D

D/A - Digital to Analogue conversion

DAC - Digital to Analogue Convertor

DAMA - Demand Assigned Multiple Access

D-AMPS - Digital AMPS, a US wireless standard also known as IS-136

DAN - DECT Access Node

Data capable:
Mobile phones which have the capability to enable transmission of data from a laptop computer or PDA via the phone

Datacable : interface for conecting a mobile fone to pc

db - decibel (unit if sound)
DB - Dummy Burst; transmitted as a filler in unused timeslots of the carrier
DCT /3,4 - digital core technology

DCT/L - digital core technology linda


DCCH - Digital Control Channel
DTCH - Digital Traffic Channel
DTX - Discontinous Transmission Exchange

DCA - Dynamic Channel Assignment

DCCH - Dedicated Control Channels
( responsible for roaming, handovers, encryption etc)

DCE - Data Communications Equipment

DCH - Data Clearing House

DCPSK - Differentially Coherent Phase Shift Keying

DCS1800 - Digital Cellular System at 1800MHz, now known as GSM1800


DECT - Digitally Enhanced Cordless Telecommunications system, a second generation digital cordless technology standardised by ETSI

DEPSK - Differential Encoded Phase Shift Keying

DES - Digital Encryption Standard



DFSK - Double Frequency Shift Keying


Digital:
a method of representing information as numbers with discrete values; usually expressed as a sequence of bits
Digital a method of encoding a transmission that involves translating information (in the case of digital phones the information would be a voice conversation) into a series of 0’s and 1’s. Digital communications technology offers cleaner calls without the static and distortion that is common with analog phones. The majority of new handsets sold today are digital rather than analog technology. 

DPCM - Differential Pulse Code Modulation

DPSK - Digital Phase Shift Keying

DQPSK - Digital Quadrature Phase Shift Keying

DS-CDMA - Direct Sequence CDMA

DSP - Digital Signal Processor
Digital Signal Processing refers to manipulating analog information, such as sound or photographs that has been converted into a digital form to improve accuracy and reliability of digital communications. 


DSC- Digital Signal Controller 

DSRR - Digital Short Range Radio
( a UK standard for a low power, short range radio system designed for small voice and data networks)

DTE - Data Terminal Equipment

DTMF - Dual Tone MultiFrequency;
(better know as Touch Tone. The tones generated by touching the keys on the phone are used for a variety of purposes )

DTX - Discontinuous Transmission

Dual Band:
The capability of GSM infrastructure elements and handsets to work across both the 900MHz and 1800MHz bands. The capability to seamlessly handover between the two bands offers operators major capacity gains


Duplex:
The wireless technique where one frequency band is used for traffic from the network to the subscriber (the downlink) and another, widely separated, band is used for traffic from the subscriber to the network (the uplink)
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