Unicast/Multicast Paging Mode - NEC UNIVERGE SV8100 Features & Specifications Manual

Unicast/Multicast Paging Mode

Enhancements
This feature added with Version 3.
Description
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With V 3.0 or higher software the IP terminals (DT7XX) can now receive an Internal Page
via a Unicast or Multicast packet based upon system programming. This feature allows IP
terminals (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 Unicast
Packet.
When the phone is set to Multicast Mode the internal page is sent to the phone via a
Multicast Packet.
When the phone is set to Auto, the internal page is sent to the phone either by Multicast or
Unicast based on the subnet of the IP station. If the DT7XX terminal is in the same subnet as
the IPLA then it will receive the Internal Page via a Multicast Packet. If the DT7XX terminal is
in a different subnet than the IPLA the DT7XX will receive the Internal Page via a Unicast
Packet.
When phones are set to receive Unicast packets the IPLA will send a separate RTP stream to
each phone that is set to receive the page. E.g. If there are five DT7XX IP phones in the
page group and they are all set to Unicast Page Mode the IPLA will send five separate RTP
streams 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 the
need to stream to the individual end point. E.g. If there are five DT7XX IP phones in the page
group that are set to Multicast Mode, the IPLA will send one RTP stream utilizing only one
DSP resource.
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