User Guide for the SIP-T42G IP Phone134You can use multicast paging to quickly and easily broadcast time sensitiveannouncements to users who are listening to a specific multicast group. You canconfigure the paging list on the phone, which allows you to send a Real Time TransportProtocol (RTP) stream to the pre-configured multicast address(es) without involving SIPsignaling. You can configure the phone to receive an RTP stream from pre-configuredmulticast listening address(es) without involving SIP signaling. You can specify up to 10multicast listening addresses.To configure paging list via phone user interface:1. Press Menu->Features->Paging List.2. Press or to select a desired paging group.The default tag is Empty if it is not configured before.3. Press the Option soft key, and then press the Edit soft key.4. Enter the multicast IP address and port number (e.g., 224.5.6.20:10008) in theAddress field.The valid multicast IP addresses range from 224.0.0.0 to 239.255.255.255.5. Enter the group name in the Label field.6. Press the Save soft key to accept the change.