BTS - base station transceiver system

CDMA

CDMA-BSC - code division multiple access - base system controller

CNC - computer numerical controller

CRT (cathode ray tube) - a specialized vacuum tube in which images are produced when an electron beam strikes a phosphorescent surface. Most desktop computer displays make use of CRTs. The CRT in a computer display is similar to the "picture tube" in a television receiver.

DCCR - direct current control rack

DCS/MSC - digital cellular system / mobile switching center

DSL (digital subscriber line) - dedicated, ultra-fast Internet access service

DSLAM (digital subscriber line access multiplexer) -a network device, usually at a telephone company central office, that receives signals from multiple customer digital subscriber line (DSL) connections and puts the signals on a high-speed backbone line using multiplexing techniques. Depending on the product, DSLAM multiplexers connect DSL lines with some combination of asynchronous transfer mode (ATM), frame relay, or Internet Protocol networks. DSLAM enables a phone company to offer business or home users the fastest phone line technology (DSL) with the fastest backbone network technology (ATM).

DSRC-ADI Board - DongAh Elecomm series resonant controller-analog to digital interface board

EMI - electromagnetic interference

ESS - electronic switching system

FLC - fiber loop carrier

FICF - facilities serial interface

HDLC (high-level data link control) - a group of protocol or rules for transmitting data between network points (sometimes called node). In HDLC, data is organized into a unit (called a frame) and sent across a network to a destination that verifies its successful arrival. The HDLC protocol also manages the flow or pacing at which data is sent. HDLC is one of the most commonly used protocols in what is Layer 2 of the industry communication reference model called Open Systems Interconnection (OSI).

HFSN - high frequency snubber

HTFT - high frequency conversion rectifier (HFCR) total fail transfer

HTPS2 Board - High frequency conversion rectifier (HFCR) total power supply board

IMT-2000 (International Mobile Telecommunication for the year 2000) - the International Telecommunication Union's name for the new third generation global standard for mobile telecommunications

IS-95C (Interim Standard)- designation of the American National Standards Institute referring to the accepted industry protocol for code division multiple access

ISO 9000 - a set of international quality management standards and guidelines established by the International Organization for Standardization (ISO). Companies whose products are ISO certified reflect a high quality of consistency and quality.

ISO 9001 - standard for quality assurance in design, development, production, installation and servicing. This certification demonstrates a company's capability for design/development of a product or service, as well as for production, installation and servicing.

Iout -  output current

IWF (interworking function) - LG Electronics product

Key system - the simplest type of equipment-based telephone system: a cost-effective alternative to network-based telephone systems

KEPCO - Korea Electic Power Corporation

MSC - mobile switching center

MTBF - mean time between failures

MR - main rack

PABX - private automatic branch exchange

PBX ( private branch exchange ) - a telephone system within an enterprise that switches calls between enterprise users on local lines while allowing all users to share a certain number of external phone lines. The main purpose of a PBX is to save the cost of requiring a line for each user to the telephone company's central office.

PCB - printed circuit board

PCS (personal communications services) - a two-way, 1900 M Hz digital voice, messaging and data service designed as the second generation of cellular. In PCS systems, calls are handled in streams of digital bits and bytes, resulting in a signal that is noticeably clearer and free from cross talk.

PDP (plasma display panel) - plasma display devices have higher resolution than conventional TV sets, and are capable of displaying full HDTV and DTV signals as well as XGA, SVGA and VGA signals from a computer. These devices are equipped with a high-resolution 1024 x 1024 pixel panel that can display images at true 1080i and 720p HDTV resolution, as well as 480i and 480p HD signals. Monitors are perfectly flat.

PLC - programmable logic controller

PMS - power management system

PRC - product realization center

PVC - permanent virtual connections

RC - radio control / routing control

Repeater - devices that receive a radio signal, amplifies it and retransmits it in a new direction. Used in wireless networks to extend the range of base station signals, thereby expanding coverage more economically than by adding base stations. Typically used for buildings, tunnels or difficult terrain.

RMS - remote monitoring system

rms - root means square

Router - An intelligent device near the edge of the network that forms data packets and selects the most expedient route for data to travel

RS-422 - standard interfaces approved by the Electronic Industries Association (EIA) for connecting serial devices. This standard supports higher data rates and greater immunity to electrical interference than previous standards. RS-422 supports multiple connections.

RS-485 - an Electronics Industries Association standard for multipoint communications. It supports several types of connectors. RS-485 is similar to RS-422 but can support more nodes per line, because it uses lower-impedance drivers and receivers.

SDX - Samsung digital exchange

SMD (surface mount device) -surface mount technology automatically mounts electronic components such as condensers, capacitors or IC-Chips on printed circuit boards. .

Starex^tm - LG brand exchange system for export

TDX - Korean electronic switching system

TDMA (time division multiple access) - a method of digital wireless communications transmission allowing a large number of users to access in sequence a single radio frequency channel without interference by allocating unique time slots to each user within each channel

TMN (telecommunications management network) - next generation network operating technology

Vdc - DC voltage

Vin - input voltage

VMS - voice mailing system

Vout - output voltage

VNPT - Vietnam Posts and Telecommunications Corp.

VR - variable resistor

WCDMA (wideband code-division multiple access) - an ITU standard derived from code-division multiple access (CDMA), is officially known as IMT-2000 direct spread. WCDMA is a third-generation (3G) mobile wireless technology offering much higher data speeds to mobile and portable wireless devices than commonly offered in today's market.

WLL (wireless local loop) - a system that connects subscribers to the public switched telephone network using wireless technology coupled with line interfaces and other circuitry to complete the "last mile" between the customer premise and the exchange equipment.

W-WLL - wide-band wireless local loop

ZVS - zero voltage switching

ZVZCS - zero voltage zero current switching