Extron Electronics IPL T CR48 - Manual (Page 44)

GlobalViewer (GV) — A set of Web pages (HTML, XML, JS) and graphics that are loaded
into the memory of an IPL T CR48. These pages provide an interface for control of devices
attached to the IPL T CR48. They communicate with the event scripts running on the unit,
and the event scripts issue the commands and queries. This communication between the
Web pages and the event scripts occurs through predetermined memory locations in the
IPL T CR48. GV is initially created by GC; however, it is possible to edit the GV HTML, XML,
and JavaScript files outside of Global Configurator. This edited GV is called “hard-coded” or
manually generated GV.
HTTP — HyperText Transfer Protocol (HTTP), which is a Web protocol based on TCP/IP, that is
used to fetch HyperText objects from remote Web pages.
Internet Protocol (IP) — The protocol or standard used to send information from one
computer to another on the Internet.
IP address — 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 Netmask — 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 Internet.
Media Access Control (MAC) Address — A unique hardware number given to devices
that connect to the Internet. When your computer or networking device (such as a router,
hub, or interface) is connected to the Internet, a table (see “ARP”) relates the IP address of
the device to its corresponding physical (MAC) address on the LAN.
Pass-through — Allows control systems to work with the IPL T CR48 and provides a link
between two ports.
Ping — A utility that tests network connections. It is used to determine if the host has an
operating connection and is able to exchange information with another host.
Port number — A preassigned address within a server that provides a direct route from the
application to the Transport layer or from the Transport layer to the application of a TCP/IP
system.
Relay — An electromechanical device that opens or closes electrical contacts when
energized by an isolated electrical coil circuit.
Static IP — An IP address that has been specifically (instead of dynamically [see “DHCP”])
assigned to a device or system in a network configuration. This type of address requires
manual configuration of the actual network device or system and can only be changed
manually or by enabling DHCP.
Transmission Control Protocol/Internet Protocol (TCP/IP) — The communication
protocol (language) of the Internet. Computers and devices with direct access to the
Internet are provided with a copy of the TCP/IP program to allow them to send and receive
information in an understandable form.
Telnet — A utility available on most PCs that allows the computer system to communicate
with one of its remote users or clients. A user who wishes to access a remote system initiates
a Telnet session, using the address of the remote client. The user may be prompted to
provide a user name and password if the client is set up to require them.
URL encoding — Allows you to send information and commands to the unit to change its
configuration or provide you with feedback.
IPL T CR48 • Glossary 38