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Operations Guide 930500E CyberData Corporation
41
Installing the VoIP V3 Indoor Intercom
Configure the Multicast Parameters
2.4.9 Configure the Multicast Parameters
Multicast groups use multicasting to create public address paging zones. Multicasting is based on
the concept of a group. Multicast addresses specify an arbitrary group of IP hosts that have joined
the group and want to receive traffic sent to the group. Group members send IGMP messages to
their local multicast routers, allowing the group traffic traversal from the source.
The Multicast Configuration page allows the Intercom to join up to 10 paging zones for receiving
ulaw/alaw encoded RTP audio streams. A paging zone can consist of one or many CyberData
multicast group-enabled products. There is no limit to how many devices can be in a given paging
zone. Each multicast group is defined by a multicast address and port number. Each multicast group
is assigned a priority, allowing simultaneously arriving pages to be serviced based on importance.
Multicast groups are compatible with IGMP through version three. The Intercom supports
simultaneous SIP and Multicast.
1. Click on the Multicast Configuration button to open the Multicast Configuration page. See
Figure 2-20.
Figure 2-20. Multicast Configuration Page