Aastra 9480i User Manual page 172

Additional Features
If an RTP multicast session already exists on the phone, and the phone receives another incoming RTP multicast session,
the priority is given to the first multicast session and the second multicast session is ignored. The behavior for the incom-
ing calls in this case is also based on the setting for the "Allow Barge-in" parameter. The incoming call is handled as if
there were an existing call already on the phone.
Configuring Group RTP Paging
Aastra Web UI
Use the following procedure to configure RTP streaming on the receiving end for Paging applications using the Aastra
Web UI.
1. Click Basic Settings->Preferences->Group Paging RTP Settings.
2. In the "Paging Listen Addresses" text box, enter the multicast IP address(es) and port number on which the phone
listens for incoming multicast RTP packets.
Enter the IP address in dotted decimal format.
(for example, 239.0.1.15:10000,239.0.1.20:15000)
You can enter up to 5 listening multicast addresses.
If this field is blank, the Paging Listening capability is disabled on the phone.
Notes:
1. Recipient of a Paging call can set a global "Do Not Disturb" (DND) to ignore any incoming pages.
2. For incoming Paging, the phone uses the Intercom configuration settings. The incoming Page is dependant on the
"Allow Barge-In" parameter setting and the "Idling/On Call" state.
3. Click Save Settings.
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