Problems That Occur Before Connecting 15-3Double characters are appearing on your monitorThis is a signal that both the Business Modem's local echo and yoursoftware's local echo are on.Type the command to turn off your online echo (ATF1) or turn yourcommunications software's local echo off (refer to your software'sdocumentation).After you dial, the Business Modem reports NO CARRIER and then hangs upn Try increasing S7 and decreasing S9 to allow more time for theconnection.n Try calling a different device. If you are trying to connect to an oldermodem at 2400 bps or less, it may not support error control. Trysending AT&M0, and then try the call again. Reset the BusinessModem (send ATZ) after you finish the call.Hear ringing but the Business Modem won't answern Look at the TR LED to make sure that your terminal or computer issending a DTR signal via the EIA-232 interface.n Send ATI4 to the Business Modem and check that S0 is set to a valuehigher than 0.n Set &F1 and S0=1, then try again.The Business Modem acts as though a data link has been established, but no call wasreceived,Carrier Detect (CD) may be overridden (with &C0), but your system mayrequire that the override be turned OFF (with &C1). Review yourcommunications software manual to see what CD operations arerequired.The Business Modem behaves as if were pressed when you don't press any keysYour software may be misreading signals from the Business Modem whenthe Business Modem sends a Carriage Return and a Line Feed before andafter the RING and CONNECT messages. Sending the Quiet modecommand, ATQ1, should solve the problem.
