User's Manual Part 2

Terms and definitions 181
Preliminary
GSM 900
The GSM system family includes GSM 900, GSM 1800 and
GSM 1900. There are different phases of roll-out for the GSM
system and GSM phones are either phase 1 or phase 2
compliant.
GSM 1800
Also known as DCS 1800 or PCN, this is a GSM digital network
working on a frequency of 1800 MHz. It is used in Europe and
Asia-Pacific.
GSM 1900
Also known as PCS. Refers to a GSM system running in the
1900 MHz band. Used in the USA and Canada, for instance.
HSCSD
High-Speed Circuit-Switched Data (HSCSD) is circuit-switched
wireless data transmission for mobile users at data rates up to
38.4 kbps, four times faster than the standard data rates of the
Global System for Mobile (GSM) communication standard in
1999.
HTML
Hypertext Markup Language is the set of markup symbols or
codes inserted in a file intended for display on a World Wide
Web browser page. The markup tells the web browser how to
displayawebpage'swordsandimages.
HTTP
HyperText Transfer Protocol. The communications protocol
used to connect to servers on the World Wide Web. Its primary
function is to establish a connection with a Web server and
transmit HTML pages to the client browser.
IMAP4
Internet Message Access Protocol (the latest version is IMAP4)
is a standard client/server protocol for accessing e-mail from
your local server. The e-mail is received and held for you by
your Internet server. You (or your client e-mail receiver) can
view just the heading and the sender of the letter and then decide
whether to download the mail.
IrDA
The Infrared Data Association. is dedicated to developing
standards for wireless, infrared transmission systems between
devices. With IrDA ports, a device such as your smartphone can
exchange data with other devices without a cable connection.
IrDA requires line-of-sight transmission.
ISDN
Integrated Services Digital Network. Communication protocol
offered by telephone companies that permits telephone networks
to carry data, voice, and other source traffic. It can provide
circuit-switched data connections in multiples of 64 kbps.
P800_UM.book Page 181 Wednesday, August 28, 2002 4:19 PM