Crestron e-Control, Справочное руководство

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Crestron e-Control
®
Software
Some network devices, including Crestron 2-Series control systems and TPS
Ethernet-enabled touchpanels, can determine the speed of data transfer and
automatically adjust to that speed. This is called
auto-sensing . Any device that has
been labeled “10/100” or “auto-sensing” should be able to work with any standard
Ethernet network devices, regardless of speed, provided that the proper cabling is
used.
Full duplex and half duplex are terms that refer to how data is transferred over a
network. Duplex means "two-way", and describes the sending and receiving of data.
If a device is full duplex, it means that the device sends and receives data
simultaneously. If it is a half duplex device, it alternates between sending and
receiving. Thus, a 100Mbps full duplex device (such as a Crestron 2-Series control
system or TPS Ethernet touchpanel) is actually operating at 200Mbps. A 10Mbps half
duplex device (such as a Crestron X-Series control system or CEN device), alternates
between sending at 10Mbps and then receiving at 10Mbps.
Network Cards
To communicate over Ethernet a device must have an Ethernet network card or
adapter installed. Ethernet network cards (often called
N etwork I nterface C ards, or
NICs) are installed inside a device, while
network adapters are external. Some
Crestron control systems, such as the
MP2E, come with an Ethernet network
card already built in, whereas others like
the PRO2 require separate purchase of a
C2ENET card (shown in the figure). TPS
touchpanels connect to the Ethernet network via a Crestron TPS-ENET or a
TPS-ENETL card.
Ethernet networking also requires at least one hub or switch to act as the central point
of the network. This is because you can’t string multiple devices on an Ethernet
network directly into one another. They must connect at a central point. (However, a
crossover cable can be used when connecting only two devices together.)
Cables, Hubs, and Switches
Special cabling is required to build an Ethernet network. One end of an RJ-45 cable
plugs directly into the device’s Ethernet network card or adapter, and the other end
plugs into a switch, hub, or similar device, connecting that device to the other
networked devices.
RJ-45 connectors look like standard telephone line
connectors, except that they have a set of eight wires
instead of four, which makes the clip wider and
thicker than a telephone connector. The socket into
which the RJ-45 fits can be found on practically all
Ethernet devices, including Crestron control systems,
TPS touchpanels and CEN devices.
The most popular type of Ethernet cabling, and the
type that Crestron recommends for use in e-Control, is
twisted-pair , which looks like
an ordinary telephone cable, except that it has eight wires inside instead of four.
Reference Guide – DOC. 6052 Crestron e-Control®
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