CGI - Cell Global Identity

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CGI   - MCC-MNC-LAC-CI

CGI (Cell Global Identity) is the global identity of the cell in the whole system. It is composed of four different parameters:
MCC - Mobile Country Code,
MNC - Mobile Network Code
LAC Location Area Code,
CI Cell Identity within the location area.

CGI is sent to the mobile station (MS) as a part of the system information message (GSM Rec. 04.08). The combination MCC-MNC-LAC is also known as the location area identity (LAI).

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