AT&T 2400 - Manual (Page 149)

Glossary
Issue 2 December 1995 GL-9
DSU
See data service unit .
DTE
See data terminal equipment .
DTR
See data terminal ready .
dual in-line package (DIP) switch
A very small switch, usually attached to a printed circuit card, in which there are only two settings:
on or off (or 0 or 1). DIP switches are used to configure the card in a semipermanent way.
E
electrostatic discharge (ESD)
Discharge of a static charge on a surface or body through a conductive path to ground. An ESD
can be damaging to integrated circuits.
enabled/disabled
The state of a hardware device that indicates whether the INTUITY system can use it. Devices
must be equipped before they can be enabled (made active). See also
equipped/unequip ped .
enhanced call transfer
An INTUITY AUDIX feature that allows compatible switches to transmit messages digitally over
the BX.25 (data) link. This feature is used for quick call transfers and requires a fully integrated
digital switch. Callers can only transfer to other extensions in the switch dial plan.
enhanced serial data interface
A software- and hardware-controlled method used to store data on magnetic peripherals.
equipped/unequipped
The state of a networking channel that indicates whether INTUITY software has recognized it.
Devices must be equipped before they can be enabled (made active). See also
enabled/dis-
abled .
error message
A message on the screen indicating that something is wrong and possibly suggesting how to cor-
rect it.
errors
Problems detected by the system during operation and recorded in the maintenance log. Errors
can produce an alarm if they exceed a threshold.
escape to attendant
An INTUITY AUDIX feature that allows a subscriber with the call answer feature to have a personal
attendant or operator administered to potentially pick up an unanswered call. A system-wide
extension could also be used to send callers to a live agent.
ESD
See electrostatic discharge .
events
Informational messages about the system’s activities. For example, an event is logged when the
system is rebooted. Events may or may not be related to errors and alarms.