[ntp:questions] Getting PPS on a modern rack-mounted server?

David L. Mills mills at udel.edu
Fri May 30 15:32:41 UTC 2008


John,

The PPSAPI was designed so that any serial device, including the 
console, could be used for the DCD signal. Our problem with Sun Netras 
is that the DCD signal is not supported. Something like a SIIG serial 
card should work just fine.

Dave

John Ioannidis wrote:

> This may sound like an embarrassment of riches, but here is my problem: 
> I have some rack-mounted servers (IBM System x3650 to be precise) that I 
> need to synchronize with a PPS signal.  The problem is, of course, that 
> the machines have only one serial port, which I want to use as a serial 
> console, and of course they have no parallel ports.
> 
> Any suggestions?  Can I use a PCI serial card? Will that have acceptable 
> jitter?
> 
> Thanks,
> 
> /ji




More information about the questions mailing list