Question about modems
nw.johnson at ieee.org
Wed Nov 13 12:13:18 CST 2019
Not much in the manual. I browsed it looking for anything about data
bits and stop bits. Nothing.
p1-2: ' Commands given to the Smartmodem must be ASCII coded at baud
rates between 110 baud and 1200 baud. Once 'on-line', any code at any
speed from 0 to 300 baud may be used.'
p 9-1 'Do not send any data to the Smartmodem while it is in local
command mode unless the data is intended to be a command. Random data
can confuse the baud rate detector and the command decoder giving
That is al lI can find i nthe manual.
On 13/11/2019 12:39, Jim Brain via cctalk wrote:
> On 11/13/2019 5:31 AM, Nigel Johnson via cctalk wrote:
>> I actually have an original Hayes 300 modem. Would it be any use if I
>> could set it up for a a test, or would it need another genuine Hayes
>> one to talk to for what you need?
> I looked at the SmartModem 300. It looks like it completely detected
> the speed and parity internal to the unit. If you have a manual or a
> link ot one to validate, I think that would suffice. If it did do
> that, then it would have reconfigured itself to match the terminal and
> thus all communication would be in the same format (8N1, 7E1, etc).
> I did a quick check for an online manual, but my Google-fu is weak today.
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