Multicast Technical Information - Algo 8180 User Manual

Multicast Technical Information

Each 8180, or any Algo IP endpoint involved, has its own IP address,
and shares a common multicast IP and port number (multicast zone) for
multicast packets.
The Master unit transmits to a configurable multicast zone, and all the
Slave units listen to the multicast zones assigned to them. When a
Master unit receives a valid SIP ring event, it will ring locally and also
send out a special packet to the multicast zone. The network switches
and router see the packet and deliver it to all the members of the group.
When a page audio call occurs, the Master unit will transmit all the RTP
audio packets to the multicast zone and all the Slave units will receive
them.
The multicast IP and port number must be the same on all the Master
and Slave units of one group. The user may define multiple zones by
picking different multicast IP addresses and/or port numbers.
1. Multicast IP addresses range: 224.0.0.0/4
(from 224.0.0.0 to 239.255.255.255)
2. Port numbers range: 1 to 65535
3. By default, the 8180 is set to use the multicast IP address
224.0.2.60 and the port numbers 50000-50008
Make sure that the multicast IP address and port number do not
conflict with other services and devices on the same network.
- 19 -