IP address
A unique, 32-bit binary number (12 digit decimal number —
nnn.nnn.nnn.nnn
) based on
version 4 of the internet protocol (IPv4) 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/subnet mask
A 32-bit binary number (12 digit decimal number —
nnn.nnn.nnn.nnn
) 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.
M
Media Access Control (MAC) Address
A unique hardware number given to devices that connect to the Internet. When your
computer or networking device (router, hub, interface, and so on) is connected to the
Internet, a table relates the device IP address to its corresponding physical (MAC) address on
the LAN.
P
Ping (Packet Internet Groper)
A command that is used to test connectivity between IP devices. The Internet Control
Message Protocol (ICMP) echoes Ethernet packets to determine whether a network device is
active and what the bidirectional delay is in communicating with it.
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.
Power level reference threshold
(See
Reference threshold
.)
R
Reference threshold
The point at which the power level (full or standby) at which a device is operating changes.
This threshold is recognized by the IPL T PCS4, which can be configured to sound an alarm
whenever a connected device passes this threshold.
Receptacle
A connector on a power supply that is equipped to receive a plug. The IPL T PCS4 has four
receptacles into which devices can be plugged, enabling the PCS4 to monitor and schedule
power for the connected devices.
S
SIS (Simple Instruction Set) commands
A set of commands developed by Extron that allows control of the PCS4 via the keyboard
of a PC with an Ethernet connection. A minimal number of characters are used in these
commands and responses.
Standby reference threshold
The point at which a device starts to operate at standby power.
IPL T PCS4 • Glossary
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