Blackberry ENTERPRISE SOLUTION SECURITY - ENTERPRISE SOLUTION - SECURITY TECHNICAL Manual do Utilizador descarregar pdf (Página 52)

3. The BlackBerry Dispatcher sends the request to the BlackBerry Collaboration Service over port 3200. If the BlackBerry

Collaboration Service is located on a remote computer, the request remains encrypted using a Research In Motion

proprietary protocol.

4. The BlackBerry Collaboration Service checks the BlackBerry Configuration Database to find out if the maximum number

of sessions has been reached, and performs one of the following actions:

• If the maximum number of sessions has been reached and a timeout limit is set, the BlackBerry Collaboration

Service logs out any instant messaging sessions on BlackBerry devices that are out of coverage, and any instant

messaging sessions that are no longer sending status messages to the BlackBerry Collaboration Service.

• If there are no idle sessions, the BlackBerry Configuration Database sends a "Server Busy" status message to the

BlackBerry device and rejects the login request.

• If the maximum number of sessions is not set and the number of sessions equals the total number that the IBM®

Lotus® Sametime® API supports, the BlackBerry Configuration Database sends a "Failed" status message to the

BlackBerry device and rejects the login request.

5. The BlackBerry Collaboration Service checks the BlackBerry Configuration Database to verify that the user has

permission to use the collaboration client, and connects to the IBM Lotus Sametime server. The BlackBerry Collaboration

Service starts an encrypted proxy connection over TCP/IP using the IBM Lotus Sametime API, reformats the request

from the RIM proprietary protocol format into one that the IBM Lotus Sametime API supports, and sends the request.

By default, the BlackBerry Collaboration Service starts the connection over port 1533 unless you specify a custom port

number.

6. The IBM Lotus Sametime server accepts the login request from the BlackBerry device, starts a dedicated TCP/IP

connection for the session, and starts listening for requests from the BlackBerry device for that session.

7. The BlackBerry Collaboration Service sends the acceptance, in encrypted and compressed format, through the

BlackBerry Dispatcher to the BlackBerry device, and creates a cache of the connectivity information to maintain the

new instant messaging session.

Feature and Technical Overview

Instant messaging process flows

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Blackberry ENTERPRISE SOLUTION SECURITY - ENTERPRISE SOLUTION - SECURITY TECHNICAL Manual do Utilizador Página 52