63 lines
2.1 KiB
Plaintext
63 lines
2.1 KiB
Plaintext
AST RESEARCH TECHNICAL BULLETIN TB-0134 11-11-85
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AST-3780 TROUBLESHOOTING
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The intent of this Technical Bulletin is to help the installer of
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AST-3780 isolate any problems which may arise. The bulletin
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will cover the situations reported most frequently by users of
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AST-3780.
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PROBLEM
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AST-3780 is activated and the connection to the host has been
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established. The transmit option is selected from the AST-3780
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software and the modem immediately starts streaming data.
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Streaming, in this context, refers to a constant request-to-send
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coming from the DTE interface, while the DCE interface is
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supplying a clear-to-send response, and the transmit data line is
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constantly sending a stream of data.
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SOLUTION
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There are only six reasons for this situation to occur. Their
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causes and resolutions are listed below in "most frequently the
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cause" order:
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I. The cable from the CC-432 card to the modem is missing
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line 15 or 17, or both.
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A. There is only one accurate way to assure that the lines
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are there, and that is through the use of an OHM meter.
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1. If an OHM meter is unavailable, make the user
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remove the hoods from the cable and visually
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inspect both ends.
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II. The modem is not supplying transmit and receive clocks.
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A. Check your modem manual to make sure that your modem
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is optioned for internal clocking.
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III. The CC-432 card has Jumpers 2 and 4 enabled instead of
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1 and 3.
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IV. There is an interrupt conflict within the PC.
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A. Other BSC cards
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B. Network cards
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C. Third party hard disk
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V. AST-3780 configuration file is selected for a different
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interrupt request line than that selected on the CC-432
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board.
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A. i.e., software selected for IRQ-2 while the CC-432
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is selected for IRQ-7.
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VI. The CC-432 board is defective and needs to be returned
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for repair.
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A. To insure that this is the cause, run the CC-432
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test supplied in the package.
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