The Avaya Site Administration Time Synchronization feature sends synchronization messages specified in Standard Time to Communication Manager using the set time command. To calculate the offset values that represent the time difference between the Avaya Site Administration client computer and the Communication Manager locations, normalize all location times to their Standard Time equivalents.
Important:
Always calculate the offset values based on comparisons between Standard Time equivalents. If DST rules are not the same for the Avaya Site Administration client location and a target Communication Manager location, significant synchronization errors can result.
The following table uses the Communication Manager locations described in the example scenario to derive correct offset values for the client computer and the Communication Manager locations.
Note:
The local time listed in the table are random and only to illustrate the time differences between locations. You can use any set of relative location time.
Local time or normalized standard time |
Calculated offset value |
Avaya Site Administration Client computer in New York |
Communication Manager in New York |
|
Local Time: 06:00 EDST |
Local Time: 06:00 EDST |
|
Adjusted Standard Time: 05:00 EST |
Adjusted Standard Time: 05:00 EST |
0 |
Client computer in New York |
Communication Manager in Denver |
|
Local Time: 06:00 EDST |
Local Time: 04:00 MDST |
|
Adjusted Standard Time: 05:00 EST |
Adjusted Standard Time: 03:00 EST |
-2 |
Client computer in New York |
Communication Manager in Phoenix |
|
Local Time: 06:00 EDST |
Local Time: 03:00 MST |
|
Adjusted Standard Time: 05:00 EST (New York) |
Adjusted Standard Time: 03:00 MST |
-2 |
Client computer in New York |
Communication Manager in London |
|
Local Time: 06:00 EDST |
Local Time: 11:00 BST |
|
Adjusted Standard Time: 05:00 EST |
Adjusted Standard Time: 10:00 BST |
+5 |
The table demonstrates the importance of normalizing all local times to Standard Time when calculating time offsets. The unadjusted time difference between Denver and New York is 2 hours and the calculated offset is minus 2 hours.
However, despite the fact that the unadjusted time difference between New York and Phoenix is 3 hours, the calculated offset is also minus 2 hours, which is the same offset value that is calculated for New York and Denver.
