7696081884

GSM service area

PLMN service area (one per operator)

Location area

INTERFACES:

There are different types interfaces

•    Air Interface (or) Um Interfaces]

Interface between the MS and BTS

•    Abis Interface

Interface between the BTS and BSC

•    A Interface

Interface between the BSC and MSC

TRAFFIC CASES

CALL TO A MOBILE STATION

The difference between making a cali to a mobile subscriber and a PSTN network subscriber is that the mobile subscriber’s location is unknown. Therefore, the mobile station must be paged before a connection can be madę. The steps in the cali setup procedurę from a PSTN subscriber to a mobile station are listed below. The numbers refer to figurę