MERLIN LEGEND Communications System Release 7.0
System Programming
555-670-111
Issue 1
April 1999
Glossary
GL-28
U
Telephone Power
Supply Unit
Equipment that provides power to an individual telephone.
Terminal Adapter
See
.
Tie Trunk
Private trunk directly connecting two telephone switches.
Timed Flash
See
.
Tip/Ring
Contacts and associated conductors of a
single-line
telephone
plug or jack.
Touch-Tone
Receiver
See
T/R
See
.
Trunk
Telecommunications path between the communications
system and the telephone company
central office
or
another switch. Often used synonymously with
line
.
Trunk Jack
See
.
Trunk Pool
See
.
TSAPI
Telephony Services Application Programming Interface
.
Application programming interface that allows computer
telephony applications to be used. TSAPI is supported by
the MERLIN LEGEND Communications System, Release
5.0 and later. See also
and
.
TTR
Touch-Tone Receiver
. Device used to decode
DTMF
touch-tones dialed from
single-line
or
Remote Access
telephones.
UDP
Uniform Dial Plan
. Composed of the
local dial plan
and
non-local dial plan
. A dial plan that allows a caller at any
extension
in a
private network
to dial the same number of
digits to reach any other extension in the private network,
even if the originating extension is physically connected to
one communications system and the terminating extension
is physically connected to a different communications
system.
Unambiguous
Numbering
Practice of numbering of extension ranges, remote access
codes, or other system components to avoid routing
conflicts in network or local calling. For example, Extension
441 is unique when compared to Extension 4410; however,
this is ambiguous, because the system routes as soon as it
matches the digits sent for a call with the digits in a
local
dial
plan or in a
non-local dial plan
extension range. When
a caller dials
4410
, therefore, the system routes the call to
Extension 441 without considering the last dialed digit.
Uniform Dial Plan
See
.
