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4.1 Standard mode LAN-Modem <> LAN-Modem
Like standard modems in a land line network, the devices are
connected in pairs, i.e. there is a LAN-Modem on both the
calling and receiving side.
Starting with an AT dial-up command (ATD...) the calling LAN-
Modem opens a TCP connection to the destination system. In
response to this incoming call, the character sequence RING
and the hardware signaling are generated on the serial side on
the RI line. After the call is answered with the ATA command
there exists then a character-transparent data connection.
30
LAN-Modem operation settings
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