Desk phone video capabilities let you receive
the video signal on your laptop and the audio signal on your desk phone. Physically
connect your computer to the desk phone through the computer port for the client to
establish a connection to the Jabber client. You cannot use this feature with a
wireless connection to your desk phone.
If you have both wireless and wired
connections available, configure Microsoft Windows to not prioritize wireless
connections over wired connections. See Microsoft's An explanation of the
Automatic Metric feature for Internet Protocol routes for more
First, download and install Jabber Desk Phone
Video Services Interface from Cisco.com. Jabber Desk Phone Video Services Interface
provides the Cisco Discover Protocol (CDP) driver. CDP enables the client to:
Desk Phone Video Considerations
Review the following considerations and
limitations before you set up the desk phone video feature:
You cannot have more than one video device connected with CAST. You cannot
use a desk phone with a built-in camera with this feature. If your desk
phone has a local USB camera, remove it before using this feature.
You cannot use this
feature with devices that do not support CTI.
You cannot use both video
screen sharing, using the BFCP protocol, and desk phone video.
It is not possible for
endpoints that use SCCP to receive video only. SCCP endpoints must send and
receive video. Instances where SCCP endpoints do not send a video signal
result in audio only calls.
7900 series phones must
use SCCP for desk phone video capabilities. 7900 series phones cannot use
SIP for desk phone video capabilities.
If you start a call from
a desk phone's keypad, the call starts as an audio call on the desk phone.
Jabber then escalates the call to video. For this reason, you cannot make
video calls to devices that do not support the escalation, such as H.323
endpoints. To use this feature with devices that do not support escalation,
begin calls from the Jabber client.
A compatibility issue
exists with Cisco Unified IP Phones that use firmware version SCCP45.9-2-1S.
Upgrade your firmware to version SCCP45.9-3-1 to use this feature.
Some antivirus or
firewall applications, such as Symantec EndPoint Protection, block inbound
CDP packets. This blockage disables desk phone video. Configure your
antivirus or firewall application to allow inbound CDP packets.
See the following
Symantec technical document for more details about this issue: Cisco IP Phone
version 7970 and Cisco Unified Video Advantage is Blocked by Network
Do not select the
Termination Point Required check box on the SIP trunk
configuration for Cisco Unified Communications Manager (Unified CM). That
setting disables desk phone video.