Tandy DC-2212 Operation Manual page 37

Note: As you can see, there are switches in the I command sub-menu which will
completely disable your modem's ability to start a disconnect sequence. If for some
reason you decide to turn off these disconnect options, there are only two ways you can
force the DC-2212 to go back off-line. Turn off DTR or turn off the power switch.
c,
c
Clear out all user options
The C command is the only command in the command receptive state which can bump
you back to the waiting state, without first passing through an on-line condition.
This command clears all user options back to the modem's power-on defaults. It also
clears out any telephone number you might have stored in dialer memory. You can use
this command when you have changed several parameters and you don't want to go
back and change them again, one-by-one. It also saves you from having to cycle the
power switch off and on .
X,x Exit Command Receptive State. Execute
current switches.
The
X
command tells the modem that you have set up the DC-2212 the way you want
it and now is the time to execute your instructions. The modem will do one of three
things:
1. Enter a waiting state and monitor the telephone lines for an incoming call
(auto-answer mode).
2. Seize the telephone lines and monitor for carrier (if in manual originate or
manual answer mode) or the modem will start its signaling sequences (if in
auto-originate).
3 . Enter the analog loop (self-test) mode.
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