Nortel Networks 9150 - Manual (Page 525)

Remote Gateway 9150 Installation and Administration Guide 495
January 2005 Glossary
idle timer
Identifies the maximum length of time during which an ISDN connection should
remain idle before it can be closed. Idle means that a voice connection does not
exist, and buttons are not being pressed on the digital telephone.
input/output
Refers to any operation, program, or device that enters data into a computer or
extracts data from a computer.
I/O
Refer to input/output.
IP
Internet Protocol. The protocol within TCP/IP that governs the breakup of data
messages into packets, the routing of the packets from sender to destination
network, and the reassembly of the packets into the original data messages at the
destination.
IP address
Internet Protocol address. An identifier for a computer or device on a TCP/IP
network. Networks use the TCP/IP protocol to route messages based on the IP
address of the destination. The format of an IP address is a 32-bit numeric
address written as four numbers separated by periods. Each number can be
0–255. For example, 1.160.10.240 can be an IP address.
ISDN
Integrated Services Digital Network. A worldwide digital communication
protocol that permits telephone networks to carry data, voice, and other source
material. There are two kinds of ISDN lines—Primary Rate Interface (PRI) and
Basic Rate Interface (BRI). Refer also to BRI.
J
jumper
A metal bridge that closes an electrical circuit. Typically, a jumper consists of a
plastic plug that fits over a pair of protruding pins. Jumpers are sometimes used
to configure expansion boards. By placing a jumper plug over a different set of
pins, you can change a board’s parameters.