Ericsson LBI-39076B system manual Presence of a DC loop current between one of the two wires

LBI-39076B	GLOSSARY
	GLOSSARY (CONT.)
Ground-Start Signaling	Ground-Start signaling is used to send the local off-hook and on-hook
	signals to the public telephone network. Off-hook is detected by the
	presence of a DC loop current between one of the two wires of the 2-
	Wire audio line and ground.
GTI Unit	Global Telephone Interconnect Unit - the interface for one EDACS
	repeater channel, and one telephone line, in a single unit.
GTI Configurator	The GTI Configurator is the office PC used to run the GTI Configurator
	software.
GTI Configurator Software	..........................................The GTI Configurator software is a PC-based, menu-driven program
	that allows the system operator to set up the GTI(s) and optional IAM,
	retrieve GTI call records, and monitor the system activity via a monitor
	screen.
GTI Interface Board	The GTI Interface board is the interface between the Site Controller
	computer and the Enhanced Local Interconnect (ELI) system. The GTI
	Interface board is added to one GTI, making it the Master GTI.
IAM	Interconnect Accounting Manager - The IAM is a microprocessor-
	based, call-detail buffer containing two megabytes of battery-backed
	RAM to provide storage for up to 60,000 interconnect calls.
Inbound Call	An inbound call is a call from a telephone to a radio. This is also
	referred to as a telephone-originated call.
LED	Light-Emitting Diode
LID	Logical ID - a unique number used by a radio to work with an EDACS
	system.
Line-Connected GTI	The line-connected GTI is the specific GTI unit connected to the
	telephone line involved in the interconnect call being described.
Loop-Start Signaling	Loop-Start signaling is used to send the local off-hook and on-hook
	signals to the public telephone network. Off-hook is detected by the
	presence of a DC loop current between the two wires of the 2-Wire
	audio line.
M-Lead	The M-Lead is a separate signaling wire associated with some 2-Wire
	or 4-Wire audio lines, and is used to send the local off-hook and on-
	hook signals to the public telephone network. Signaling is usually by
	application or removal of ground or -48 Vdc.
Master GTI	The Master GTI is the specific GTI that has had the GTI Interface card
	added.
PABX	Private Automatic Branch Exchange
PCM	Pulse Coded Modulation
PCM / Data Bus	The PCM / Data Bus is used to connect the optional IAM (if present),
	Master GTI, and all the standard GTI units together. It is actually made
	up of an 8-bit parallel PCM Data bus, a serial Console Data bus, a serial
	Subscriber Data bus, and a serial Repeater Data bus.
PSTN	Public Service Telephone Network

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