Cisco introduced its IP video telephony solution in Cisco CallManager Release 4.0. With this solution, video is fully integrated into Cisco CallManager, and new endpoints are available from Cisco and its strategic partners. Video is now just as easy to deploy, manage, and use as a Cisco IP Phone.
The Cisco IP video telephony solution consists of products and solutions:
Cisco CallManager Release 4.0 and later adds support for video in both the SCCP and H.323 protocols. Cisco CallManager can now manage H.323 endpoints, MCUs, and gateways, providing the system administrator with PBX-style control over all call routing and bandwidth management for those devices.
The video telephony solution consists of end-user devices, infrastructure, and applications. The end-user devices include video phones, soft video phones for remote workers (such as Cisco IP Communicator 2.0), and desktop environments that incorporate existing telephones and desktop computers. Additionally, the existing H.323 endpoints that the customers already own will become part of the video telephony environment.
Cisco CallManager is the center of the IP telephony infrastructure and supports both voice and video telephony. Cisco CallManager provides a single dial plan for all endpoints; there is no need for an additional video dial plan. The same applications are still supported: voice mail, conferencing, and scheduling for audio and video resources are possible.
The video stream mixing is accomplished by the MCU. In a Cisco CallManager environment, the MCU can be SCCP or H.323 or SCCP- and H.323-controlled. The main difference is that the H.323-controlled MCU needs an H.323 gatekeeper to register.
To allow external H.320 parties to participate in a videoconference, a video gateway, such as the Cisco IP/VC 3521 BRI Videoconferencing Gateway or IP/VC 3526 PRI Videoconferencing Gateway, is required. The normal voice gateways used in the Cisco CallManager environment do not support ISDN B-channel bonding and cannot route video calls from and to the public switched telephone network (PSTN).
Video Call Concepts
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
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
Configuring Alarms and Traces
Using Additional Management and Monitoring Tools
Part VIII: Appendix
Appendix A. Answers to Review Questions