The icon of a video camera on the Cisco IP Phone status line means that the Cisco IP Phone is configured to support video. This occurs when the administrator enables video capabilities in the CallManager Administration utility.
Cisco requires you to plug the PC with Cisco VT Advantage client software into the access port of the IP phone. This allows the IP phone to recognize the client PC (and installed software) and enable video capabilities for incoming and outgoing calls.
A and C
The Cisco Audio Session Tunnel is a Cisco proprietary protocol used to signal between the VT Advantage software and IP phone. RTP is used to stream video.
E, F, and G
Only the Cisco 7940, 7960, and 7970 IP Phones (and later) can support video.
B and C
Both the PC port and Retry Video Call as Audio settings are enabled by default. You must enable the video capabilities of the IP phone to support VT Advantage.
The gatekeeper always requests double the amount of bandwidth required by the codec to allow sufficient room for overhead.
The only camera hardware supported by the VT Advantage software is the Cisco VT Camera.
The Cisco proprietary wideband codec offers impeccable quality, but is considered a "LAN-only" protocol due to the whopping 7 Mbps it consumes.
The VT Advantage software can stream up to 30 fps. This level produces extremely smooth (TV quality) video streams.
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