IPECS Release 5
Feature Description & Operation 5.0
2-35
2.9 AUTOMATIC SYSTEM DAYLIGHT SAVINGS TIME
Description
The system can automatically adjust for Daylight Saving Time (DST). When DST is enabled, the
system will adjust the system time forward one (1) hour at the DST Start time and back one (1) hour
at the DST End time. The system time is sent for display to all devices and terminals and is the
basis of the system various time-based features (Walking COS, Wake-up Alarm, etc.).
Operation
System
Operation of this feature is automatic.
Conditions
1. The DST Start and End times are set through the Web Admin interface only.
2. The interval between the DST Start and End times must be at least 7 days.
Programming
SYSTEM 1. System Time (PGM 178-Btn 1)
2. System Date (PGM 178-Btn 2)
3. DST Enable (PGM 178 – Btn 3)
3. DST Start & End Time (Web only)
Related Features
Auto Service Mode Control
Automatic System Time Synchronization
System Clock Set
Hardware
2.10 AUTOMATIC SYSTEM TIME SYNCHRONIZATION
Description
When enabled, the system automatically determines and sets the time of day employing Network
Time Protocol (NTP) or ISDN time messages. When using NTP, the system, at ten (10) minute
intervals, requests the time from the specified NTP time server and receives GMT time. This feature
allows the System Time to synchronize with the NTP time server automatically. If the time deviates
more then two (2) seconds, the system clock is adjusted to match the NTP server.
When using ISDN, the system receives the time of day in ISDN messages and automatically adjusts
the time if the time in the system deviates from the ISDN time.
Operation
System
Operation of this feature is automatic.
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