[time-nuts] Embedded NTP server ideas and feature requests

Jim Lux jimlux at earthlink.net
Sun Feb 10 11:04:44 EST 2013

On 2/10/13 12:40 AM, David J Taylor wrote:
> - although I've never used it, I do like Chris's suggestion of power over
> Ethernet.  I see dozens of choices in Amazon's lists - is there a standard
> for the power adapter and level?
> []
> ==============================
> To clarify, now I've done a little reading, I would be expecting to use
> a local wall-wart power supply to inject whatever low-voltage DC (9V or
> 12V perhaps?) into the Ethernet cable, and would be happy to use an
> extractor at the far end (near the Laureline GPS NTP Server).  I would
> /not/ be using the higher voltage (up to 48V) specified in the PoE
> standard.

I would NOT do this.. (use a non standard voltage on the PoE)

too easy to hook the wrong thing up, some day.. Maybe your NTP widget is 
up on the roof, and you've got a buddy helping recable with a new switch 
that puts 48V on the wire, when your widget is expecting 12...

> By the way, a number of people have asked about a pre-built version of
> my Raspberry Pi server, and I've always have to turn them down, so a
> ready-to-go box like the Laureline with a GPS receiver sounds to have a
> good potential market.
> Cheers,
> David

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