37 lines
1.0 KiB
Plaintext
37 lines
1.0 KiB
Plaintext
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AST RESEARCH, INC. TECHNICAL BULLETIN #TB-0351 12-28-87
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UDS SYNCHRONOUS MODEM/INTERNAL CONFIGURATION
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Universal Data Systems (UDS) synchronous modems are widely used
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with AST data communications products that require a
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synchronous modem. This includes all products based around the
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AST CC-432 board, such as the 5251/12, SNA, BSC, 3770, and 3780
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packages. The following information was obtained from UDS for
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their 208A/B modems, but the general principles apply to all
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UDS synchronous modems.
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208A/B modems - important settings for dial-up use:
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-jumper marked 2w/4w should be set to 2w (2 wire use)
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-jumper marked 50ms/150ms should be set to 150ms (CTS
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delay)
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-jumper marked 8.5 ms/50 ms should be set to 50ms (CD
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delay)
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-jumper marked RTS - CXRON/DTE should be set to DTE (RTS
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controlled by terminal rather than forced on
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continuously).
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Additionally, UDS modems are Bell compatible, not
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CCITT V.series compatible.
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