Unicast/Multicast Paging Mode 1 - 1033UUnicast/Multicast Paging ModeDescriptionWith V 3.0 or higher software the IP terminals (DT7XX) can now receive an Internal Pagevia a Unicast or Multicast packet based upon system programming. This feature allows IPterminals (DT7XX) to be assigned to Unicast Mode, Multicast Mode, or Auto. Prior to V 3.0,Unicast paging was not an available option.When the phone is set to Unicast Mode the internal paging is sent to the phone via a UnicastPacket.When the phone is set to Multicast Mode the internal page is sent to the phone via aMulticast Packet.When the phone is set to Auto, the internal page is sent to the phone either by Multicast orUnicast based on the subnet of the IP station. If the DT7XX terminal is in the same subnet asthe IPLA then it will receive the Internal Page via a Multicast Packet. If the DT7XX terminal isin a different subnet than the IPLA the DT7XX will receive the Internal Page via a UnicastPacket.When phones are set to receive Unicast packets the IPLA will send a separate RTP stream toeach phone that is set to receive the page. E.g. If there are five DT7XX IP phones in thepage group and they are all set to Unicast Page Mode the IPLA will send five separate RTPstreams utilizing five DSP resources.When the phones are set to receive Multicast packets the IPLA will send one RTP stream.Multicast is a protocol that allows one device to communicate to multiple devices without theneed to stream to the individual end point. E.g. If there are five DT7XX IP phones in the pagegroup that are set to Multicast Mode, the IPLA will send one RTP stream utilizing only oneDSP resource.EnhancementsThis feature added with Version 3.
