[time-nuts] My latest Net4501 NTP Server

Jason Rabel jason at extremeoverclocking.com
Mon Nov 1 13:41:47 UTC 2010


Hi Bob,

I don't think it's a standard model. I got mine off eBay years ago... I haven't seen any more with the same setup in quite a while.
Probably some large OEM order for a specific project that ended up never happening.

Yes, it only has one Ethernet port, no PCI slot, and the MAX232 chip isn't there for the second serial port (which actually works
out better). I direct wired the tx/rx lines where the max232 chip *should* go, then I could connect the wires to the pads where the
connector is. Since the GPS communicates @ 3V TTL, and the soekris before RS232 conversion talks 3.3V TTL it cuts out extra
components.

> Your motherboard looks just like mine but is missing a lot of parts.  Looks
> like you have only one ethernet port vs 3 on mine, one transciever chip vs 3
> on mine (I assume these are ethernet transciever chips), no card slot on the
> right, etc.   Is this a standard offering from Soekris?
> 
> -Bob, N3XKB


I did some more investigation on my NET4511 (which was being sold on eBay as a Lockdown Networks device) and it appears the lines
for the second serial port never come out from under the CPU. :(  So now I'm thinking perhaps a pcmcia-to-serial port card, or more
than likely just wire the lines for the GPIO/TMR1N and use it as a PPS only source.





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