In addition to the global Cisco CallManager parameters that are needed for a video-enabled IP telephony network, you have to configure the individual devices (IP phones) to support video calls. The Cisco IP Phone requires Cisco CallManager for call processing and the appropriate phone load to support video on the IP phone. When you are configuring IP phones for video in Cisco CallManager, you will need to ensure you have configured these settings:
Verifying Phone Loads
As shown in Figure 29-3, CallManager assigns each device type a phone load that it will use from the TFTP server. Devices must use phone load 6.0(3) or later for the Cisco IP Phone 7940 and 7960 models to support the Cisco VT Advantage. For the Cisco IP Phone 7970, use the phone load 6.0(1) or later. To verify the phone loads, from the Cisco CallManager Administration, choose System > Device Defaults.
Figure 29-3. Configuring Phone Load Defaults
You can always download the latest phone loads from Cisco.com.
Configuring IP Phones to Support Video
The IP phone configuration settings that are required for video support can be found in the IP Phone Configuration window (shown in Figure 29-4) of Cisco CallManager Administration.
Figure 29-4. Configuring IP Phones to Support Video
The IP phone settings need not be configured before Cisco VT Advantage can be loaded on the client PC. But the preferred sequence is to configure the IP phone first and then install the Cisco VT Advantage software.
Because the PC that has Cisco VT Advantage installed needs to be physically connected to a PC port of the IP phone, ensure that the PC port of the IP phone is not disabled in the Cisco CallManager IP phone configuration. By default, the PC port is enabled.
When the Video Capabilities field is set to Enabled, the phone will participate in video calls when connected to an appropriately equipped PC. Make sure that this feature is enabled on Cisco IP Phones that operate with Cisco VT Advantage. Video capability is disabled by default.
In addition, a video-enabled Cisco IP Phone can be configured to retry video calls as audio calls if the video call cannot be set up. The Retry Video Call as Audio check box is located in the Phone Configuration window, shown in Figure 29-5, and this feature is activated by default. To enable the Retry Video Call as Audio feature, choose Cisco CallManager Administration > Device > Phone.
Figure 29-5. Enabling Retry Video Call as Audio
Verification of Phone Configuration
An IP phone enabled for video displays a video camera icon in the lower-right corner of its liquid crystal display (LCD) screen, as shown in Figure 29-6. A PC with Cisco VT Advantage installed does not have to be connected to the IP phone to produce the video camera icon. The camera icon is displayed as soon as video is enabled for the IP phone in Cisco CallManager configuration.
Figure 29-6. Verification of Phone Configuration
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