Configuring Cisco IP Phones for Cisco VT Advantage

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:

  • Make sure that a phone load that supports video is installed on each Cisco IP Phone that will be video-enabled.
  • The port labeled "PC" on the back of the Cisco IP Phone connects a PC or a workstation to the IP phone so that they can share a single network connection. Make sure that this feature is enabled on Cisco IP Phones that operate with Cisco VT Advantage.
  • The Cisco IP Phone has to be configured to support video calls.
  • Check or uncheck the Retry Video Call as Audio check box. When the Retry Video Call as Audio check box is checked, a Cisco IP Phone that cannot obtain the bandwidth that it needs for a video call will retry the call as an audio call.
  • Verify that the Cisco IP Phone is video-enabled after configuring the IP phone in Cisco CallManager configuration.

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


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

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 © 2008-2020.
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