Extron electronics IPL T SF24 Series User Manual page 43

Glossary
Glossary
10/100Base-T is Ethernet which uses unshielded twisted pair
(UTP - Cat 5, etc.) cable, where the amount of data transmitted
between two points in a given amount of time is equal to either
10 Mbps or 100 Mbps.
Address Resolution Protocol (ARP) is a protocol which assigns
an IP address to a device based on the device's MAC or physical
machine address.
Custom Web page is any file that can be loaded into an IPL box
and served by the IPL's internal Web server. A custom Web page
can provide control of devices attached to the IPL without use of
the Global Viewer (GV) or Global Viewer Configurator (GVC)
software. This is true with or without an accompanying event
script. Any number and size of graphics can be used, but if they
are too large to fit on the IPL, you can write your Web page so
that they can be served from another Web server. If you install
Microsoft Internet Information Services (IIS) on your desktop,
you can serve any page on its hard disk. The IPL functions like a
little computer with a Web server—you can use it for various
Web tasks.
DHCP is the Dynamic Host Configuration Protocol (DHCP), a
standardized communications protocol that enables network
administrators to locally and automatically manage the
assignment of IP addresses in an organization's network.
Driver is a Global Viewer Configurator (GVC) compatible
package. It includes the event script that controls devices.
Ethernet is a network protocol that uses MAC addresses instead
of IP addresses to exchange data between computers. Using
ARP (see above) with TCP/IP support, Ethernet devices can be
connected to the Internet. An Ethernet LAN typically uses
unshielded twisted pair (UTP) wires. Ethernet systems currently
provide transmission speeds of 10 Mbps or 100 Mbps.
Event script is a program that runs on an IPL box and issues
queries and commands to the attached devices. Event scripts are
written in the "Extron C" language (.sc), and compiled into an
event script (.evt). The Global Viewer Configurator performs
this compilation. The compiled result (.evt) is loaded onto the
IPL box. The Extron C language is similar to ANSI C, with some
differences. As long as event scripts are turned on, event scripts
run continuously on the box.
Floating is the condition of a device or circuit that is not
grounded and not tied to any established potential.
IPL T SF24 and IPL T SFI244 • Glossary
B-2
Global Viewer (GV) is a set of Web pages (HTML, XML, JS) and
graphics that are loaded into the memory of an IPL. These pages
provide an interface for controlling devices attached to the IPL.
They communicate with the event scripts running on the IPL,
and the event scripts issue commands and queries. This
communication between the Web pages and the event scripts
occurs through predetermined memory locations in the IPL. The
GV is initially created by the Global Viewer Configurator
(GVC); however, it is possible to edit the GV HTML, XML, and
JavaScript files outside of the GVC. This edited GV is called a
"hard-coded" or manually generated GV.
Global Viewer Configurator (GVC) is a Windows-based
program that, based on user input, creates a Global Viewer
(GV). The GVC requests system information such as which
devices you have and your current list of IP addresses. With this
information, GVC creates a GV for your specific devices. The
GVC also compiles the event scripts and loads the GV and event
scripts onto the box. When using the GVC, the user must specify
the port number for each device (to be controlled, attached
devices must be on that port). In order for multiple IPL devices
to appear in the same GV, all the devices must be configured at
the same time using the GVC.
HTTP is an acronym for the HyperText Transfer Protocol
(HTTP), a Web protocol based on TCP/IP, that is used to fetch
HyperText objects from remote Web pages.
Hysteresis (deadband) is the lag that exists between the
responding parameter and the changing parameter.
Internet Protocol (IP) is the protocol or standard used to send
information from one computer to another on the Internet.
IP address is a unique, 32-bit binary number (12 digit decimal
number, xxx.xxx.xxx.xxx) that identifies each sender and each
receiver of information connected to a LAN, WAN, or the
Internet. IP addresses can be static (see static IP) or dynamic
(see DHCP).
IP net mask is a 32-bit binary number (12 digit decimal number,
xxx.xxx.xxx.xxx) used on subnets (smaller, local networks) to
help the router determine which network traffic gets routed
internally to local computers and which network traffic goes out
on the rest of the network or the Internet.
Media Access Control (MAC) Address is a unique hardware
number given to devices that connect to a network such as the
Internet. When your computer or networking device (router,
hub, interface, etc.) is connected to a LAN or the Internet, a table
(see ARP) relates the device's IP address to its corresponding
physical (MAC) address on the LAN.
IPL T SF24 and IPL T SFI244 • Glossary B-3