3Com Courier Reference

Contents

3Com Courier Reference Manual pdf 138 page image

17-4 C HAPTER 17: T ROUBLESHOOTINGand a Line Feed before and after the RING and CONNECT messages.Sending the Quiet mode command, ATQ1, should solve the problemProblems thatOccur AfterConnectingYour screen displays random or "garbage" charactersMake sure that the Courier V.Everything modem is set to the same bitrate, word length, parity, and number of Stop bits as the device to whichyou are connecting.If the settings are correct, the problem may be with the phone line. Trythe following measures: Place the call again. The phone company routes even local callsdifferently each time you call. Call a different device to see if the problem persists. The problem maybe with the device you first tried to call.If the modem is set to a fixed serial port rate (&B1) and your software isfixed at 19.2K, 38.4K, 57.6K, or 115.2K bps, the reason may be one ofthe following: Your computer may not support the higher serial port rate. If this isthe case, fix your software rate at 9600 bps. If you use memory-resident programs (TSRs-Terminate and StayResident programs) or disk-caching programs, they may be interfering.Try disabling them before you run your communications software Check that your software and the Courier V.Everything modem are setfor the same kind of flow control, either hardware or software. Somecommunications programs also require that you disable the type youare not usingMany CRC errors Send AT&F1 to enable hardware flow control and other optimisedsettings. Try a different file transfer protocol (use ZMODEM if it's available tyou).