On 9/3/13 11:21 AM, Poul-Henning Kamp wrote:
In message <[email protected]>, Jim Lux writes:
In this case, all the messages were presumably handled by the same
carrier, so the issue of skew in timestamps is negligible;
Anything but.
The text-messages are likely stamped by the SS7-message-gateway
and the 911 call by the countys 911 equipment.
I was assuming (with no real basis, I realize) that the 911 call time
came from the cell equipment, rather than the Public Safety Answering
Point log. The PSAP log would have no particular reason to be synced to
the carrier equipment. It could well be "what time was on the watch of
the guy starting the equipment", although these days, one would *think*
that they use something like NTP to set the system time.
However, given my frustrated experience trying to get folks doing
testbeds and ground support equipment here at JPL to *please*
synchronize your computers meaningfully so we can merge logs, I wouldn't
count on it. Or maybe they sync once every 24 hours.
And yes, there can be quite a delay from you press "send" until
the SS7-message-gateway sees the text-message.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
