The diagram above provides a visual description of how data is exchanged between the mobile units and the PtMS for Windows SQL Server database.

The types of information exchanged between PtMS Mobile Units and the PtMS for Windows Network database include:

1. Schedules are delivered electronically to the vehicle Mobile Unit eliminating the printing of each schedule, nor do the drivers have to make special arrangements to retrieve them each day.

2. Schedule trip results are recorded electronically as they occur and automatically update the PtMS schedule trip record. Drivers using a touch screen can complete recording trip results in seconds. The data is automatically transferred to the PtMS for Windows network database. Dispatchers see the trip results on their screen within minutes.

3. GPS Vehicle Tracking data is continuously being sent from each vehicle to the PtMS Mobile database allowing dispatchers to view vehicle progress and location in real time.

4. Text Messages from Dispatch to Driver and Driver to Dispatch are delivered to the driver and dispatcher.

Changes in PtMS for Windows SQL database are transferred to the PtMS Mobile database residing on the same network file server. These new data or changes to existing records are transferred to the secure PtMS Mobile web server which is connected to each of the mobile units. The mobile units update their local tables for display and display the information to the driver.

A copy of the data resides on the Mobile Unit so it does not have to maintain contact with the PtMS Mobile web server at all times. This allows for temporary interruptions in cell service.