Lucent Technologies 555-661-150 manual Tapi

MERLIN LEGEND Communications System Release 6.1	Issue 1
Network Reference 555-661-150	August 1998
Glossary
	Page GL-26

T

T1	Type of digital transmission facility that in North America
	transmits at the DS1 rate of 1.544 Mbps.
T1-emulated data	A T1 tie trunk programmed for S56DATA for use by data
	calls at speeds up to 56 kbps. These trunks may be used
	for tandem and non-tandem operation.
T1-emulated voice	A T1 tie trunk programmed for Tie-PBX or Tie-Toll for use
	by voice calls.
T1 Switched 56	T1 digital data transmission over the public network or over
service	a private network at 56 kbps. See Switched 56 service.
tandem switching	The capability of private network communications systems
	that allows them to direct outside calls from one facility to
	another facility, rather than just to an extension. Calls may
	be sent, for example, from a PSTN facility to a tandem
	trunk or vice versa.
tandem trunk	An private outside facility (as opposed to an inside system
	line) that connects two communications systems in a
	private network and can carry calls to another outside
	facility through tandem switching. The trunk is not
	connected to the PSTN.
tandem tie trunk	A tandem trunk that is an analog delay-start tie trunk,
	providing a single line/trunk per facility and allowing analog
	transmission of voice and low-speed data. Or a T1 facility
	offering 24 channels on emulated tie trunks and
	programmed for voice or data
tandem PRI trunk	(tandem Primary Rate Interface trunk) A private network
	trunk.
TAPI	Telephony Application Programming Interface. An
	application programming interface that allows computer
	telephony applications to be used. TAPI is not yet
	supported by the MERLIN LEGEND Communications
	System. See also TAPI, CTI
telephone power	Equipment that provides power to an individual telephone.
supply unit
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	See TTR.
receiver
T/R	See tip/ring.