Extron Electronics IPL T CR48 - Manual (Page 43)

Glossary
This section provides definitions of terms related to the IPL T CR48.
10/100Base-T — Ethernet that uses Unshielded Twisted Pair (such as UTP - CAT 5) 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) — ARP is a protocol which assigns an IP address to a
device based on the MAC or physical machine address of the device.
Contact Closure — An encapsulated switch containing two metal wires that serve as the
contact points. When these contact points meet, it creates a complete circuit (for example,
ports 1 through 4 to ground on the IPL T CR48).
Custom Web page — Any file that can be loaded into an IPL T CR48 and served by the
unit’s internal Web server. A custom Web page can provide control of devices attached to
the IPL T CR48 without use of the GlobalViewer
® (GV) or Global Configurator (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 fit on the IPL T CR48, 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 T CR48
functions like a small computer with a Web server — you can use it for various Web tasks.
DHCP — Dynamic Host Configuration Protocol (DHCP), which is a standardized
communications protocol that enables network administrators to locally and automatically
manage the assignment of IP addresses in a network for an organization.
Driver — A GC compatible package. It includes the event script that controls devices.
Ethernet — 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 — A program that runs on an IPL T CR48 controller, 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). GC performs this compilation. The compiled
result is loaded onto the IPL T CR48. 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
unit.
Global Configurator (GC) — A Windows ® program that, based on user input, creates a
GlobalViewer (GV). GC requests system information such as which devices you have and
your current list of IP addresses. With this information, GC creates a GlobalViewer for your
specific devices. GC also compiles the event scripts and loads the GV and event scripts onto
the box. When using GC, you must specify the port number for each device (for attached
devices to be controlled, they must be on that port). In order for multiple IP Link
® units to
appear in the same GV, all the units must be configured at the same time, using GC.
IPL T CR48 • Glossary 37