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72 Glossary
Glossary
Advice of Charge
(or AoC) enables you to monitor the cost of calls made from your
mobile phone. Details of the last call and total calls made are shown
in the phone display.
Alternate Line Service
(or ALS) enables you to have two lines and two different phone num-
bers on one subscription for your mobile phone. This makes it possi-
ble to have separate numbers for business and personal calls. To use
this service, it must be supported by your network.
Area Information
(or AI) is a service that allows you to receive messages about pre-set
topics i.e. weather forecasts, road reports, etc. To use this service, it
must be supported by your network.
Call Barring
enables you to restrict or bar certain or all types of calls to and from
your mobile phone, i.e. outgoing calls, outgoing international calls,
incoming calls. Barring is activated with a personal code. To use this
service, it must be supported by your network.
Calling Line Identification
(or CLI) shows the number of the person calling you in your mobile
phone display. You can then make an informed choice as to whether
or not to take the call. Bear in mind that not all numbers can be dis-
played. To use this service, it must be supported by your network.
Divert
enables you to forward calls to another number, for example your
voice mail or home phone.
DTMF or Touch Tone
Dual Tone Multi Frequency signal – codes sent as tone signals. Used
for telephone banking, for accessing an answering machine, etc.
Dual Band GSM 900/1800
A dual band phone allows you to use your phone on two different
kinds of networks – the GSM 900 and the GSM 1800 (also called
PCN or DCS 1800) systems.