Product features
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Note: The DC connector’s middle contact has negative (-) polarity and
the outer contact has positive (+) polarity.
Supplementary services
These features are network services. They are special services provided by wire-
less network service providers and differ from one network and country to an-
other. For details, check with the local network service provider.
The Nokia 22 supports the GSM Phase 2+ Supplementary Services
1 Number identification
2 Call offering
3 Call completion
4 In-call handling
5 Call transfer
6 Call restriction
7 High Speed Circuit Switched Data (HSCSD)
8 Security Options
For more specific information about the supplementary services supported by
the terminal, see “ Appendix: Supplementary services” on page 48.
Short Message Service (SMS)
The Nokia 22 supports both Mobile Originated (MO) and Mobile Terminated (MT)
short message services with the help of AT commands.
A PC and the Nokia 22 Data Packet are needed when using the SMS feature.
When an SMS message is received the light indicators 3, 4 and 5 light up and a
tone indicator (--- --- ---) is heard through the telephone set’s receiver.
Note: SMS message received signals are reset when the receiver is lifted
off-hook.
Voice mail
The Nokia 22 supports the GSM network voice mail service. If the network sends
an SMS of received voice mail, the terminal will indicate the received SMS by
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