Crown IQ-PIP-USP3, Справочное руководство

Страница: 35 / 48

page 35
Reference Manual
IQ-PIP-USP3/CN
5.3.6 Switched Networks
A more complex CobraNet network can be built using Ethernet Switches.* Ethernet switch-
ing technology is more sophisticated than hubs. Switches do not simply broadcast each and
every packet to all nodes. Instead, they can interrogate each incoming packet transmission
to determine its destination and (very quickly) transmit the data to only that destination port.
This allows for more overall network traffic. In effect each port has 100MB of bandwidth and
the overall network can be as large as 100MB times the number of ports on the network.
Switched networks allow both multi-cast and uni-cast CobraNet Bundles. Uni-cast trans-
missions can only be received by a single node and are typically used for point-to-point
routing. This technique leverages Ethernet switching technology to significantly conserve
overall network bandwidth and in-turn allow many more Bundles and Audio Channels.
Another enhancement available with most switched network environments is “full-duplex”
links. A full-duplex link allows simultaneous send and receive over the same Ethernet con-
nection. This allows simultaneous send and receive of up to 64 channels per node for a total
of 128 channels. That said, please keep in mind that today’s CobraNet node designs are only
capable of 64 channels (32 in and 32 out).
The combination of switching and full-duplex technologies in switched CobraNet networks
allows up to 128 channels per node and greater than 3000 individual uni-cast channels.
There is no limit to the number of active receivers on a switched CobraNet network.
Switched networks also allow control traffic such as PCs, to coexist on the same network as
CobraNet devices.
*See Tested Ethernet Products on the Peak Audio website at www.peakaudio.com/CobraNet
for a list of recommended Ethernet switches.