[ntp:questions] Reasons of NTP not to use GPS source

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On 4/9/2014 3:01 PM, William Unruh wrote:> BlackLists wrote:
>> The current version is TIA/EIA-232-F (circa 1997, last updated 2002?)
>
> And this is irrelevant.  The question is not what the
>  standard says but what the serial ports actually handle.
> Again, does anyone know of a serial port which does NOT
>  handle TTL logic imputs?

Yes, I have several hundreds (if not thousands)
 that use a TI chip, that will not change the logic level,
 if the input does not go negative.

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