Orascom Telecom, Mobilink, Regulatory affairs:

1) As a rough estimate by various international financial consultants, the current worth of Orascom Telecom is ………………………. billion US dollars.

2) OT’s latest venture w.r.t. network rollout is in which country?

3) “Weather Investments SPA” is the “parent company” of Orascom Telecom Holding (True/False)?

4) Network Operated in North Korea by OT is a 3G network (True/False)?

5) What are the brand name of OT’s networks in: Tunisia: North Korea: Algeria:

6) Mobilink Values are:

……………………., …………..……………..,……….……………..,…………..…………..,………………..…….

7) Give any three major activities done by Mobilink regarding Corporate Social Responsibility.

……………………………………………………………………………………………………………………………

8) Which departments come under “EAN”?

……………………………………………………………………………………………………………………..

9) The cost of allocated GSM spectrum to all CMOs in Pakistan is …………………million USD and this spectrum is allocated by PTA for ………………….years.

10) The names of Mobilink’s VP-Sales, VP-marketing and VP-Customer Services are:

…………………………………………………………………………………………………………………………

11) The MVNO license fees, recently announced by PTA is …………………………………..

12) Mobilink allocated DCS-1800 Frequency band in MHz is:

UL = ……………………………….. DL = ………………………….

13) Mobilink is using the microwave spectrum ranging: (select one) 12 GHz & 17 GHz

9 GHz & 14 GHz 18 GHz & 23 GHz

14) Following highways are “fully covered” by Mobilink (Yes/No): LHR-ISB Motorway GT Road Sehwan-Hyd highway Coastal highway National Highway Quetta-Taftan highway

15) Azad Jammu-Kashmir area is covered by Mobilink (True/False)?

16) “Infinity” is commercially launched in which cities?

17) Total span of Mobilink’s laid optical-fiber is approximately ……………………… km.

18) In the “No-Samjhota Project”, the team seizing the 1st position for most of the time is ……………region.

RF Propagation, Cell planning, Traffic engineering:

19) Free Space path loss depends on? (give any 3 major factors):

……………………………………………………………………………………………………………………………….

20) What is a Cross-polar antenna?

………………………………………………………………………………………………………………………………

21) 90 degree beam-width antennas are available and are supposed to cover better than 65 degrees beam-width, but why 65 degree antennas are preferred in our network.

22) If the maximum directivity (gain in the forward direction) of a directional antenna is 15 dB while its backward gain is 5 dB, the “Front-to-back ratio” of the antenna will be equal to ………………..……………….

23) The Universal Transverse Mercator (UTM) coordinate system is a grid-based method of specifying locations on the surface of the Earth that is a practical application of a 2-dimensional Cartesian coordinate system. Pakistan is situated in UTM zone number ……………………………

24) The World Geodetic System (WGS) is a standard for use in cartography, and navigation. Earlier schemes included WGS 72, WGS 66, and WGS 60. The latest revision is …………………………………

25) Suppose a cell’s traffic is “constant”. Based on a 30 minutes accumulation period, if it carries 50 Erlangs traffic, then based on a 60 minutes accumulation period, the traffic would be …………………..Erlangs.

26) A very simple “link-budget equation” for “MS-to-BTS” will be:

…………………………………………………………………………………………………………………………….

27) + 3 dB is 2 times bigger, then + 9 dB is ………………….. times bigger.

28) Zero dBm = ………….milli watt?

29) Mobilink is using “active repeaters” is indoor design (True/False)?

30) Polarization diversity gain is better in Open areas as compared to dense areas (True/False)?

31) If antenna gain is 15 dB and the transmitter power is 20 Watts. Then assuming zero losses in feeders/connectors, the ERP will be = …………………..

32) For PGSM band, LDF-550, 7/8 inch cable (commonly used as antenna feeder cables) has approximately a loss of …………………dB per 100 meters (0.5, 1, more than 3)

33) If you have to buy a latest “digital map data” for Karachi city, what should be the optimum “map data resolution” you would ask for?

NSS:

34) What is the “Busy Hour Call Attempt” per subscriber (BHCA) value on which our core network is designed? (select one):

1 for IN & 1.2 for MSC 1.2 for IN & 1 for MSC 1 for both IN & MSC.

35) “Inter-connect congestion” refers to the congestion across which nodes in the network?

36) Mobilink is using access class control in the SIMs (True/False)?

37) In Mobilink network, if a subscriber turns off his mobile (IMSI detach); and if he switches it on (being served by the same cell) after 6 hours, he will do a location-update or IMSI attach?

38) Periodic Location update is initiated by MSC or MS?

39) Periodic Location Update timer, set for our network is ………………. hours.

40) The EIR contains three lists of IMEIs in its database: White list, Grey list, and Black list. What do these three lists contain?

41) Authentication Centre is part of HLR or VLR?

42) You have an international roaming activated SIM. You land in a foreign country and switch on your mobile. Draw a very simple flow diagram to show LU/authentication process.

43) Technically, how a “Jazz-load” is different from the “scratch card” based recharge?

44) What is the purpose of a “Queuing Indication” message?

45) What is the function of an SMSC?

46) Mobile Station Roaming number (MSRN) is used in what kind of calls? select one: MOC MTC

Both

47) All A-ters of a BSC are tapped by Astellia to get the A-traces (True/False)?

48) Name any 3 “value added services”, offered by Mobilink.

………………………………………………………………………………………………………………………….

BSS:

49) Motorola Horizon-II cabinet has two SURF units (True/False)?

50) A GDP card in Motorola is installed in ………………………………………………………

51) The PCU functionality in ALU is performed by MFS….the abbreviation MFS stands for………………………

52) In Motorola BTS, one RSL on the Abis can carry ……………………….RTFs

53) Why usually - 48 volts is the supply voltage for majority of BSS/transmission equipment?

54) Please make a simple connection diagram for a GSM cell using: Two TRXs (single density), a 2:1 combiner a duplexer, and one single-band, two port antenna (TX/RX on each port) using polarization diversity.

Please clearly indicate the RX and TX paths.

55) SURF is the abbreviation for ………........................................................................................?

56) For a microwave transmission hop of less than 2 km, a BER value of ……………… is acceptable. (select one): 10-12

10-9

10-6

57) A “diplexer” is an active device that implements frequency domain multiplexing (True/False)?

58) Which could represent a practical VSWR value: 1 : 1.4 1.4 : 1

1 : 1

59) It is feasible to put a XCDR cabinet co-located with a BSC or with a MSC? Give reason for your answer.

60) A BSC can have a maximum of 16 C-7 links (True/False)?

61) Most of the gensets being used in Mobilink South network have a rating of ……………... kVA (9, 13, 27)

62) What is the function of a SUMA card in ALU BTS?

RF Optimization:

63) These days, the busy hour traffic for KHI city is around ……………….Erlgs and the BH time is …………………

64) Path Balance = 120 means UL is (weaker/stronger) than DL?

65) As a recommended practice, what should be the relationship between T3109 and Radio Link Timeout?

66) “BSS drops” in ALU consists of:

…………………………………………………………………………………………………………………………

67) A “Location Update” is a DTAP or BSS-MAP message?

68) Cell A and B are overlapping and are located across a location area border. There is 80% LUs from A to B, but zero Location updates from B to A….what could be the reason?

……………………………………………………………………………………………………………………………..

69) Mobilink is currently using …………………………………encryption algorithm at air-interface.

70) Which modulation scheme is used by EDGE? (select one) GMSK A combination of GMSK and 8-PSK 8-PSK.

71) There are 100% handover failures from Cell A towards B. Assuming NO hardware issues or outage in any cell, what could be the possible reason(s)?

72) The counterpart of EDGE in 3G technology is HSDPA. Main difference between EDGE and HSDPA is that EDGE currently does not have the provision for ……………………………………………..

73) How many coding schemes are used in: GPRS? EDGE?

74) Which of the below mentioned AMR codecs are NOT being used in Mobilink network?

75) A SABm is a layer 3 message (True/False).

76) EFR data rate is ………..Kbps.

77) The last PGSM carrier (ARFCN 124) in downlink is centered at 959.9 MHz (True/False).

78) A “CM service request” is the first message, exchanged at the A-interface (True/False).

79) During a call, an SMS is received by utilizing which logical channel?

80) A ‘CM service request’ message contains:

……………………………………………………………………………………………..

81) In case of no network coverage from your operator, you can make an “emergency call” on a different operator’s network (True/False)?

82) During a mobile originated call, which Layer-3 message communicates the “called party number” from MS to BSS/MSC?

……………………………………………………………………………………….

83) The parameter for multiband_reporting works for both idle and dedicated mode (True/False)

84) Assume that two cells A and B are being received at equal Rx levels (say -70 dBm). If Rxlev_access_min for A is -102 dBm and for B is -100 dBm, then C1 for A will be higher than B (True/False)?

85) In which scenario we would like to keep “Penalty time” value equal to 31?

86) In a “non-combined” CCH configuration, if number of AGCH blocks reserved = 2 blocks, then the corresponding number of PCH blocks will be = ……………………………..

87) AGCH blocks reserved = “zero blocks” is a permissible value (True/False).

88) Collision of RACHs on air-interface is avoided by the combination of which database parameters?

……………………………………………………………………………………………………………………..

89) Layer-3 message “Handover Required” is sent from which entity to which?

……………………………………………………………………………………………………………………..

90) In Motorola, when is a MA_cmd_to_MS statistic pegged?

……………………………………………………………………………………………………………………………..

91) Which layer-3 message is received by MS in response to a “Handover access burst”?

……………………………………………………………….........................................................

92) The condition that must be met for a PBGT handover (w.r.t. handover margin) is:

………………………………………………………………………………………………………….

93) What are the names of TCH congestion removal techniques in ALU BSS?

94) Take a case of a concentric cell with BCCH=GSM and Inner zone=DCS. If the MS (in dedicated mode) is in the inner zone of that cell, then it will report the DCS signal strength in the measurement report. How does the BSS then know about the signal strength of its BCCH channel in:

Motorola BSS? ALU BSS?

95) The interface between the BSS and SGSN is called ……………interface.

96) If paging is done using TMSI, then how many pages can be packed in one paging group?........................

97) The handover performed in the below mentioned trace is what kind of handover: Intra-BSC or Inter-BSC? Give justification for your answer.

98) What is the purpose of defining different interference-band values?

99) In Motorola, the “SDCCH_need_high_water_mark” value determines the number of free SDs remaining before initiating the TCH to SD dynamic reconfiguration (True/False)?

100) How many types of intra-cell handovers take place in our network?

……………………………………………………………………………………………………………………….

101) If u_rxqual_dl_p = 0, & l_rxqual_dl_p = 4, then an optimum value for the parameter l_rxqual_dl_h should be = ………………………………..

102) A PBGT HO is preferred over an Uplink Level HO in handover priority (True/False)?

103) If we need to minimize the LU attempts from Cell A towards cell B, what could be possible action item(s)?

………………………………………………………………………………………………………………………………

104) dBm is an abbreviation for the power ratio in decibels (dB) of the measured power referenced to one milliwatt……………(True/False)?

105) If a subscriber accesses a cell from a very close proximity, what could be the possible technique(s) for quickly reducing the MS power in:Mot?ALU?

………………………………………………………………………………………………………………………………..

106) Why it is recommended to keep RLT higher for AMR activated cells?

…………………………………………………………………………………………………………………………….

107) What are the main “contents” of a power budget handover equation?

…………………………………………………………………………………………………………………………….

108) In a dual band network, exchange of “Class Mark 3” info at air-interface and A-interface is very important. Why?

109) What is the difference in averaging mechanism for RxLev in Motorola and ALU BSS?

110) Equation for handover per call on cell level is =