Issue 2 April 1996 GL-5

MDF	Main distribution frame. A wiring arrangement that connects the outside
	telephone lines to the internal lines. A main distribution frame can also
	carry protective devices and function as a central testing point.memory
	A device into which information can be copied and held and from which
	information can be obtained at a later time.
MIB	Management information base. A database of network management
	information. In this book, MIB refers to the total MIB that consists of two
	groups from MIB-II (an industry standard MIB) and all of the G3-MIB
	developed specifically for DEFINITY G3 SNMP.
message line	A line on G3-MA screens that displays informational messages. The line
	is located near the bottom of the screen, directly above the command
	line.
modem	A device that converts digital data signals to analog signals for
	transmission over telephone circuits. The analog signals are converted
	back to the original digital signals by another modem at the other end of
	the circuit.

network	See NMS.
management
system
nondestruc-	An installation where the operating system is replaced but user files
tive	remain untouched.
installation
NMS	Network management system. A comprehensive system of hardware and
	software used to monitor, control, and manage a communications
	network. An NMS usually consists of testing devices, CRT displays and
	printers, patch panels and circuitry for the diagnosis and reconfiguration
	of channels.

AT&T G3 manual Issue 2 April 1996 GL-5