108 Glossary
improves the coverage offered by your network operator. It also offers you
enhanced international roaming, thanks to the additional networks now availa-
ble when you are out travelling.
The switching between the two systems is done automatically and seamlessly,
which means that you can use your phone without ever having to consider
which system is best at the time. This is taken care of by the networks. How-
ever, you should note that the functions offered and the network coverage dif-
fer depending on your choice of operator and/or subscription.
Enter
is used for keying in letters or numbers from the keypad.
Fixed Dialling Numbers
enables you to allow only numbers beginning with certain pre-defined num-
bers to be dialled from your mobile phone. The service is activated by PIN2.
To use this service, it must be supported by your network.
Fixed Incoming Calls
enables you to allow only numbers beginning with certain pre-defined num-
bers to be received on your mobile phone. The service is activated by PIN2.
To use this service, it must be supported by your network.
Full Duplex
in handsfree equipment means that both parties on the phone can talk at the
same time. The opposite is simplex mode when one party talks and the other
must wait for his/her turn.
Fax Class
Standards for fax transmission are set as classes. Class I and II allow data
transfer speeds of between 2400 to 9600 bps.
Group calls
Group calls allows you to call all members of a specified group with one sin-
gle call. Group calls requires a subscription which supports GSM Pro.
GSM 900
GSM is the world's most widely used digital network, now operating in over
100 countries around the world, particularly in Europe and Asia-Pacific.
The Global System for Mobile Communications is the most widely used dig-
ital mobile phone system. The GSM systems family also includes 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.
