International Journal of Research in Electronics & Communication Technology (IJRECT)
The Mobile Station ISDN number (MSISDN) uniquely identifies a mobile telephone subscription in the PSTN numbering plan. Network identities are numbers that a GSM network uses to locate a mobile subscriber when it is establishing a call to that subscriber. As the network relies on these identities to route calls to subscribers, it is important that each identity is unique and correct. Here, the authors study the various network identities involved both at the subscriber's end as well at the service provider end.