The provisioned video bandwidth amounts always include room for the audio payload. The payload for G.711 uses 64 kbps of bandwidth, leaving 320 kbps for the video payload.



Cisco recommends adding 20 percent to the requested video bandwidth amount to provide a safe buffer for overhead. 256 kbps * 1.20 = 307.2 kbps reservation.



H.263 is the lowest-common-denominator video codec between an SCCP and H.323 device. If two SCCP devices communicate, they will attempt to use the newer (and more efficient) H.264 codec.



When using the nongatekeeper-controlled intercluster trunks, the only choice you will have for call admission control is the CallManager Location feature. By placing the local IP Phones and intercluster trunk in different locations, you can control how much bandwidth CallManager allows over the trunk.



Within a cluster, CallManager locations control the WAN bandwidth used. This is typically done in a centralized call-processing environment.



The H.320 standard is used to stream video over an ISDN network. To communicate with this standard, you must employ a video gateway.



Videoconferencing requires you use a multipoint control unit (MCU) to mix the signals. SCCP clients can handle a video call (two users), but cannot handle a conference (three users or more).



Far-end camera control (FECC) is an H.323 capability allowing you to remotely control a variety of settings on a video camera.



The Cisco proprietary wideband codec offers impeccable quality, but is considered a "LAN-only" protocol due to the whopping 7 Mbps it consumes.



One of the major features supported by the Cisco CallManager 4.0 release was video (along with the new IP telephony security structure).

Part I: Cisco CallManager Fundamentals

Introduction to Cisco Unified Communications and Cisco Unified CallManager

Cisco Unified CallManager Clustering and Deployment Options

Cisco Unified CallManager Installation and Upgrades

Part II: IPT Devices and Users

Cisco IP Phones and Other User Devices

Configuring Cisco Unified CallManager to Support IP Phones

Cisco IP Telephony Users

Cisco Bulk Administration Tool

Part III: IPT Network Integration and Route Plan

Cisco Catalyst Switches

Configuring Cisco Gateways and Trunks

Cisco Unified CallManager Route Plan Basics

Cisco Unified CallManager Advanced Route Plans

Configuring Hunt Groups and Call Coverage

Implementing Telephony Call Restrictions and Control

Implementing Multiple-Site Deployments

Part IV: VoIP Features

Media Resources

Configuring User Features, Part 1

Configuring User Features, Part 2

Configuring Cisco Unified CallManager Attendant Console

Configuring Cisco IP Manager Assistant

Part V: IPT Security

Securing the Windows Operating System

Securing Cisco Unified CallManager Administration

Preventing Toll Fraud

Hardening the IP Phone

Understanding Cryptographic Fundamentals

Understanding the Public Key Infrastructure

Understanding Cisco IP Telephony Authentication and Encryption Fundamentals

Configuring Cisco IP Telephony Authentication and Encryption

Part VI: IP Video

Introducing IP Video Telephony

Configuring Cisco VT Advantage

Part VII: IPT Management

Introducing Database Tools and Cisco Unified CallManager Serviceability

Monitoring Performance

Configuring Alarms and Traces

Configuring CAR

Using Additional Management and Monitoring Tools

Part VIII: Appendix

Appendix A. Answers to Review Questions


Authorized Self-Study Guide Cisco IP Telephony (CIPT)
Cisco IP Telephony (CIPT) (Authorized Self-Study) (2nd Edition)
ISBN: 158705261X
EAN: 2147483647
Year: 2004
Pages: 329

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