Ericsson LBI-39076B - Manual (Page 55)

GLOSSARY LBI-39076B
55
GLOSSARY
2-Wire Audio Line.......................................................A 2-Wire audio line uses a single audio pair for passing audio signals in
both directions.
4-Wire Audio Line.......................................................A 4-Wire audio line uses separate audio pairs for passing audio signals
in both directions; one audio pair for each direction.
CDR.............................................................................Call Detail Record [ELI]
Channel-Connected GTI ..............................................The Channel-connected GTI is the specific GTI unit connected to the
EDACS repeater channel involved in the interconnect call being
described.
DID ..............................................................................Direct Inward Dialing - A feature which allows callers to dial from the
public network straight to a wanted extension on a PABX without
intervention by an operator.
DIP Switches ...............................................................Dual In-Line Package Switches - DIP switches are commonly packaged
in banks of eight, but can be more or less.
DSP..............................................................................Digital Signal Processor
DTMF ..........................................................................Dual-Tone Multi-Frequency - DTMF is a signaling method using set
combinations of two specific voice-band frequencies to represent
characters on a keypad (typically includes the numbers 0 through 9).
One frequency represents the row number on keypad; the second
frequency represents the column number.
E-Lead .........................................................................The E-Lead is a separate signaling wire associated with some 2-Wire or
4-Wire audio lines, and is used to signal an incoming call from the
public telephone network. Signaling is usually detected by the presence
or absence of ground or -48 Vdc.
E&M Signaling ............................................................E&M signaling uses separate leads (separate from the 2-Wire or 4-Wire
audio lines) for detecting incoming calls (E-Lead), and sending off-
hook and on-hook signals (M-Lead).
EDACS ........................................................................Enhanced Digital Access Communications System
EDACS Interface panel ...............................................The panel at the top rear of most EDACS equipment cabinets
containing modules that allow quick and easy interconnection of all
audio and control functions in an EDACS installation.
ELI...............................................................................Enhanced Local Interconnect - a telephone interface system for use with
EDACS repeater channels, under the direction of the Site Controller
computer.
ELI Interface Module ..................................................The ELI Interface module (used in the EDACS Interface panel at the
top of each cabinet containing GTI units) is used to consolidate the
telephone line connections for 6 GTI units into a single 25-pair IDC
telco connector.
GETC...........................................................................A GETC is a trunking card that can be configured for many
applications. The GETC mentioned in this manual is the Station GETC.
One Station GETC must be connected to each repeater used in an
EDACS installation to permit trunking of that radio channel.
GID ..............................................................................Group ID - a unique number used by a group of radios to work with an
EDACS system.