It is possible for the connection between a device and server to time out without the device being notified of the outage. In this case, changes on the server that need to be pushed to the client are not pushed until a later time. The heartbeat interval prevents the time out and maintains the connection, but it can also decrease battery life.
By automatically adjusting the heartbeat interval to slightly less than the smallest timeout, Lotus Notes
® Traveler can automatically maintain the connection.
Although the heartbeat interval for each connected client is automatically adjusted by Lotus Notes
Traveler to be optimal, the configuration parameters can be tweaked to slightly improve operation. By default, the Heartbeat Algorithm Maximum Interval
is set to 15 minutes in the Lotus Notes
Traveler server configuration document. If you have devices earlier than Lotus Notes
Traveler 8.5.2 that use TCP push, leave the max at 15 minutes. But, if you are running all devices on Lotus Notes
Traveler 8.5.2 or later using HTTP push, there are advantages to increasing the maximum setting to 30, 45, or 60 minutes.
If you do modify the heartbeat algorithm maximum interval, set it to a number slightly less than the timeout of the underlying network connection for all users, if known. For example, if all Lotus Notes
Traveler clients are connecting over a VPN that has an idle timeout of 30 minutes, then set the maximum heartbeat interval to 28 or 29 minutes.
Apple devices use a different heartbeat algorithm (the ActiveSync algorithm). The ActiveSync algorithm uses the Lotus Notes
Traveler minimum and maximum intervals, so these apply to all devices. The other Lotus Notes
Traveler heartbeat algorithm settings apply only to other devices.
Parent topic: Setting auto sync options