PTB Modem Time Service


Address: 127.127.23.u
Reference ID: TPTB
Serial Port: /dev/ptbu; 1200 baud, 8-bits, no parity
Features: none
Requires: /usr/include/sys/termios.h header file with modem control


No further information available.

Monitor Data

When enabled by the flag4 fudge flag, every received timecode is written as-is to the clockstats file.

Fudge Factors

time1 time
Specifies the time offset calibration factor, in seconds and fraction, with default 0.0.

time2 time
Not used by this driver.

stratum number
Specifies the driver stratum, in decimal from 0 to 15, with default 0.

refid string
Specifies the driver reference identifier, an ASCII string from one to four characters, with default USNO.

flag1 0 | 1
Not used by this driver.

flag2 0 | 1
Not used by this driver.

flag3 0 | 1
Enable ppsclock line discipline/streams module if set.

flag4 0 | 1
Enable clockstats recording if set.

Additional Information

Reference Clock Drivers

David L. Mills (