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User Guide for the Polycom VVX 1500 C Business Media Phone for Cisco Unified Communications Manager (SIP)
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Placing Calls Using the H.323 Protocol
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 the Dial or Send soft key, 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 the Use SIP,
Use H.323, or Use Auto soft key 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).
Note
Handling calls that use the H.323 protocol is an optional feature that your system
administrator enables. Your system may not support it or have an H.323 license.
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, enter URL-dialing mode and enter the following format for the
URL:
<H.323 name>@<server name>
For example: VVX101@100.100.100.100