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Glossary
182
EMS (Enhanced Message Service)
Network service sending and receiving messages
that include images, sounds and animations to and
from another user without having to speak to the
correspondent.
GPRS (General Packet Radio Service)
New non-voice value-added service that allows
information to be sent and received across a mobile
telephone network. GPRS guaranties continuous
connection to the Internet for mobile phone and
computer users. It is based on the Global System
for Mobile Communication (GSM) circuit-switched
cellular phone connections and the Short Message
Service (SMS).
GSM (Global System for Mobile
Communication)
International standard for cellular communication,
guaranteeing compatibility between the various
network operators. GSM covers most European
countries and many other parts of the world.
IrDA (Infrared Data Association)
A standard defined by the IrDA consortium. It
specifies a way to wirelessly transfer data via
infrared radiation. The IrDA specifications include
standards for both the physical devices and the
protocols they use to communicate with each other.
Glossary
183
MMS (Multimedia Message Service)
A message service for the mobile environment,
standardized by the WAP Forum and the 3rd
Generation Partnership Program (3GPP). For phone
users, MMS is similar to Short Message Service
(SMS)-it provides automatic, immediate delivery of
user-created content from phone to phone. The
message addressing used is primarily phone
numbers, thus the traffic goes from phone to
phone. MMS also provides support for e-mail
addressing, so that messages can also be sent by
e-mail. In addition to the text content of SMS, MMS
messages can contain still images, voice or audio
clips, and later also video clips and presentation
information.
Multiparty Calling
Ability to establish a conference call involving up to
five additional parties.
PIN (Personal Identification Number)
Security code that protects the phone/SIM against
unauthorised use. The PIN is supplied by the
service provider with the SIM card. It may be a four
to eight-digit number and can be changed, as
required.
PUK (PIN Unblocking Key)
Security code used to unlock the phone when an
incorrect PIN has been entered three times in
succession. The eight-digit number is supplied by
the service provider with the SIM card.
Roaming
Use of your phone when you are outside your home
area (when travelling for example).