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C h a p t e r 18
1. 2G - Second Generation wireless communication system. 2G
system supports low quality voice and low-rate packet-data
service. 2G refers to GSM in European countries, and CDMA in
America.
2. 3G - Third Generation wireless communication system. 3G is the
next generation wireless communication system that offers real-
time video streaming services and high-rate packet-data service.
3G is also known as UMTS (Universal Mobile Telephony System).
3. Access point - Access point refers to a point through which
users can connect to the network so that the users can use the
network services.
4. MMS (Multimedia Message Service) - A message service for
the handset environment, that allows videos, pictures, audio
files and text to be sent between phones and dependent on
network provider support, to email addresses
5. Roaming - Use of your phone when you are outside your home
area, when traveling for example.
6. (U)SIM - Universal Subscriber Identity Module. Your (U)SIM is
provided by service provider. It carries the authentication and
service grade data for the service provider as well as user-
specific data such as Contacts and SMS.
Glossary
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