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3.12. Glossary of Terms
Term
Definition
DTMF
Dual Tone Multiple Frequency tones. The numeric keys 0 to 9, and * and # will
generate different DTMF tones when pressed during conversation. These are
used to access voice mail, paging and Home banking services.
GSM
Global System for Mobile communications. The name given to the advanced
digital technology that the telephone uses.
Home network
The GSM network on which subscription details are held.
Hot Key Dial
Hot Key Dial allows quick access to numbers stored in the Phonebook of Service
Dial Number list. The source of the Hot Key Dial may be defined by the user or
preprogrammed by the Service Provide. It is most likely to be preprogrammed to
the Service Dial Numbers by the Service Provider.
Phone Lock code
Used for security of the telephone.
Message Centre
Where messages are sent before they are forwarded on to their destination. The
Message Centre telephone number may be programmed into the SIM or
supplied by the service provider.
Network operator
The organization responsible for operating a GSM network.
Password
Used for the control of the call bar function. Supplied by the service provider.
PIN
Personal Identification Number used for SIM security. Supplied by the service
provider.
PIN2
Personal Identification Number used for the control of Fixed Dial Memory and
call charge metering.
Supplied by the service provider.
PUK/ PUK2
PIN/PIN2 Unblocking Key. Used to unblock the PIN/PIN2. Supplied by the
service provider.
Registration
The act of locking on to a GSM network. This is usually performed automatically
by the telephone.
Roaming
The ability to use the telephone on networks other than the Home network.
Service Dial Numbers Service Dial Numbers are predefined numbers that allow the user to access a
set of special services provided by the Service Provider. For example billing
information or access to Voice Mail.
Service provider
The organization responsible for providing access to the GSM network.
SIM
Subscriber Identification Module. A small smart-card which stores unique
subscriber and user-entered information such as Phone Book, Fixed Dial
Memory and short messages. Supplied by the service provider.
Supplementary
Service
Network-controlled GSM functions supported by the telephone. Supplementary
services may only be available on a subscription bases.
Wild numbers
Spaces in a stored telephone number. When the telephone number is recalled
pressing a numeric key will fill in a space. This can be used to restrict dialing to a
specific area.
