Instruction manual

Glossary
switchhook flash
Momentary (320 ms to 1 second) on-hook signal used as a
control; may be directed to the control unit
or to a host
switch outside the system. Also called “Recall” or “timed
flash.”
System Access
buttons
See SA buttons .
system date and
time
Date and time that appear on MLX display telephones and
SMDR reports.
system
programming
Programming of system functions and features that affect
most users, performed from an MLX-20L telephone or a
computer using
SPM . See also extension programming
and centralized telephone programming.
System
Programming and
Maintenance
See
SPM .
system
renumbering
Procedure used to change the numbers assigned to
telephones, adjuncts,
calling group s, paging groups, park
zones,
Remote Access , and lines/trunks.
T
T1
Type of digital transmission facility that in North America
transmits at the
DS1 rate of 1.544 Mbps.
T1 Switched 56
service
T1 digital data transmission over the public network at 56
kbps .
telephone power
supply unit
Equipment that provides power to an individual telephone.
terminal adapter
See
ISDN terminal adapter .
tie trunk
Private trunk directly connecting two telephone switches.
timed flash
See
switchhook flash .
tip/ring
Contacts and associated conductors of a
single-line
telephone
plug or jack.
touch-tone receiver
See
TTR .
T/R
See
tip/ring .
trunk
Telecommunications path between the communications
system and the telephone company central office ( CO ) or
another switch. Often used synonymously with
line .
trunk jack
See
line/trunk jack .
GL–20 System Manager's Guide