a specialist by using an Express Routing Code Getting help through a Nortel distributor or re-seller Overview What is Branch Ofce? Page Main Ofce and Branch Ofce Migration MG 1000B (MGC) compared to the MG 1000B (SSC) Page MGC Serial Ports Single CPU Implications Dual CPU Implications Terminal Server Support MGC serial port default conguration MGC serial ports conguration change in Overly 17 CEMux Support Clock References Main ofce hardware description MG 1000B platform hardware description Page MG 1000B Core MG 1000B Chassis Card slots MG 1000B Expander Signaling Server Network Routing Service (NRS) Telephones Firmware download Voice GatewayMedia Card Analog or digital trunk cards Analog or digital line cards Lineside cards MG 1000B with MGC Data Networking Page MGC Network Connections Page Page Page MG 1000B platform conguration overview MG 1000B platform without an MG 1000B Expander MG 1000B platform with an MG 1000B Expander Capacity Media Card DSP capacity Software requirements Main and Branch Ofce running the same release Main and Branch Ofce running different releases Features in mixed-software congurations Adding a Branch Ofce to an existing network IP Phone rmware Package Combinations Supported applications Survivability Page Active Call Failover ACF mode Conguring S2 IP Address to point to the main ofce TPS Page Bandwidth Management Introduction voice quality can be managed between multiple Call Servers. Codec negotiation SIP example G.711 A-law and mu-law interworking Bandwidth management and codecs Codec selection Codec selection algorithms H.323 Master/Slave algorithm SIP Offer/Answer model Best Bandwidth codec selection algorithm Conguring Bandwidth Management parameters Zones Conguration rules Network Planning Enabling codecs Conguring Bandwidth Management Conguration using CS 1000 Element Manager Conguration using LD 117 Maintenance commands Maintenance using Element Manager Page Maintenance using LD 117 Adaptive Network Bandwidth Management Description Page Call scenario Zone bandwidth management and Adaptive Network Bandwidth Management Page Adaptive Network Bandwidth Management conguration parameters Limitations Feature packaging Conguration rules Conguring Adaptive Network Bandwidth Management Advanced Conguration Notes Conguration using Element Manager Page Conguration using Command Line Interface Youcan also congure the Adaptive Network Bandwidth Management feature using LD 117. Page Page Page Maintenance commands Maintenance using Element Manager Page Maintenance using LD 117 The same information can be displayed using commands in LD 117. Page Page Page Tandem Bandwidth Management overview Application Dialing Plan Overview Page Network using Uniform Dialing Plan Common details Differences when every Branch Ofce HLOC is shared with the main ofce when the Branch Ofce HLOC is shared with the main ofce. Call between two branch ofces associated with the same main ofce Every Branch Ofce HLOC is shared with the main ofce No Branch Ofce HLOC is shared with the main ofce, but can be shared with another Branch Ofce No Branch Ofce HLOC is shared with the main ofce or another Call between branch ofces associated with different main ofce Every Branch Ofce HLOC is shared with the main ofce No Branch Ofce HLOC is shared with the main ofce, but can be shared with another Branch Ofce Page No Branch Ofce HLOC is shared with the main ofce or another Page Summary of provisioning procedures for Tandem Bandwidth Management Provisioning Example of TandemBandwidth Management Page Page Page Page 9Provision the Branch Ofce with a terminating RLI with a DMI to delete the LOC prexes. Network using mixed Coordinated Dialing Plan and Uniform Dialing Plan Call between two local branch ofces Abnormal case - calls originating using UDP,but terminating using CDP Call between branch ofces associated with different main ofces Page Network using CDP only Page Call between two local branch ofces Call between branch ofces associated with different main ofces Page Page Bandwidth Management Support for Network Wide Virtual Ofce Feature description Operating parameters Assumptions Feature interactions Interaction with Zone-based Digit Manipulation Interaction with Time and Date Feature packaging Feature implementation Task summary list Page Feature operation No specic operating procedures are required to use this feature. Page Alternative Call Routing for Network Bandwidth Management Description Page ALTPrex How Alternative Call Routing for NBWM works Call from Branch Ofce telephone in Normal Mode Call from main ofce telephone to Branch Ofce telephone Dialing plans Examples of Alternative Call Routing for NBWM in operation A call from a Branch Ofce telephone to a main ofce telephone Page Page A call from a main ofce telephone to a Branch Ofce telephone Page Page A call from a Branch Ofce telephone to another Branch Ofce telephone Page Page Page Alternative Call Routing for NBWM feature used in All Calls mode Operating parameters Feature interactions Call Redirections Multiple Appearance Directory Number Network Bandwidth Management Network Class of Service Feature packaging Feature implementation using Command Line Interface Task summary list Sample printout Feature implementation using Element Manager Zone conguration Accessing the Zones web page Page Diagnostics Command Line Interface diagnostics Element Manager diagnostics Print zone Alternative Call Routing information Page Page Show the status of the AlternativeCall Routing for NBWM feature Page Maintenance Command Line Interface maintenance Sample printout: Where # is the column header for zone number. Element Manager maintenance Enable a zones Branch Ofce behavior Page Suppress alarms Feature operation How the Branch Ofce feature works Introduction Normal Mode and Local Mode operation Normal Mode Local Mode Page Features supported in Local Mode Licensing Testing the telephone in Local Mode Virtual Trunks IP Phone calls Zones Vacant Number Routing Time of Day MG 1000B IP Phone to local PSTN calls IP Phone to analog (500/2500-type) or digital telephone calls Incoming calls from the local PSTN Conference calls Group Call Local Mode operation Survivability of IP Phones Conguring non-zero S2 IP Addresses Points to remember Conguring the S2 IP Address parameter Multiple Appearance DN (MADN) IP Phones with the same DN at the Branch Ofce IP Phones with the same DN at the main ofce Emergency services Conguring ESA for emergency services Conguring SPN for emergency services Abbreviated Dialing Page MG 1000B Core interoperability Network Wide Redundancy Phase II and Network Music Page Page Planning and management Data network planning LAN/WAN bandwidth requirements Branch Ofce dialing plan Emergency Services Zones Music on Hold ESN Access Codes Provisioning the IP Phones Conguration example for PSTN resources at the Branch Ofce Zone conguration description Management Remote Access Element Manager Telephony Manger 3.1 Set-Based Installation for IP Phones Automatic Set Removal Trafc measurement Call Detail Recording (CDR) Proactive VoiceQuality management System security Unauthorized access Page Adding a Branch Ofce Introduction Main ofce requirements Optional features Branch Ofce requirements Implementation summary Page Adding a CS 1000 Release 5.0 Branch Ofce to a Branch Ofce with a previous software release Upgrade the entire network to CS 1000 Release 5.0 Upgrade only the main ofce to CS 1000 Release 5.0 Upgrade main ofce with IP Phone rmware upgrade Upgrade main ofce without IP Phone rmware upgrade Page Converting a Small System to a Branch Ofce Introduction Requirements Conversion Implementation summary Page Page Page Upgrading to CS 1000 Release 5.0 Introduction Upgrading to CS 1000 Release 5.0 Main ofce conguration Introduction Zone parameters Page Page 4Enable the features forthe Branch Ofce zone in LD 117. Element Manager zone conguration Use Element Manager to congure the Branch Ofce specic zone properties and time difference. Page IP Phone passwords and parameters Page Page MG 1000B IP Phone conguration MG 1000B IP Phone conguration using TM 3.01 MG 1000B IP Phone conguration using LD 11 Page Page MG 1000B platform hardware installation Installing an MG 1000B Core Readiness checklist Tools checklist Rack-mounting an MG 1000B Core or MG 1000B Expander Items required Page Page Page Installing cards Installing a Signaling Server Materials required Page Preparing for rack-mounting Page Rack-mounting DANGER Page Page Connecting and powering up the Signaling Server Page Page Page MG 1000B software installation Signaling Server software installation Materials required Creating the Signaling Server CD Installing the Signaling Server software Upgrading the SIgnaling Server software Signaling Server tools Page Signaling Server port speed Verifying a successful conguration Connecting the MG 1000B Core to the network Connecting the MG 1000B Core to the network Page Page Using Element Manager to congure the node Page Installing MG 1000B Hardware Installing the cards Removing the SSC card Installing a DSP Daughterboard Installing the MGC card Installing the CP PM card Page Page Branch Ofce conguration Conguring the Branch Ofce Summary of steps Conguring the Media Cards Conguring the trunks and lines Zone parameters 1Set the current date and time. See Software Input Output Administration (NN43001-611). 2Congure the Home Location Code (HLOC) and Virtual Private Network Identier (VPNI). Page IMPORTANT! Element Manager Branch Ofce zone conguration Adding the Branch Ofce endpoints to the NRS database Page Page MG 1000B telephones Overview Installing and conguring IP Phones Password requirements Installing an IP Phone using the keypad Page Page Page Page Branch User Cong Page Page Page Transferring IP Phone data using TM 3.01 Using the Reports and Import Facility in TM Page Survivability test Page Page Installing IP Phones through LD 11 Page Using the IP Phones Changing the SCPW Telephone Options Page Virtual Ofce Login on the Branch Ofce Feature interactions between Branch User and Virtual Ofce logins Test Local Mode Personal Directory,Callers List, Redial List Set-Based Removal Analog and digital devices in the Branch Ofce Analog devices Digital devices Activating analog (500/2500-type) and digital telephones Page Dialing plan conguration Overview Introduction Dialing plans On-net dialing plan options Off-net dialing plan Routing Branch User call to an MG 1000B PSTN Routing incoming calls from an MG 1000B PSTN to an MG 1000B telephone (DID call) SIP/H.323 zones Bandwidth management zones Zone-based digit manipulation CLID composition CLID verication Conguring the dialing plan for PSTN access to Branch Users in Normal Mode Preparing to congure the dialing plan Conguring the dialing plan Page Page Page a. Congure the DMI in LD 86 with the DGT feature. b. Congure the RLI in LD 86 with the RLB feature. For example, assume that the Virtual Trunkis on route 10, and the Customer number is 0: 4Congure ESN Special Number and Digit Manipulation. Page Page Page Page Page b. Congurethe RLI in LD 86 with the RLB feature. For example,assume that the PSTN trunk is on route 18 and the Customer number = 0. 2Congure ESN Special Number and Digit Manipulation. Dialing plan conguration using Element Manager Testing PSTN access using an MG 1000B IP Phone Page Page Emergency Services conguration Overview Emergency Services Access (ESA) Routing ESA calls Emergency call routing PSTN routing: Enhanced 911 versus Basic 911 Conguring ESA for the Branch Ofce Reregistering to minimally congured branch Determining the dialing plan for ESA calls Page Page Page 2. Congure the Route List Indexin LD 86 with the RLB feature. 3. Congure the ESN Special Number and Digit Manipulation in LD 90. Page Page Conguring the NRS Testing the number Element Manager ESA conguration Emergency Service using Special Numbers (SPN) CLID verication (CLIDVER) Networked M911 Basic Emergency Services When VO Logged Out Contents Overview Making an ESA Call From a Logged Out Phone Receiving ESA Callback ESA Call Processing CLID Composition ESA VO Logout Timer Provisioning, Administration and Maintenance Keeping Logged Out State Congure ESA Data Block Sysload Warm Start Emergency Services For Client Mobility Active Call Fail Over Context Sensitive Soft Keys Element Manager Page Abbreviated Dialing conguration Overview Recommended conguration Conguring Abbreviated Dialing 1In LD 18, congure the SCL for each main ofce zone. 2Repeat Step 1 to congure the SCL for each Branch Ofce zone. 3In LD 18, congure the default SCL. Page Page 1In LD 15, congure Flexible Code Restriction for IDC. 2In LD 49, congure IDC. 3In LD 49, congure Flexible Code Restriction to allow all codes. 4In LD 16, congure the Route Data Block to enableIDC on this route. Page Maintenance and diagnostics Firmware downloads Enhanced UNIStim Firmware Download for IP Phones Page Page Page Troubleshooting Page Page Page Page Signaling Server CLI commands isetShow clearLockout TN or IP Call Server commands Verify CLID Print Branch Ofce zone information Enable/disable Branch Ofce zone features View status of Branch Ofce zone at main ofce Call Server Change/print PVQ notication levels Print PVQ statistics Print inventory Print MG 1000B software and system information Page Appendix A Preprogrammed data Introduction Passwords and codes Default numbering plan First digits Important extension numbers Flexible Feature Codes SDI ports Modem port ESDI settings Table35 "ESDI settings" (page 365) lists the preset ESDI settings. Telephone tones Trunk routes System parameters Customer data Trunk models supervision = YES. Page Telephone models Appendix B Branch Ofce engineering example Introduction Assumptions Equipment characteristics Trafc characteristics Required calculations Calculations Trafc Page MG 1000B Core and MG 1000B Expander requirements Page Bandwidth requirements Incremental bandwidth required on the TLAN subnet to carry given voice trafc: Page Branch Ofce conference engineering With no local conference With local conference Integrated Conference Bridge card Page Page Appendix C On-net dialing plan conguration examples Introduction Coordinated Dialing Plan Page Page Page Uniform Dialing Plan From main ofce to Branch Ofce From Branch Ofce to main ofce When the Branch User telephone is in Local Mode Page NRS conguration Page 6Congure Branch User. 7Congure Virtual Trunk Route Group Dialing Plan From main ofce to Branch Ofce using CDP From main ofce to Branch Ofce using UDP-LOC From Branch Ofce to main ofce using CDP From Branch Ofce to main ofce using UDP-LOC Branch User telephone (DN 3002) is in Local Mode 4Congure CDP Distant Steering Code (DSC). 5Congure UDP LOC. 6Congure UDP HLOC. 7Congure HLOC in CDP. NRS conguration Tocongure GDP at the Branch Ofce, do the following: 1Congure ESN Control Block for CDP and AC1. 2Congure Digit Manipulation. 3Congure UDP LOC. 4Congure UDP LOC. Transferable DN Overview Page Page Call Scenario Conguration for TNDN Page Page Appendix D Off-net dialing plan conguration example Introduction Call scenario Provisioning At the main ofce Call Server, the followingis provisioned: AC1 = 1, and AC2 = 2 For Zone 1, ZACB = ALL, and ZDP = 101 DMI = 10, with DEL = 0 and CTYP = INTL RLI = 1, with DMI = 10 and ROUT = 18, where this is the route number for the Virtual Trunk SPN = 101, with CLTP= INTL and RLI = 1 NRS RLI = 4, with DMI = 12 and ROUT = 11, where this is the route number for the PSTN Trunk SPN = 101, with CLTP= INTL and RLI = 4 Call example Mode and dials "1 87654321", using the conguration provisioned in the previous section. NRS List of terms CDP datadump DSP ELAN subnet IP ITG-P LAN Layer 2 switching Layer 3 switching NAT NCS NRS PSTN QoS routing SIP TDM TLAN subnet TPS WAN Page Page Nortel Communication Server 1000 Branch Ofce Installation and Commissioning