Double Characters Are Appearing On Your Monitor17-3; After You Dial, The Courier V.everything Modem Reports No Carrier And Then Hangs Up; Hear Ringing But The Courier V.everything Modem Won't An Swer17; The Courier V.everything Modem Acts As Though A Data Link Has Been Established, But No Call Was Receive - 3Com Courier Reference

Double characters are appearing on your monitor

After you dial, the Courier V.Everything modem reports NO CARRIER and then hangs up

Hear ringing but the Courier V.Everything modem won't answer
The Courier V.Everything modem acts as though a data link has been established, but no
call was received
The Courier V.Everything modem behaves as if Enter were pressed when you don't press
any keys
This is a signal that both the Courier V.Everything modem's local echo
and your software's local echo are on.
Type the command to turn off your online echo (ATF1) or turn your
communications software's local echo off (refer to your software's
documentation).
Try increasing S7 and decreasing S9 to allow more time for the
connection
Try calling a different device. If you are trying to connect to an older
modem at 2400 bps or less, it may not support error control. Try
sending AT&M0, and then try the call again. Reset the Courier
V.Everything modem (send ATZ) after you finish the call.
For external Courier V.Everything modems, look at the TR LED to make
sure that your terminal or computer is sending a DTR signal via the
EIA-232 interface.
Send ATI4 to the Couri e r V.Everything modem and check that S0 is set
to a value higher than 0. Also, check that DIP switch 5 is OFF.
Set &F1 and S0=1, then try again.
Carrier Detect (CD) may be overridden (with &C0), but your system may
require that the override be turned OFF (with &C1). Review your
communications software manual to see what CD operations are
required.
Your software may be misreading signals from the Couri e r V.Everythin
modem when the Courier V.Everything modem sends a Carriage Return
Problems That Occur Before Connecting 17-3