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Installation
Configuring Dialing Options
You can choose voice and video dialing options during the initial conguration, when performing a system reset, or at any
other time by accessing Administrator Preferences : Communications : General.
Receiving Presentations
This system can receive and initiate presentations during a call through a secondary H.239 media channel.
By default, the presentation function is enabled.
To disable presentations access Administrator Preferences : Communications : General : Presentations.
Consider disabling the presentation function if your system experiences interoperability issues with third party systems that
do not support presentations.
NOTE
Virtual Link (Data Sharing)
Virtual Link allows this system to share IP-based presentation data during call.
For the most current product information, including a summary of new features, resolved and known issues,
interoperability with third party products, and documentation errata, refer to the Release Notes at www.lifesize.com/
support.
Specifying H.323 Settings
By default, this system supports the H.323 protocol for placing and receiving video and voice calls.
You can disable support for H.323 calls by selecting Disabled for the H.323 preference in Administrator Preferences :
Communications : H.323 when the system is not in a call.
If you choose Disabled for the H.323 preference, the system cannot place or receive calls with the H.323 protocol.
NOTE
If both H.323 and SIP preferences are set to Disabled, a warning message appears and indicates that video calls cannot be
placed or received with this conguration.
When H.323 is enabled, you can specify an H.323 name or extension to use when placing a call. The H.323 name and
extension identify the device to the gatekeeper. Any registered device can dial another one using this name and extension.
The H.323 Name preference is an optional value that is used when a gatekeeper is congured and requires the system to
register with an H.323 ID. If the gatekeeper administrator assigns an H.323 ID for the system, enter that ID for the H.323
Name preference. The H.323 Extension preference is an optional value that is used when a gatekeeper is congured and
requires the system to register with an E164 number or extension. If the gatekeeper administrator assigns an E164 number or
extension for the system, enter that number for the H.323 Extension preference.
Set the Gatekeeper ID only if the gatekeeper requires it (for example, congurations with multiple gatekeepers). The
Gatekeeper ID must match the gatekeeper ID congured for the gatekeeper to which the system is registering. Do not
congure this preference if the gatekeeper does not require it, as this may result in failure to register with the gatekeeper.
Set the Gatekeeper Mode preference to Auto if you wish to have the system automatically discover a gatekeeper. You can
also set the Gatekeeper Mode preference to Manual to manually choose a gatekeeper. If set to Manual, specify the IP address
and port for the primary gatekeeper.
When you select the Register button in Administrator Preferences : Communications : H.323, icons appear in the status
bar to indicate the status of the registration process with the H.323 gatekeeper. The yellow H.323 icon appears when
your system is trying to register with the gatekeeper. If the registration fails, the red H.323 icon appears. If the system
is registered to a gatekeeper, the system displays its status.
Conguring a secondary H.323 gatekeeper with the Gatekeeper IP Address 2 and Gatekeeper Port 2 preferences is optional.