Yamaha ACU16-C Manual page 30

Glossary
CobraNet primary/secondary
ports:
CobraNet interfaces feature built-in redun-
dancy, with primary and secondary ports for connec-
tion to primary and secondary networks. If an
unrecoverable fault should occur on the primary net-
work, CobraNet automatically switches to the sec-
ondary network, providing uninterrupted operation.
Both ports are transformer isolated and fully comply
with the IEEE 802.3 standard.
Conductor:
that acts as wordclock master and network arbitrator.
Only one device can be Conductor at any one time. If
that device is unplugged or fails, another device auto-
matically takes over as Conductor. The conductor
ensures that only one device transmits data in each
bundle at any one time. See also Performer.
Crossover Ethernet cable:
cable whose data transmit and receive conductors
have been swapped. Crossover cables are used to con-
nect two Ethernet devices directly to each other. They
should never be used to connect devices to a hub.
Contrast with Straight Ethernet cable.
CSV:
Abbreviation for Comma Separated Value file.
CSV files, which are commonly used to exchange
table-like data from spreadsheets and databases, use
commas to separate the individual values on each
line. NetworkAmp Manager log files use the CSV for-
mat and can easily be imported into spreadsheet pro-
grams for further analysis.
Ethernet:
The most widely implemented network
protocol. The first implementation 10Base-T sup-
ports data transfer rates of 10 Mbps. The next imple-
mentation, 100Base-T (or Fast Ethernet) supports
100 Mbps. The newest version, Gigabit Ethernet,
supports transfer rates of 1,000 Mbps (i.e., 1 gigabit).
Fast Ethernet:
Ethernet standard that supports data transfer rates of
100 Mbps. CobraNet runs on Fast Ethernet networks.
Full duplex:
allows simultaneous transmission and reception. The
telephone system is a good example of a full-duplex
network. CobraNet is a full-duplex network. Contrast
with Half-duplex.
Gigabit Ethernet:
the Ethernet standard that supports data transfer
rates of 1,000 Mbps. CobraNet supports Gigabit
Ethernet. A Gigabit switched network can handle up
to 1,028 CobraNet audio channels.
The device on a CobraNet network
An Ethernet
Also known as 100Base-T, the
A communications mode that
Also known as 1000Base-T,
Half-duplex:
A communications mode that
allows data transmission in only one direction at a
time. Contrast with Full-duplex.
Hub:
See Repeater hub and Switching hub.
IEEE 802.3:
The IEEE (Institute of Electrical and
Electronics Engineers, Inc.) working group that
develops standards for Ethernet-based local area net-
works).
Isochronous:
Occurring at fixed intervals in
time. Often used to describe real-time communica-
tions between devices in which data must be delivered
at regular intervals. CobraNet transmits digital audio
data isochronously. Contrast with Asynchronous.
LAN (Local Area Network):
that exists in the same building or group of buildings.
CobraNet is a LAN technology. See also WAN.
Managed hub:
A type of switching hub that
improves network efficiency by segregating a LAN
into smaller virtual LANs.
Media converter:
A device that converts from
one type of distribution media to another, for exam-
ple, Ethernet (100Base-TX) to fiber optic
(100Base-FX).
Multicast bundle:
CobraNet bundles 1
through 255 are multicast bundles, which means they
are transmitted to all devices on the network regard-
less of whether any devices are configured to receive
them. Multicast bundles allow point-to-multipoint
connections and can be used with repeater hubs or
switching hubs. Advantages include the ability to dis-
tribute digital audio to any number of devices simply
by configuring those devices to receive the same bun-
dle. Disadvantages are that all available network
bandwidth is used, devices receive all bundles and
must decide for themselves whether to receive or
ignore the data, and any 10Base-T data ports (e.g.,
computers, printers, etc.) will be flooded with data.
This can be stressful for switching hubs, which must
work hard to transmit all incoming data to all output
ports. Contrast with Unicast Bundle.
Network topology:
work. Common network topologies include star, ring,
tree, and bus. Ethernet networks utilizing hubs are
typically wired in a star topology, although a network
may consist of various topologies.
Performer:
The devices on a CobraNet network
that are wordclock slaves. Performers synchronize to
the conductor. See also Conductor.
CobraNet, ACU16-C & NHB32-C Guide
A network
The structure of a net-
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