[ntp:questions] Can NTP sync within 1ms

Jan Ceuleers jan.ceuleers at computer.org
Mon Apr 28 17:45:02 UTC 2014

On 04/28/2014 07:37 PM, Henry Hallam wrote:
> On Mon, Apr 28, 2014 at 10:14 AM, William Unruh <unruh at invalid.ca> wrote:
>> Not sure why they would need a lower cutoff, except that it would allow
>> the ancient telephone receivers to comply. Certainly one can make
>> cheap receivers now that go a lot lower than 300Hz.
> Because 3.1 kHz of bandwidth is cheaper for the telcos to trunk than 3.4 kHz.

Not really. The reason is that DC is used for signalling (e.g.
on/off-hook, hookflash, pulse dialing).

Way OT tho.

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