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OCS BTS is a system which helps Courier Companies Track & Bill Packets sent through them. This system starts from the time a Packet is arrives at the Branch Office, and works several steps till the bill of the Packets moved, is printed.

The BTS has the following components:

 · Workstation

The user interface developed for Windows, runs on these workstations. These Workstations are connected to the Zonal Office Servers via LAN. They perform all the tasks on the Zonal Office Servers.

 · Zonal Office Server

Each Zonal Office (and where else required) has a Local Server on the LAN. These servers are Linux boxes, running MySQL as RDBMS. These Servers are connected to the International Server via Normal Dial-up Internet, and replication data both ways (in and out) from the International Server. All the Zonal Servers and the International Server has the same data for Manifests, CNs, and their Tracking details. To keep time of all the Zonal Servers, each server runs a program that keeps its time in synchronization with the time on three Time Servers running Atomic Clocks.

 · International Server

The International Server is also a Linux box running, MySQL. It receives data from all the Zonal Servers and replicates it to the other Zonal Servers.

Each zonal server keeps track of all the data addition, updating and deletion activity on it with the name of the user doing the activity, and the current time and date. It then sends all of the activities performed by users, and not by the Replication Process to the International Server. The International Server keeps track of all the activities it receives, with the time and date and the Zonal Server doing the activity. Each Zonal Server also gets all the activities from the International Server which are not his. Thus all the Servers gets all the data regardless of the location it was entered.