Advanced Phone Features
63
Configuring Multicast Listening Addresses
You can configure the phone to receive a Real-time Transport Protocol (RTP) stream from the
pre-configured multicast address(es) without involving SIP signaling. You can specify up to 10
multicast addresses that the phone listens to on the network.
To configure multicast listening addresses via web user interface:
1. Click on Paging Groups->Listening Group N.
2. Enter the group name in the Description field.
3. Enter the multicast IP address (for example: 224.5.6.21) in the IP Address field.
The valid multicast IP addresses range from 224.0.0.0 to 239.255.255.255.
4. Enter the multicast IP port number (for example: 10008) in the Port field.
5. Repeat the step 2-4, you can add more listening groups.
6. Click Save changes to accept the change.
7. Perform auto provisioning on the phone to download above configurations. For more
information on how to perform auto provisioning, refer to Downloading Configuration
Files on page 39.
Handling Incoming Multicast Paging Calls
How the phone handles incoming multicast paging calls depends on Paging Barge and Paging
Priority Active parameters configured via CommPortal phone configurator.
Priority Paging Group
The priority paging group defines the priority of the voice call in progress. If the priority of an
incoming multicast paging call is lower than that of the active call, it will be ignored
automatically. If priority paging group is disabled, the voice call in progress will take precedence
over all incoming multicast paging calls. Valid values in the priority paging group field:
1 to 10: Define the priority of the active call, 1 with the highest priority, 10 with the lowest.
0: The voice call in progress will take precedence over all incoming paging calls.
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