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When the SOPHO-LAM wants to make an outgoing call, it activates CT107.
The modem detects an active signal on CT108, now there are two possibilities:
-
in CT108.1 mode (Connect Data Set to Line) the convertor modem sets up the
connection with the remote modem;
-
in CT108.2 mode (Data Terminal Ready) the modem waits for dial information (for
example Hayes commands).
• Idle state
In idle state CT107 of the SOPHO-LAM is OFF.
The extended functions of the SOPHO-LAM operating in DTE mode are as follows:
-
The SOPHO-LAM can select the calling or answering mode of the modem via CT142.
Output circuit CT142 of the SOPHO-LAM is connected to circuit CT126 of the modem.
CT142 is programmable. When CT142 is active the modem transmits in the high
frequency channel, otherwise in the low frequency channel.
-
The SOPHO-LAM can be programmed via the V.24 interface. This way of programming
can be protected with a password.
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