Lucent Technologies 555-661-150 manual Tsapi, Ttr, Udp

MERLIN LEGEND Communications System Release 6.1		Issue 1
Network Reference 555-661-150		August 1998
Glossary
		Page GL-27
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.
trunk pool	See pool.
TSAPI	Telephony Services Application Programming Interface.
	An application programming interface that allows computer
	telephony applications to be used. TSAPI is supported by
	the MERLIN LEGEND Communications System Release
	5.0. See also TAPI, CTI.
TTR	(touch-tone receiver) Device used to decode DTMF touch-
	tones dialed from single-lineor Remote Access telephones.

U

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	The practice of numbering of extension ranges, remote
numbering	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
	it is ambiguous, because a system routes as soon as it
	matches the digits sent for a call with the digits in a local
	plan or in a non-local dial plan extension range. When a
	caller dials 4410, a system routes the call to Extension 441
	immediately, without considering the last dialed digit.
Uniform Dial Plan	See UDP.
uninterruptible	See UPS.
power supply
unit load	Measure of the power load drain of a module, telephone, or
	adjunct.
unmonitored	An extension for which no CTI application is receiving call
extension	information. See also CTI link and monitored extension.
unrestricted data	Unrestricted data channels (also called clear data
channel	channels) allow the transmission of occurrences of more
	than seven contiguous zero bits. If an unrestricted data
	channel is requested and only restricted channels are
	available, the call will be rejected. See also restricted data
	channel.