Smartmodem 1200 or compatible

If you have a Hayes Smartmodem 1200 or AT-compatible modem, switches 3 and 8 should be down:

	1	2	3	4	5	6	7	8
up
down

When switch 3 is down, the result codes are sent by the modem to the terminal or computer. When switch 8 is down, the modem can interpret the command being issued. This allows both Windows and UNIX communications systems to work.

``AT-compatible switch settings'' lists the function of each switch setting.

AT-compatible switch settings

Switch	Position	Function
1	up	Modem responds to DTR from computer
	down	Modem forces DTR high, so no signal is required from computer
2	up	Result codes are in English
	down	Result codes are numeric
3	up	There are no result codes
	down	Result codes are sent in response to each modem command
4	up	Commands are echoed
	down	Commands are not echoed
5	up	Modem answers phone
	down	Modem does not answer phone
6	up	CD is asserted when carrier is actually present
	down	CD and DSR are forced high
7	up	Modem is attached to single-line phone
	down	Modem is attached to multi-line phone
8	up	Modem does not recognize dialing commands
	down	Modem recognizes dialing commands

The asterisks () indicate the switch settings required. If you have a different modem, consult your reference manual for the proper switch settings to both send and receive calls.