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Description of the DCM-7
SW
2
3
4
5
6
Table 1. DIP Switch Settings in Tandy Protocol Mode
Position
ON
OFF
ON
OFF
Should be OFF
Should be OFF
Should be OFF
ON
Function
Forced DTR (Data Terminal Ready). Modem accepts
command from the local computer without a DTR
signal.
True DTR. Modem is OFF until it receives a true DTR
signal from the computer.
Forced carrier. Modem assumes forced carrier
detecf1> and disables the G command.
Forced/True carrier. Modem selects between forced
carrier detect and true carrier detecf
2
> according to
the
G
command input.
No function.
No function.
No function.
Auto-answer enable. Modem assumes auto-answer
upon power-up.
OFF
Auto-answer disable. Modem assumes auto-originate
upon power-up.
7
Should be ON
Tandy. Sets the Modem to Tandy protocol mode.
8
Should be OFF No function.
*
1)
Forced carrier detect ... Modem issues a forced carrier signal to the local com-
puter as soon
as
power is turned ON.
*2) True carrier detect ... Modem will be off until it receives true carrier from the
remote computer.
DIP Switch 2 interlocks with DIP Switch 6 as follows:
i
ON
i
ON
Modem assumes auto-answer with forced carrier
detect.
Modem assumes auto-originate with forced car-
rier detect.
6
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