Nortel Networks NN43001-307 - page 96

96 Bandwidth Management

IP Peer Networking supports the per-call selection of codec standards,

based on the type of call (interzone or intrazone). IP PeerNetworking

supports the following codecs (with supported payload sizes in parentheses,

with the default value in bold):

•G.711 A/mu-law (10 ms, 20 ms, and 30 ms)

•G.729 A (10 ms, 20 ms, 30 ms, 40 ms, and 50 ms)

•G.729 AB (10 ms, 20 ms, 30 ms, 40 ms, and 50 ms)

•G.723.1 (30 ms) (though it can limit the number of DSP channels

available)

SRG 50 does not support G.723 codec.

•T.38for fax

ATTENTION

The G.XXX series of codecs are standards deﬁned by the International

TelecommunicationsUnion (ITU).

By default, the G.711 codec must be supported at both ends of a call.

Codec conﬁguration is performed foreach node and is independent of the

signaling gateway that is used onthe node.

The payload size on the CS 1000 must be set to 30 msec in order to work

with the SRG.

IP Peer Networking performs codec negotiation by providing a list of codecs

that the devices can support. Use CS 1000 Element Manager to conﬁgure

the list of codec capabilities. See IP PeerNetworking Installation and

Commissioning (NN43001-313) for instructions on conﬁguring codecs.

The codec preference sequence sent over SIP/H.323 depends on the

bandwidth policy selected for the Virtual Trunk zone and the involved

telephones. For “Best Quality”, the list is sorted from best to worst voice

quality. For Best Bandwidth, the list is sorted from best to worst bandwidth

usage.

The G.711 codec delivers “toll quality” audio at 64 kbit/s. This codec is

optimal for speech quality,as it has the smallest delay and is resilient to

channel errors. However, the G.711 codec uses the largest bandwidth.

The G.729A codec provides near toll quality voice at a low delay. The

G.729A codec uses compression at 8 kbit/s. The G.729AB codec also

uses compression at 8 kbit/s.

The G.723.1 codec provides the greatest compression.

Nortel Communication Server 1000

Main Ofﬁce Conﬁguration Guide forSRG 50

NN43001-307 02.02 Standard

Release 5.0 3 December 2007

Copyright© 2005-2007, Nor tel Networks

.

Contents

Main Page Revision history Page Contents New in this release 9 Description 11 Setting up the main ofce 31 Dialing Plan conguration 43 Bandwidth Management 95 Alternative Call Routing for Network Bandwidth Management159 Emergency Services conguration 189 Enhanced UNIStim Firmware Download 205 Appendix A Media Redirection Scenarios 209 List of terms 213 Index 218 Procedures Page New in this release Other Subject Intended audiences Related information NTPs Online CD-ROM Description Contents Survivable Remote Gateway Page Page Main ofce hardware description Signaling Server Network Routing Services Supported IP Phones Main ofce requirements Optional features to enhance SRG functionality Normal Mode and Local Mode overview Normal Mode Local Mode Page Survivability Recovery to Normal Mode Local Mode operation Testing the phone in Local Mode Virtual Trunks IP Phone calls Bandwidth Management Overview Network Bandwidth Management Adaptive Network Bandwidth Management Network Bandwidth Management Zones Time of Day SRG IP Phone to local PSTN calls IP Phone to analog (500/2500-type) telephone calls Conference calls Networking consideration CAUTION Capacity Virtual Trunks capacity Branch ofce dialing plan ESN Access Codes Music on Hold Branch ofce and SRG 50 terminology Limitations Page Setting up the main ofce Introduction SRG information required by the main ofce Main ofce information required by the SRG Page Zone parameters Page Conguring zone parameters using CS 1000 Element Manager Page Branch ofce IP Phone conguration at the main ofce Branch ofce IP Phone conguration using TelephonyManager 3.1 Branch ofce IP Phone conguration using LD 11 SIP IP Trunks conguration at the main ofce Conguring SIP IP Trunks Page Page Dialing Plan conguration Overview On-net dialing plan Page Off-net dialing plan Routing calls SRG user call to an SRG PSTN SRG PSTN to an SRG telephone (DID call) SIP/H.323 zones Zone-based digit manipulation Calling Line ID composition CLID verication Conguring the dialing plan for PSTN access to SRG users in Normal Mode Preparing to congure the dialing plan Conguring the dialing plan Page Page Page Page b. Congure the RLIin LD86 with theRLB 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 Page b. Congure the RLIin LD86 with theRLB feature. For example,assume that the PSTN trunk is on route 18 and the Customer number = 0. 2Congure ESN Special Number and Digit Manipulation. Conguring the dialing plan using CS 1000 Element Manager Testing PSTN access using an SRG IP Phone Dialing plan examples Coordinated Dialing Plan Overview Call scenarios Page Page Page Page Option 1 Page Page Page Page Option 2 Page Local Mode: SRG IP Phones are registered to the SRG. Page Page Page Option 3 Page Local Mode: SRG IP Phones are registered at the SRG. Page Uniform Dialing Plan Overview Call scenarios Page Page Page Conguration examples Tocongure the main ofce: Congure the ESN Control Block for UDP in LD 86. Congure Digit Manipulation (DGT) in LD 86. Congure the UDP Location Code (LOC) in LD 90. Congure the UDP HLOC in LD 90. Congure the HLOC in the Customer Data Block in LD 15. Page Page Page Bandwidth Management Contents Introduction Codec negotiation Page Page Codec selection Codec selection algorithms H.323 Master/Slave algorithm SIP Offer/Answer model Best Bandwidth codec selection algorithm Interoperability between CS 1000 and SRG 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 Page End Maintenance using LD 117 Adaptive Network Bandwidth Management Description Call scenario Zone bandwidth management and Adaptive Network Bandwidth Management Page Adaptive Network Bandwidth Management conguration parameters Page 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 The Adaptive Network Bandwidth Management feature can be maintained using Element Manager or LD 117. Maintenance using Element Manager End Maintenance using LD 117 The same information can be displayed using commands in LD 117. Page Page Page Tandem Bandwidth Management overview Application Patch Number Dialing Plan Overview Page Network using Uniform Dialing Plan Common details Differences when every 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 branch ofce 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 branch ofce Page Summary of provisioning procedures for Tandem Bandwidth Management Provisioning Example of TandemBandwidth Management Page Page Page Page Network using mixed Coordinated Dialing Plan and Uniform Dialing Plan Page 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 Coordinated Dialing Plan Page Call between two local branch ofces Call between branch ofces associated with different main ofces Page Alternative Call Routing for Network Bandwidth Management Contents 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 Page 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 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 Maintenance Command Line Interface Element Manager maintenance Enable branch ofce behavior for a zone Suppress alarms Feature operation Page Emergency Services conguration Overview Emergency Services Access Routing Emergency Services Access (ESA) calls Emergency call routing Conguring ESA for the branch ofce Page Reregistering to minimally congured branch ofce Routing conguration for ESA calls on SRG 50 Determining the dialing plan for ESA calls Page Page Page c. Congure Emergency Service Access call recognition for AC + ESDN dialing in LD 90. Emergency Services for Virtual Ofce Emergency Services while logged in to Virtual Ofce Emergency Services while logged out of Virtual Ofce On-Site Notication Conguring the NRS for ESA SPN Testing the ESDN number Conguring ESA using Element Manager Emergency Service using Special Numbers (SPN) Page Page Enhanced UNIStim Firmware Download Description Firmware upgrade Page Page Appendix A Media Redirection Scenarios Page Page Page List of terms Branch ofce CDP dialing plan DSP Gatekeeper gateway H.323 IP LAN Local Mode Main ofce NCS Normal Mode NRS routing SRG 50 TPS UDP VoIP ZDP Index B C D E O P Q R S Page Page Nortel Communication Server 1000 Main Ofce Conguration Guide for SRG 50