Unicast/Multicast Paging Mode - NEC Univerge SV8100 Features And Specifications Manual

UNIVERGE SV8100 Issue 13.0

Unicast/Multicast Paging Mode

Enhancements
This feature added with Version 3000.
Description
With Version 3000 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 Version 3000, 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.
Unicast/Multicast Paging Mode 2 - 1787