Synchronize with Caller ID1 This function, when enabled, synchronizes the real-time clock with Caller ID (CID) messaging: call processing compares the time of a CID message to the system real-time clock and, if the difference is more than two minutes, resets the real-time clock to match the time (minutes) of the CID message. The system will analyze each such message (or — if it receives more than four calls with CID information within a one-minute period — as is needed). Select ENABLE or DISABLE by pressing a scroll key (either or ). Choosing ENABLE will allow the CID data to update the time and date. Default: Disabled. Esi-Link-related notes (see also “Function 83: Esi-Link programming,” pages M.9–M.10): If “synchronize with Caller ID” is enabled, Esi-Link time synchronization (from location 700) will be disabled. If “synchronize with Caller ID” is disabled, Esi-Link time synchronization will be allowed (minutes only). When Esi-Link is used, all cabinets’ time will be synchronized by cabinet 700, unless “synchronize with Caller ID” is enabled in Function 142. 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 DISABLE is best for those areas that don’t observe DST. Default: Disabled.