Deck
A collection of WML cards.
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DECT (Digital Enhanced
Cordless Telecommunications)
A standard for cordless telephony.
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DTD
Document Type Definition. A DTD defines the
names and contents of all elements that are permissible in a certain
document. A DTD is used to specify XML document structure.
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Dual band
Dual band mobile phones can work on networks
operating different frequency bands. Often urban areas operate on 1800,
while suburbs use the 900-band. This is especially useful if you travel
abroad. Some phones are able to switch between GSM 900,1800,1900
(tri-band) allowing you full coverage in Europe, America and Asia.
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EIR
Equipment Identity Register
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ESN
Electronic Serial Number
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FDMA
Frequency Division Multiple Access
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GHz
Gigaherz - A frequency measurement. One
hertz equals one cycle per second. GHz = One Billion hertz.
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GMSC
Gateway Mobile Switching Center
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GPRS (General Packet Radio
Service)
A packet-linked technology that may enable
high-speed (up to 115 kilobit per second) access to wireless Internet in a
GSM network. GPRS is IP-based, and may allow users to be online 24 hours.
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GPS
Global Position System. Based on US defence
satellite system, enables tracking of individuals. This technology may
prove helpful when navigating a car in the city, or help emergency
rescue-team to locate the person in need of help.
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GSM
Global System For Mobile Communication
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GSM (Global System for
Mobile Communications)
The world’s most widely used mobile
system. Used on the 900 MHz and 1800 MHz frequencies in Europe, Asia and
Australia, and the MHz 1900 frequency in America.
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HDML
Handheld Markup Language. Invented by
phone.com, predecessor to WML.
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HLR
Home Location Register
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HSCSD
(High Speed Circuit Switched Data). A
circuit-linked technology for higher transmission speed by combining
several GSM channels at the same time. This may allow speeds up to 58 bps,
far faster than original GSM (9.6bps). For upload HSCSD is limited to half
the speed. This technology is the predecessor of GPRS, which may deliver
up to 115kbs.
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Hz
Hertz - radio frequency measurement (one
hertz = one cycle per second).
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IEMI
International Equipment Mobile Identity
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IMEI
The IMEI (International Mobile Equipment
Identity)is a 15 digit Code used to identify the GSM/DCS/PCS phone to the
network.
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IWF
Interworking Function (Modem)
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