IPL T CR48 • Glossary
Glossary
B-2
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.
Contact closure refers to an encapsulated switch containing
two metal wires that serve as the contact points. When these
contact points meet, it creates a complete circuit (e.g., ports 1-4
to ground on the IPL T CR48).
Custom Web page is any le 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 GlobalViewer
®
(GV) or Global Congurator (GC).
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 t 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 Conguration Protocol (DHCP),
which is 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 Congurator (GC) 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 Congurator 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.
