GSM Prep test questions & answers 2024/2025
Global System for Mobile Communications (GSM) - ANSWERSWhat does the acronym GSM stand for?
BTS (Base Tranceiver Station
BSC (Base Station Controller) - ANSWERSWhich components make up the Base Station Subsystem?
1. Mobile-service Switching St...
Global System for Mobile Communications (GSM) - ANSWERSWhat does the acronym GSM stand for?
BTS (Base Tranceiver Station
BSC (Base Station Controller) - ANSWERSWhich components make up the Base Station Subsystem?
1. Mobile-service Switching Station (MSC)
2. Visitor Location Register (VLR)
3. Home Location Register (HLR)
4. Gateway Mobile-service Switching Station (GMSC)
5. Equipment Identity Register (EIR)
6. Authentication Center (AuC) - ANSWERSWhich components make up the Network Subsystem?
1. Serving GPRS Support Node (SGSN)
2. Gateway GPRS Support Node (GGSN) - ANSWERSWhich components make up the General Packet
Radio Service (GPRS)?
1. PSTN (voice)
2. PSDN (data) - ANSWERSWhich two sub-systems make up the NSS?
1. Mobile Station (i.e. phone)
2. IMEI - ANSWERSWhich components make up the Mobile Equipment (ME)?
1. Mobile Equipment (ME)
2. Subscriber Identity Module (SIM) - ANSWERSWhich components make up the Mobile Subscriber?
, 1. IMSI
2. MSISDN
3. Ki and ciphers (A3 and A8)
4. Pin, PUK
5. Forbidden and Preferred PLMNs
6. MSRN
7. TMSI
8. Last location info
9. Phone book - ANSWERSWhat information does the SIM store?
Mobile Equipment (ME) - ANSWERSName of a radio that can communicate with GSM networks?
International Mobile Equipment Identification (IMEI) number - ANSWERS15 digit number assigned to
each ME?
Enter *#06# into the phones dialer. - ANSWERSHow to quickly access an ME's IMEI?
1. Type Allocation Code (TAC) *
2. Final Assembly Code (FAC)
3. Serial Number (SN) *
4. Check Digit (CD) *
* After 2003 - ANSWERSComponents that make up the IMEI.
Type Allocation Code (TAC) - ANSWERSThe first 8 digits of the IMEI, which gives the make and models of
the phone.
- For handsets manufactured prior to 2003, the first 6 digits (Type Approval Code)
Final Assembly Code - ANSWERSThe following 2 digits after the TAC, used only for handsets prior to
2003.
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