EV-2 Datasheet, PDF (24/44 Pages) Cirrus Logic – Digital Audio Networking Processor

CobraNet™ EV-2
Ethernet
A Local Area Network (LAN) technology that allows transmission of information between
computers. Ethernet is, by far, the most widely deployed LAN standard worldwide.
Fast Ethernet
A newer version of Ethernet, also known as 100BASE-T. It supports data transfer rates of
100Mbps. CobraNet operates on a Fast Ethernet network.
Full Duplex
Data can be transmitted and received simultaneously.
Half Duplex
Data can only be transmitted in one direction at a time.
Hub
Hub is not a technically concise term. The term can be used to refer to either a Repeater Hub
or a Switching Hub.
Mbps
Short for megabits per second, it is a measure of data transfer speed.
Multicast Addressing
Data which is Multicast is addressed to a group of, or all DTEs on a network. All DTEs receive
multicast addressed data and decide individually whether the data is relevant to them. A
Switched Hub is typically not able to determine appropriate destination port or ports for
multicast data and thus must send the data out all ports simultaneously just as a Repeater
Hub does. Multicast addressing is to be avoided when possible since it uses bandwidth
network wide and since all DTEs are burdened with having to decide whether multicast data
is relevant to them.
Multicast Bundle
A multicast Bundle supports a one-to-many routing of audio on the network. Ethernet
multicast addressing is used to deliver a multicast Bundle. Because a multicast bundle
consumes bandwidth network-wide, use of this delivery service must be rationed on a
switched network.
Network Topology
The physical and logical relationship of nodes in a network; i.e., a star, ring, tree, bus, etc.
Node
A processing location. A node can be a computer, a switch, a CobraNet device, or any other
device that has a unique network address.
Repeater Hub
An Ethernet multi-port repeater. A data signal arriving in any port is electrically regenerated
and reproduced out all other ports on the hub. An Ethernet network is typically wired in a star
configuration and the hub is at the center. The use of hubs requires that all devices on the
network run in half duplex mode.
Run Length
Each type of media has a limitation in the length of a point-to-point run between two devices.
When maximum run length guidelines are exceeded it may not be possible to establish a
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