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Software Crestron e-Control

Ethernet Networking

NOTE: This section reviews basic Ethernet and IP networking principles that form

the foundation for e-Control. Even if you are familiar with these terms or have prior

networking experience, the material contained here will help you better understand

how Crestron implements e-Control. You can also refer to “Appendix A: Glossary”

on page 46 for a list of networking terms and acronyms used throughout this guide.

A network is any collection of independent computers, printers, and peripheral

devices that are connected by cables. A network incorporating e-Control will also

typically include connected Crestron control systems, network control modules, and

touchpanels that control AV, lighting, and other equipment. Information travels over

the cables, allowing users on the network to communicate, exchange data, and

control equipment. Each device that is connected to the network is called a node.

Networks can have tens, thousands, or even millions of nodes.

Local Area Networks (LANs) are usually confined to a geographic area, such as a

single building or a college campus. LANs can be small, linking as few as two or

three computers, but often can link hundreds of computers used by thousands of

people. Wide Area Networks

(WANs) such as the Internet

combine multiple LANs that are

geographically separate.

Switch or Hub

Network Cable

The development of standard

networking protocols and media

has resulted in worldwide

proliferation of LANs

throughout business and

educational organizations. The

most popular LAN technology

in use today, and the standard

that is the basis for e-Control, is

Ethernet, which consists of

computers and devices cabled

together according to specific

rules defined by the Institute for

Electrical and Electronic

Engineers (IEEE).

Ethernet networks are categorized by how fast they can transfer data. Speed is

expressed in megabits per second (Mbps) and even gigabits per second (Gbps). One

"bit" is equal to 1/8th of a character, letter, or number. Standard Ethernet operates

at 10Mbps, which is fast enough for most networking tasks. Crestron’s X-Series

control systems and CEN devices operate at 10Mbps. Fast Ethernet, by contrast,

operates 10 times faster at 100Mbps, making it ideal for video, multimedia, and other

speed-intensive applications. Crestron’s 2-Series control systems and TPS Ethernet-

enabled touchpanels can operate at 10Mbps or 100Mbps. Fast Ethernet and Standard

Ethernet are not readily compatible; making the two speeds communicate on the

same network requires special equipment such as a switch.

2 • Crestron e-Control® Reference Guide – DOC. 6052

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