Yes, there is an asymmetric delay caused by using an ADSL line. However, this really isn't that much of a problem.
When my computer was in the pool, I initially syncronized using some public strata 2 servers. By examining the offsets seen by the pool monitoring web pages, my computer was serving good accurate time with with an observed offset close to 0 milliseconds. Later, I purchased a Garmin GPS 18 LVC for use as a time source. After attaching it to my computer and making it my preferred time source, I then started seeing a consistent 8 millisecond offset from the public NTP servers on my computer, and the same 8 millisecond offset was observed from the pool monitoring pages. So my conclusion is that in my specific case, yes the asymmetric delay in my ADSL connection to the internet resulted in a systemic offset of time in my own local network. However, that offset is canceled by observers out in the public internet. _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
