Description of the illustration ocsdg_calendar

This diagram contains the following elements in three sections, left to right:

A portable phone and a PDA connecting to a cloud representing GPRS and EDGE, and then connecting to the Oracle Mobile Data Sync server through a firewall on ports 80 or 443.
An Oracle Mobile Data Sync server in a DMZ, connecting to an Oracle Calendar server through another firewall on port 5730.
An Oracle Calendar server behind the DMZ.