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6-
Modem
The Modem fulfils the data exchange function between the system and telephone
network. It is a full-duplex asynchronous modem complying with CCITT V22 & V22 bis
recommendations.
The MODEM is connected (through the base) to the telephone network by a removable
cord fitted with a telephone connector which is plugged into the telephone wall socket.
It is equipped with :
• A computerised electronics with built-in application program and module
self-test
• A line interface for connection to the telephone network
• An automatic tone dialling facility
• A connector for plugging in a removable phone cord, fitted with a 6-contacts
connector or adapter plug (depending on the country)
7-
SIM Interfaces
When implemented, access to the optional SIM connectors needs to open the battery
door located at the bottom of the terminal.
Version May 1999
13
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