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
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
DB
Dummy Burst; transmitted as a filler in unused timeslots of the carrier
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)
The Consumer Mobile Glossary
Data capable
Mobile phones which have the capability to enable transmission of data from a laptop computer or PDA via the phone
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
