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AST RESEARCH TECHNICAL BULLETIN TB-0271 04/06/87
HAYES SMARTMODEM COMPATIBILITY
Older revisions of the internal Hayes Smartmodem 1200B
are not compatible with AT machines and, therefore, the
Premium/286. The modems were not designed to run at
AT speeds.
According to Hayes technical support, these modems can
be identified as follows:
Older Version: Three position switch block with a
white speaker volume adjustment
knob on the back.
Newer Version: Six position switch block.
No other indentifiers are available at this time.
NOTE: Compatibility Lab has successfully tested the
Hayes Smartmodem 1200B with rev/assy# of A052
00243 331. The software that was used was SmartCom
II V2.1 and BitCom V2.6A. Crosstalk V3.61 will
also run if the Premium/286 is booted up at 6 or 8
Mhz.