Operation Manual
Chapter 3: Using Video and the Polycom VVX Camera
85
Calling Using the H.323 Protocol
Note: H.323 Limitations
Handling calls that use the H.323 protocol is an optional feature that your system administrator
enables. For more information, contact your system administrator. If your phone supports the
H.323 protocol, be aware of the following limitations:
You cannot forward or transfer H.323 calls.
You cannot set up forwarding for lines that just use the H.323 protocol.
You cannot set up shared lines for lines that use the H.323 protocol.
You cannot place a call by just entering an H.323 name. To place a call using an H.323
name, use URL-dialing mode and enter the following format for the URL:
<H.323 name>@<server name>
For example: VVX101@100.100.100.100
Your system administrator can set up your phone so that it can handle calls that use either the SIP or
H.323 protocol, or both protocols. Your phone may be set up so that a line can handle one or both
protocols.
If your phone can handle calls using both protocols, you may be able to choose the protocol to use
before you tap Dial or Send, or before a call is automatically placed. You may also be able to choose to
allow your phone to automatically select the protocol to use.
If your phone is set up to handle both protocols, you may be able to choose a protocol before you place
a call using one of the following methods:
Soft key method
Soft keys display to allow you to choose the protocol. Tap Use SIP, Use H.323, or Use Auto one or more
times to toggle between Use SIP (to place a SIP call), Use H.323 (to place an H.323 call), or Use Auto (to
allow your phone to automatically select the protocol to use). The protocol you select displays in the
title bar. Your phone will use the selected protocol for all subsequent calls, unless you select a different
protocol.
Dialog box method
A dialog box displays to allow you to choose the protocol. Tap Use SIP (to place a SIP call) or Use H.323
(to place an H.323 call).
For dual-protocol phones, the protocol displays next to all call IDs, including the call IDs for conference
call participants and calls on hold.