Answering Process
The answering process causes the modem to answer a call. The process
may be started by the A command, by turning DTR
on, by the modem detecting a certain number of ring events, or by power
going on in the dumb leased-line mode.
The answering process sets the speaker volume. If &Q2
or &Q3 is in effect, it turns off CTS. If &Q1 or &Q4 is
in effect, and S0>0, then it turns off CTS. The modem then goes off-hook,
turns on the OH LED and goes to the handshaking process (answer mode).
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