Comrex BRIC-Link II, Product Manual

Page: 83 / 104

XIV.
IP MULTICAST
IP Mul cast is an e ffi cient way of delivering BRIC-Link II digital audio streams to mul ple loca ons within a
compa ble network. This method involves relying on the network to distribute the stream to the loca ons that
require it, rather than crea ng an independent stream for each intended receiver.
Performing an IP Mul cast requires the use of an IP Mul cast-capable network . The commercial Internet, with few
excep ons, is not capable of suppor ng IP Mul cast. Some private LANs and WANs are IP Mul cast capable.
IP Mul cast does not support Duplex connec ons, and only supports a single-direc on (i.e., Simplex) stream. An
encoder can not receive input streams when mul cas ng. CrossLock is not supported and should be turned o
ff for
all IP Mul cast connec ons.
The following sec on presupposes that IP Mul cast users will be familiar with the basic concepts of setup and
opera on of the network, and will thus focus on how to con
fi gure BRIC-Link II for Mul cast mode.
MULTICAST PROFILES
To con fi gure BRIC-Link II for Mul cast, a custom Audio Pro fi le must be created in the Pro fi le Manager Tab for either
a Mul cast Sender or a Mul cast Receiver. As shown in Figure 72 , when de fi ning a new pro fi le there is the op on to
choose a Channel for the audio stream. When the non-standard channel called “ Mul cast” is selected, the op ons
available under “Pro fi le Se ngs” will change. Mul cast pro fi les have fewer op ons than other pro fi le types, and
some of the available op ons will have no e ff ect (e.g. se ng an encoder type on a Mul cast receiver has no e ff ect).
The important se ngs for Mul cast are:
• Sender/Receiver - Determines whether this par cular BRIC-Link II is intending to generate and encode the
IP Mul cast stream (the Sender); or to retrieve and decode an exis ng stream (the Receiver).
• Encoder Type - Determines the algorithm format of the stream to be used by the encoder of the Mul cast
Sender—not relevant for Receivers.