User guide

BlackBerry Enterprise Server. When the BlackBerry Infrastructure becomes available again, the BlackBerry Enterprise
Server resends messages that it did not receive acknowledgment packets for.
What happens to data that is not delivered because a
device is not available on the wireless network
When a user sends a message from a BlackBerry device, the BlackBerry Infrastructure might not be able to deliver the
message to a device immediately if the device is not available on the wireless network. A device might not be available if it
is outside a wireless coverage area or if the device is turned off.
If the BlackBerry Infrastructure cannot deliver a message after 10 minutes, the BlackBerry Infrastructure notifies the
BlackBerry Enterprise Server and deletes the message. The BlackBerry Enterprise Server requests a notification message
from the
BlackBerry Infrastructure when the device becomes available over the wireless network. When the device
becomes available over the wireless network, the BlackBerry Infrastructure notifies the BlackBerry Enterprise Server. The
BlackBerry Enterprise Server sends the message to the device.
If the message is not delivered after 7 days, the BlackBerry Infrastructure notifies the sender’s device that it cannot deliver
the message.
Security Technical Overview Protecting communication with a device
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