When a Windows PC has Cisco VT Advantage installed, it should be connected to the secondary Ethernet port (that is, PC port) of a Cisco IP Phone 7940G, 7960G, or 7970G (or later) model. In most configurations, the PC will be in a different VLAN than the Cisco IP Phone (located in the voice or auxiliary VLAN). In such configurations, all IP-based communication between Cisco VT Advantage and the Cisco IP Phone has to be routed between the VLANs, and only Cisco Discovery Protocol is exchanged directly. The following list explains the call process shown in Figure 29-1:
Figure 29-1. Cisco VT Advantage Call Process
Note
Firewalls or access control lists (ACLs) must permit TCP port 4224 to allow the exchange of Cisco Audio Session Tunnel messages.
Cisco VT Advantage Video Modes
For privacy, the participants can switch to a mode called receive-only mode to prevent the camera from sending a picture to the other end of the call. Table 29-3 shows various scenarios of the calling or the called party activating or disabling receive-only mode.
Cisco VT Advantage Mode on Your PC |
Cisco VT Advantage Mode on the PC of the Other User |
Result |
---|---|---|
Enabled |
Enabled |
When you place or answer a call, two video windows open on your PCyou will see yourself in the Local Video window and the other party in the Remote Video window. |
Receive-only |
Enabled |
When you place or answer a call, you will see the other party in the Remote Video window. The Local Video window will not display. The other party will see a blank image in the Remote Video window. |
Enabled |
Receive-only |
When you place or answer a call, you will see yourself in the Local Video window and a blank image in the Remote Video window. The other party will not see a Local Video window. |
Receive-only |
Receive-only |
No one will see the other party; this mode is similar to a telephone call. |
Note
When Cisco VT Advantage is not running on your PC or on the PC of the remote peer, the call functions as a regular telephone call without video.
Configuring Cisco CallManager for Video |
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
Index