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Your modem is pre-configured to automatically answer any incoming call, provided it is
switched on, is in local command state, DTR is high and is not performing a test. If you receive a
call on the phone line the modem is connected to, it will answer the call and attempt to connect
to the calling modem.
S Register 0 contains the number of rings the modem will wait before answering a call. If a value
of 4 is placed in S Register 0, the modem will answer an incoming call immediately after the
fourth ring. If a 0 value is placed in S Register 0, the modem will not answer an incoming call.
The communications standard used by the modem in its attempt to connect with a calling
modem is determined by the B command.
If the phone does ring, and verbal response codes are selected (ATV1), the modem will issue
RING messages until the number of rings stored in S Register 0 is reached. The modem will then
go on line, transmit an answer tone, and attempt to connect to the calling modem using the
communications standard selected by the B command.
By default the modem is set to B0. B0 is the auto range setting. This should connect to virtually
all communications standards and normally you do not have to alter this. As soon as a
connection is established, the modem will send a CONNECT message to your computer and
enter on-line state in answer mode.