User Guide for SIP VP-T49G IP phone234You can use multicast paging to quickly and easily broadcast time sensitiveannouncements out to people who are listening to a specific multicast group. You canconfigure a multicast paging key or a paging list key on the phone, which allows you tosend a Real Time Transport Protocol (RTP) stream to the pre-configured multicastaddress(es) without involving SIP signaling. You can configure the phone to receive anRTP stream from pre-configured multicast listening address(es) without involving SIPsignaling. You can specify up to 10 multicast listening addresses.To configure a multicast paging key via phone user interface:1. Tap ->Features->DSS Keys.2. Tap the desired line key.3. Tap the Type field.4. Tap Key Event in the pop-up dialog box.5. Tap the Key Type field.6. Tap Multicast Paging in the pop-up dialog box.7. (Optional.) Enter the string that will appear on the touch screen in the Label field.8. Enter the multicast IP address and port number (e.g., 224.5.6.20:10008) in the Valuefield.The valid multicast IP addresses range from 224.0.0.0 to 239.255.255.255.9. Tap the Save soft key to accept the change or to cancel.Multicast paging key is configurable via web user interface at the path DSSKey->LineKey.
