Comrex BRIC-Link II, Руководство по эксплуатации продукта

Страница: 84 / 104

In addi on to the basic op ons for IP Mul cast pro fi les, enabling the Show Advanced op on will allow se ng
many of the same Advanced Op ons available for BRIC Normal (Unicast) pro fi les.
SETTING UP A MULTICAST REMOTE
Using this con fi gura on, BRIC-Link II does not communicate directly with the other codecs in the link. All codecs
involved in a Mul cast must ini ate independent connec ons to a designated network IP address. A Mul cast
Sender must ini ate an outgoing stream, and a Mul cast Receiver must ini ate an incoming stream. These
connec ons use Remote entries that are con
fi gured within a special IP address range known as a “Mul cast Block”,
typically 224.0.0.0 to 239.255.255.255 .
To establish a Mul cast connec on:
1. De fi ne a Remote entry as having an IP address within the IP Mul cast Block,
2. Select an IP Mul cast pro fi le (as either a “Sender” or “Receiver”),
3. Press Connect .
A codec connec ng to a designated IP address as the Sender will encode audio and provide a single stream into
the network. Codecs connec ng to the designated IP address as the Receiver will pull the stream from the network
and decode the audio as normal. The network provides the stream to any number of units that request it; meaning,
addi onal codecs can connect as
Receivers without any addi onal workload on the part of the Sending codec.
TIME TO LIVE
Time-to-Live (TTL) is a variable set by Mul cast encoders to determine how long a packet is processed before
it is dropped by the network. The default value of TTL in BRIC-Link II is 0, which limits its use to within a LAN
environment. TTL may be manually changed on a
Mul cast Sender remote by con fi guring the IP address
followed by a “/”, followed by the TTL value. An example remote Mul cast encoder could be set for the address
224.0.2.4/255, which would signify an address with the Mul cast Block with a TTL of 255 (which is the max value
available).
CHANGING PORT NUMBERS FOR MULTICAST
The default port of UDP 9000 may also be changed on Mul cast remote entries. The port number is assigned in the
standard socket format, directly a er the IP address, preceded by “:”, followed by the TTL. As an example, the IP
address of a Mul cast Sender on port 443 with a TTL of 100 would read:
224.0.2.4:443/100 .