WEEK 3 : DAY 2 UTS NETWORK contd...

3.2.1 UTS NETWORK

UTS NETWORK TOPOLOGY

        The above diagram shows how different stations in UTS are connected to each other through OFC. OFC then goes into STM of respective station. Now station has two pairs of optical ports one for getting connection from previous station and other giving connection to next station. This way the STM solves two purposes 1) It acts as a module to connect to OFC network 2) As a repeater as we all know the bandwidth decreases with distance.

        Two other precautions are also taken. They are

1) Ring topology is preferred where ever possible so that if cable cut from one side other side will continue to work as linear network

2) 64 Kbps BSNL lines are leased by railway as a backup also.

        An example of this is given below

UTS TOPOLOGY EXAMPLE

        NOTE :- The above is just an example. It is not the original topology.

        Now you can see that major station are connected by ring topology and are also given protection by 64 Kbps BSNL lines also. Sometimes, minor station is not given protection. It all depends on cost factor and other factors also.

3.2.2 NETWORK MANAGEMENT SYSTEM

        It is also important to check the status of network continuously so as to find faults. The STM itself contains a feature called NMS ( Network Management System) which can be configured to tell the status of network at any moment of time from any authorised place. It also let's you to decide the path of the network also. STM uses TDM ( time division multiplexing ) along with FDM ( frequency division multiplexing )  also. So we nee to create paths by allotting time slots to different networks so they can work quickly and effeiciently

        So, that's all folks!!! That ends this week . I know you are disappointed. I was too!! but that's all they taught me. With this I ask for your forgiveness and GOOD BYE!!!

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