How the BlackBerry Attachment Connector
communicates with BlackBerry Attachment
Service instances
When a user sends a request to view an email message attachment on a BlackBerry device, the BlackBerry device sends a
request to the BlackBerry Enterprise Server to convert the attachment. The BlackBerry Enterprise Server uses a
BlackBerry Attachment Connector to send the attachment data to a BlackBerry Attachment Service, which processes the
request and returns the attachment data to the BlackBerry Attachment Connector. The BlackBerry Enterprise Server
requests the attachment data from the BlackBerry Attachment Connector and sends the attachment data to the user's
BlackBerry device.
By associating multiple BlackBerry Attachment Service instances with a single BlackBerry Attachment Connector, you can
create a BlackBerry Attachment Service pool. You can configure different BlackBerry Attachment Service instances as
dedicated servers for processing specific file formats. For example, you can create a BlackBerry Attachment Service pool
that contains three BlackBerry Attachment Service instances, where one instance processes email message attachments
that are in audio file formats, one instance processes email message attachments that are in image file formats, and one
instance processes email message attachments that are in all other file formats. For more information about configuring
high availability for the BlackBerry Attachment Service, see the
BlackBerry Enterprise Server Planning Guide
.
You can change how a BlackBerry Attachment Connector processes attachment requests that it cannot deliver to a
BlackBerry Attachment Service, and you can change how a BlackBerry Attachment Connector restores a lost connection
to a BlackBerry Attachment Service.
Related information
Create a BlackBerry Attachment Service pool for high availability,
114
Change how a BlackBerry Attachment Connector
retries sending requests to a BlackBerry Attachment
Service
The BlackBerry Attachment Connector sends requests to view attachments from users' BlackBerry devices to a BlackBerry
Attachment Service. You can change how a BlackBerry Attachment Connector processes attachment requests that it
cannot deliver to a BlackBerry Attachment Service.
Depending on the number of users in your organization's environment, if you change the BlackBerry Attachment
Connector settings, your organization's environment might experience a performance impact.
Administration Guide
Managing your organization's messaging environment and attachment support
357
