mobile technology glossary

Here are the results for the letter d

D-AMPS

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

D/A

Digital to Analogue conversion

DAC

Digital to Analogue Convertor

DAMA

Demand Assigned Multiple Access

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

DB

Dummy Burst; transmitted as a filler in unused timeslots of the carrier

DCA

Dynamic Channel Assignment

DCCH

Dedicated Control Channels; responsible for roaming, handovers, encryption etc. (See SDCCH, SACCH and FACCH)

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

DPCM

Differential Pulse Code Modulation

DPSK

Digital Phase Shift Keying

DQPSK

Digital Quadrature Phase Shift Keying

DS-CDMA

Direct Sequence CDMA

DSP

Digital Signal Processing

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 including voice mail systems and voice messaging

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

Dual band

Mobile phones which support transmission and reception of calls on the 900MHz and 1800MHz bands with seamless handover between the two frequency bands

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)