NEC Univerge SV8100 Features And Specifications Manual page 1482

Issue 5.0
You can assign up to 16 IP phones in an Internal or All call paging group.

When using Unicast mode, there must be an available DSP recourse for each IP phone in

the page group at the time of the internal page. If the resources are less than the number of
IP phones, the page will be delivered to the IP phones with the lowest port numbers. IP
phones that cannot obtain a DSP resource will not receive the page.
IP terminals (DT7XX) via NAT cannot utilize Multicast paging. These terminals must use

Unicast paging.
The ability to assign Unicast or Multicast on an IP phone basis, is restricted to internal

paging only. Other Multicast features (External MOH, Background Music, Room Monitor)
cannot utilize Unicast.
For an IP terminal to utilize the Multicast feature the IP terminal must have a gateway

programmed to accomplish the multicast transmission. When an actual gateway device
does not exist on the network, a dummy gateway address on the same subnet must be
defined.
When utilizing Multicast mode and a page group consists of all IP phones, the page is sent

via a multicast message from the initiating phone. If a paging group has IP and TDM
phones, when an IP phone initiates the page, a message is sent to the IPLA and the IPLA
sends the Multicast message for the IP phones.
MH240 and SIP Dect Wireless phones cannot receive an Internal Page.

When using the G.711 Codec for multicast paging, only 10ms, 20ms, 30ms, and 40ms

frame sizes can be used.
Default Setting
Multicast
System Availability
Terminals
All DT7XX IP terminals
Required Component(s)
Version 3000 or higher software

DT7XX IP terminal

CD-CP00-US and CD-(XX)IPLA

2 - 1456
UNIVERGE SV8100
Unicast/Multicast Paging Mode