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GSM Test Questions with Complete Solutions 2024/2025
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GSM Test Questions with Complete Solutions 2024/2025
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GSM Test Questions with CompleteSolutions 2024/2025
Network Architecture - ANSWERS(Reference Picture)
PLMN Code - ANSWERSEach PLMN has its own MCC and MNC combinations
Location Area - ANSWERSServiced by a single MSC & VLR. Each area assigned a LAC. Comprised of a
group of hundreds of BTSs, which are controlled by a single BSC. And a group of BSCs (5-10) that are
controlled by a single MSC/VLR.
Location Area Identification (LAI) - ANSWERS(10-11 Digits) Composed of MCC (3), MNC (2-3), & LAC (up
to 5)
Cell - ANSWERSThe area covered by a single BTS. May be a single sector or divided into multiple sectors.
(Up to 5 digits.)
Global Cell Identification (GCID) - ANSWERS15-16 Digits. Composed of 4 components: MCC (3), MNC
(Network providers can have multiple MNCs) (2-3), LAC (up to 5), and Cell ID (up to 5)
ARFCN - ANSWERSAlso called the "Channel number" or simply "Channel". A code that specifies a pair of
physical radio carriers used for transmission and reception in a land mobile radio system, one for the
uplink signal and one for the downlink signal.
Frequency Re-Utilization - ANSWERS(Freq Re-use) Network's only buy portions of the frequency
spectrum. Due to high cost they only buy what they need and re-use these channels as often as possible
avoiding any co-channel interference.
Air (Um) Interface - ANSWERSThe mobile analog to the U interface of ISDN (Integrated Services Digital
Network). It is how the MS talks to the BTS.
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