ESI 900 - 2: Adjust for Daylight Saving Time; Function 143: Clock adjustment

IP Server 900 Programming Manual Function 1: System function programming
D.3
2: Adjust for Daylight Saving Time
This function, when enabled, causes the real-time clock to adjust itself automatically for Daylight Saving
Time (DST). Select AUTO or DISABLE for DST by pressing a scroll key (either  or ). Choosing
DISABLE is best for those areas that don’t observe DST.
Default: Disabled.
Note: If this function is enabled and it causes an automatic time change, the system won’t update the real-
time clock from either Caller ID messages (Function 1421, above) or Esi-Link time synchronization
for 25 hours before and 25 hours after the time change is due to be effective (i.e., 2:00 AM Sunday).
Function 143: Clock adjustment
This function lets the Installer or Administrator have the system automatically compensate for a clock that’s
running too fast or too slow. The clock adjustment speeds up or slows down the clock over a 30-day period by
the amount selected. If the system clock is running slow, select a positive value. If the clock is running fast,
select a negative value.
Range: -2 to +5.5 minutes. Default: 0.
Example: If the clock is running two minutes fast over a month, select -2 (minus two minutes).