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NOKIA

GSM Architecture

Figurę 2. The three subsystems of GSM and their interfaces

The NMS is the operation and maintenance related part of the network and it is needed for the control of the whole GSM network. The network operator observes and maintains network ąuality and service offered through the NMS. The three subsystems in a GSM network are linked by the air-, A-, and O&M interfaces as shown in Figurę 2.

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TC Finland Issue Jan 2002

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