Suggested modem strings

Modem AT Commands:

Zoom 2400 and most other 2400 baud modems

ATS0=1 Answer on 1 ring

AT&D DTR on

AT&C1 Data Carrier Detect on

ATM0 Speaker off

ATQ1 Disables responses to computer

AT&W Save configuration
 
 

For 14.4 & Faster Modems

Use a communication program set at 19.2 baud , 8,N,1

Set Weather Report at 19.2 baud

Practical Peripherals PM144MTII

ATS0=1 Answer on 1 ring

AT&D DTR on

AT&C1 Data Carrier Detect on

ATM0 Speaker off

ATQ1 Disables responses to computer

AT&W Save configuration
 
 

For Boca 14.4

ATS0=1 Answer on 1 ring

AT&D DTR on

AT&C1 Data Carrier Detect on

ATM0 Speaker off

AT&M4

AT&R1

ATQ1 Disables responses to computer

AT&W Save configuration
 
 

For Zoom 14.4

ATS0=1 Answer on 1 ring

AT&D DTR on

AT&C1 Data Carrier Detect on

ATM0 Speaker off

AT&K0 Disables flow control

ATQ1 Disables responses to computer

AT&W0 Save configuration

For Cardinal 28.8 V34/VFC

ATS0=1 Answer on 1 ring

AT&C1 Data Carrier Detect on

ATK0 Disables flow control

AT&D0 DTR on

AT&W0 Saves configuration

For US Robotics 56K

ATS0=1 Answer on 1 ring

AT&C1 Data Carrier Detect on

AT&K0 Disables flow control

ATM0 Disables speaker

ATQ1 Disables responses to computer

AT&W0 Saves configuration

Dip Switch 1, 4 and 8 to the on position (down)

Dip Switch 2,3,5,6 and 7 in the off position (up)

Hardware Configuration

Standard AT modem cable (DB9 female to DB25 male) except pin 6 (DSR) from the cable DB25 must go to pin 8 (DCD) on the modem. Pin 8 (DCD) on the cable DB25 is open and pin 6 (DSR) on the modem is open.