User Guide for the SIP-T48S IP Phone2103. Click Confirm to accept the change.NoteReceiving RTP StreamYou can configure the phone to receive a Real Time Transport Protocol (RTP) stream from thepre-configured multicast address(es) without involving SIP signaling. You can specify up to 31multicast addresses that the phone listens to on the network.NoteHow the phone handles incoming multicast paging calls depends on Paging Barge and PagingPriority Active parameters configured via web user interface.Paging BargeThe paging barge parameter defines the priority of the voice call in progress. If the priority of anincoming multicast paging call is lower than that of the active call, it will be ignoredautomatically. If Disabled is selected from the pull-down list of Paging Barge, the voice call inprogress will take precedence over all incoming multicast paging calls. Valid values in thePaging Barge field: 1 to 31: Define the priority of the active call, 1 with the highest priority, 31 with the lowest. Disabled: The voice call in progress will take precedence over all incoming paging calls.Paging Priority ActiveThe paging priority active parameter decides how the phone handles incoming multicast pagingcalls when there is already a multicast paging call on the phone. If enabled, the phone willignore incoming multicast paging calls with lower priorities, otherwise, the phone will answerincoming multicast paging calls automatically and place the previous multicast paging call onhold. If disabled, the phone will automatically ignore all incoming multicast paging calls.To configure multicast listening addresses via web user interface:1. Click on Directory->Multicast IP.2. Select the desired value from the pull-down list of Paging Barge.3. Select the desired value from the pull-down list of Paging Priority Active.If G722 codec is used for multicast paging, the touch screen will display the icon to indicatethat it is providing high definition voice.Default codec for multicast paging is configurable via web user interface only.RTP stream is listened in the speakerphone mode by default. If you want to listen the RTP streamusing the engaged audio device (speakerphone, handset or headset), contact your systemadministrator for more information.Fixed volume to play RTP stream for specified paging group is configurable by your systemadministrator.
