45 lines
2.1 KiB
Plaintext
45 lines
2.1 KiB
Plaintext
AST RESEARCH TECHNICAL BULLETIN TB-0131 11-01-85
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COMPATIBILITY OF AST-5251/12 WITH HAYES 2400 BAUD MODEM
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The Communications Department has completed testing of the Hayes 2400
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baud modem. Our test showed that the Hayes modem will work with the
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AST-5251/12 as long as the modem is configured properly.
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To accomplish this, you will first need to attach the modem to an
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asynchronous port, and then initialize it for 2400 baud with a
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communications software package. After this has been accomplished,
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you will want to send a set of "AT" commands to the modem.
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For the modem that will reside at the PC, the commands are as follows:
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AT&F................Sets modem to synchronous mode
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AT&M2...............Store Number Dial (Auto-Dial mode)
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AT&Z(Phone #).......Store telephone number
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AT&R0...............CTS tracks RTS
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ATS26=50............Sets RTS-CTS time delay
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ATQ1................Disables result codes back to the terminal
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ATE0................Inhibits Command Echo
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AT&W................Writes configuration to nonvolatile memory
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This will set the modem to Synchronous Auto-Dial. For the modem that
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will reside at the host, the commands are as follows:
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AT&F................Sets modem to synchronous mode
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ATS0=1..............Sets modem to Auto Answer
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AT&M3...............Manual dial through DTR control
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AT&R0...............CTS tracks RTS
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ATS26=50............Sets RTS-CTS time delay
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ATQ1................Disables result codes back to the terminal
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ATE0................Inhibits Command Echo
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AT&W................Writes configuration to nonvolatile memory
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This will set the modem to Synchronous Auto-Answer. After this has
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been accomplished and the modems are attached to the system, you would
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then bring up the AST-5251/12 package. When the 5251/12 is brought
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up, it will cause DTR to rise and in turn the modem will start
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dialing. When the two modems establish communications the squelch
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will stop and the 5251/12 will be on-line.
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