3Com AccessBuilder 980/000048/001 User Manual
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Contents
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3-6 CHAPTER 3: TROUBLESHOOTINGOn-line OperationData is scrambledCheck that the character format (data bits, parity, and stop bits) is set tothe same value in both modems.Missing data during a transferCheck that you are using the same method of flow control for both themodem and the DTE.If using XON/XOFF flow control, check that the modem’s parity matchesthe DTE’s parity.Private-line OperationModems do not train-up on private linesCheck that the correct cabling is used for your application.Check that one modem is configured for answer mode and the other isconfigured for originate mode.Check that both modems are using the same modulation scheme.Dial Backup OperationModems do not establish a PSTN link when the Private line failsCheck that the communicating modems are configured to support dialbackup, as described in the AccessBuilder 7000 AT Command Reference.Check that one modem is configured to initiate the backup (i.e. is themaster modem, and has the backup telephone number stored in itsdirectory location 8) and the other modem is configured to be a slave(its directory location 8 is empty).Check that both modems are using the same modulation scheme overtheir PSTN line. |
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