User Guide

Table Of Contents
Redial a Contact when the Contact is Available
When you place a call to a contact and the contact’s line is unavailable due to an unregistered line or a
service outage, a notification displays on your phone when the contact’s line is available again, and you
can choose to call the contact from the notification.
Check with your system administrator to find out if this feature is available on your phone.
Procedure
» When the contact availability notification displays, select Dial.
Choosing a Protocol for Audio Calls
Your system administrator can set up your phone to handle calls that use the SIP protocol, the H.323
protocol, or both and enable you to choose the protocol you want to use before placing a call.
Contact your system administrator to find out if calling with the H.323 protocol is enabled on your phone.
When your phone supports the H.323 protocol, the following limitations apply:
You cannot forward or transfer H.323 calls.
You cannot set up forwarding for lines that use the H.323 protocol only.
You cannot set up shared lines on lines that use the H.323 protocol.
You cannot place a call by just an H.323 name. You must use URL dialing using the following
format: <H.323 name>@<server name>.
For dual-protocol phones, the protocol is displayed next to all call IDs, including the call IDs for
conference call participants and calls on hold.
Place an Audio Call using H.323
By default, your phone uses the SIP protocol or URLs to place audio calls. You can choose to use H.323
Protocol to place calls on VVX 1500, 500/501, and 600/601 phones.
Procedure
1. Select New Call.
2. In the Dialer, tap Use H.323 to place an H.323 call.
H.323 is displayed in the number field. Your phone uses the H.323 protocol for all subsequent
calls until you select a different protocol.
3. Enter your contact's H.323 URL name.
For example, VVX500@100.100.100.100.
Set a Protocol for Placing Calls Automatically
Your system administrator can set up your phone so that you can enable it to automatically select the
protocol to use for all calls.
When you place calls from call lists or directories, your phone automatically chooses the protocol to use
based on the information in the call list or directory. When you add a contact to your Contact Directory,
you can specify the protocol the contact uses to handle calls. This enables your phone to automatically
use the correct protocol when you dial the contact.
Procedure
1. Tap New Call.
2. In the Dialer, tap Use Auto to enable your phone to automatically select the protocol to use.
Audio Calls
Polycom, Inc. 46