Here's the description from the modem:
DESCRIPTION OF THE
AUTOMATED COMPUTER TIME SERVICE (ACTS)
The service uses multi-speed modems which should automatically adapt to
the speed of the originating modem. All messages are sent using standard
ASCII characters with 8 bits, no parity and 1 stop bit.
Format of the time message:
D L D
MJD YR MO DA H M S ST S UT1 msADV <OTM>
47999 90-04-18 21:39:17 50 0 +.1 045.0 UTC(NIST) *
47999 90-04-18 21:39:18 50 0 +.1 045.0 UTC(NIST) *
etc...
The message transmits Universal Coordinated Time (UTC), the
official world time referred to the zero meridian of longitude.
The MJD is the modified Julian Day number, which advances by 1 at 0000
UTC every day.
The DST parameter provides information about Daylight Saving Time, using
the model valid for the continental US:
00 = US is on standard time (ST). 50 = US is on DST.
99 to 51 = Now on ST, go to DST when your local time is 2:00 am and the
count is 51. The count is decremented daily at 00 (UTC).
49 to 01 = Now on DST, go to ST when your local time is 2:00 am and the
count is 01. The count is decremented daily at 00 (UTC).
LS = Leap second flag is set to "1" to indicate that a leap second is to be
added as 23:59:60 UTC on the last day of the current month (usually June or
December). The flag will be set to "2" if the last second of the current
month is to be dropped. The second following 23:59:58 UTC on the last day
of the month will be 00:00:00 of the next day in that case. The flag will
remain on for the entire month before a leap-second event; it will be 0
otherwise.
DUT1 = Approximate difference between earth rotation time (UT1) and UTC, in
steps of 0.1 second. DUT1 = UT1 - UTC
The specified time is valid when the "*" on-time marker is received. This
character will be transmitted 45 ms early to compensate for the nominal
delay in the modems and the telephone connection.
The maximum connection time will be 40 seconds unless you transmit a
"%" character before then. If this character is received, the transmitter
will break the connection at the next on-time marker.
For more information write:
NIST-ACTS
Time and Frequency Division
Mail Stop 847
325 Broadway
Boulder, CO 80303
e-mail: t...@time.nist.gov
The software and additional information on ACTS and other
services are also available on the web at
www.boulder.nist.gov/timefreq.
On 10/23/2015 07:39 PM, Kurt McCullum wrote:
Well maybe ? works with a modem connection but with Telnet it
disconnects after giving the time. But the link I sent has all the
information of the fields.
I could build something into mComm to accept a time request from the
model-t. A simple Basic program could open up the port, request the
time and set the time & date of the model-T with the information that
is sent back. But realistically, how useful is that?
Kurt
On 10/23/2015 7:30 PM, Donald Kyllo wrote:
While the time is being displayed, press the ? to get a description
of all the numbers in the string.
Don
On 10/23/2015 07:09 PM, Kurt McCullum wrote:
I just tested this on my T200 with mComm. Works fine. From the file
viewer Press ! and then the Telnet URL prompt comes up. Entering
time.nist.gov:13 and pressing ENTER gives the time. I'm not sure
what the numbers before the date or after the seconds are but it
gives a single time entry.
Kurt
On 10/23/2015 6:14 PM, Donald Kyllo wrote:
time.nist.gov 13
