爱立信华中区技术支持交换试题

1、交换部分考题第一部分：客观题1、 自动DUMP备份到_AA、 RELFSW0B、 RELFSW1C、 RELFSW2D、 RELFSW32、 关于系统再启动下面说法不正确的是：BA、 系统小启动对已经在通话的用户没有影响B、 系统大启动清除所有的呼叫，包括半永久性连接C、 再启动+大启动清除所有的呼叫，包括半永久性连接，并重装系统软件D、 系统再启动可由硬件故障、软件故障或人机命令引起3、 备份文件RELFSWn由子文件构成，其中用于存储PS和RS的内容的是：DA、 R0B、 R1和R2C、 R3和R4D、 R54、 RE功能块是：AA、 只有中央软件的功能块B、 既有硬件也有软件的功能块C、

2、 是TCS中用于呼叫监视和协调的功能块5、 电缆信息在什么文件中可找到：DA、B-MODULEB、E-MODULEC、H-MODULED、C-MODULE6、 主CLM的标准控制值是多少？BA、 4096B、 2048C、 512D、 10247、 Which of the ISUP messages acknowledges the reception of all addressin information,required for routing a call?BA、 IAMB、 ACMC、 ANM8、 Which of the following is never a part of

3、the SCCP address?CA、 GLOBAL TITLEB、 DESTINATION POINT CODEC、 ORIGINATING TRANSACTON IDENTIFIER9、 What is the name of a functional entity that contains the CAMELservice logic to implement the operator specific services?AA、 gsmSCFB、 gsmSRFC、 gsmSSF10、 What is used to inform the gsmSCF about the servic

4、e logic it should apply for a call?CA、 MSISDNB、 IMSI C、 SERVICE KEY11、 What is the name of the operation ,generated by gsmSSF when a trigger is detected in the Basic Call State Model ,to request instructions from the gsmSCF？AA、 INITIAL DPB、 CONNECTC、 SEND CHARGING INFORMATION12、 During location upda

5、ting of a new subscriber in the MSC/VLR,which information is not sent from the HLR? cA、 the HLR addressB、 the MSISDNC、 the AUC address13、 What is the maximum number of signalling links that can be simultaneously handled by one Ericsson SIGNALING TERMINAL(ST-7) in RPG? CA、 1B、 2C、 414、 In which part

6、of the signal unit are ISUP messages sent? AA、 MSUB、 LSSUC、 FISU15、 Which layer in the OSI reference model is responsible for error-free point-to point communication?bA、 physical layerB、 data link layerC、 transport layer16、 What is the name of the common part of signalling System No.7 used by all Us

7、er Parts?aA、 Message Transfer PartB、 Mobile Application PartC、 Common Channel Signalling Subsystem17、 Which of the following provide routing functions for incoming calls to a GSM network?ca) EIRb) AUCc) GMSC18、 The _ temporarily stores information about the MS currently visiting its Service Area.aa)

8、 VLRb) HLRc) EIR19、 What is the interface between the MSC and BSC known as?aa) A-interfaceb) Abis-interfacec) B-interface20、 Which of this information is included in Bearer Capabilities (BC)?ca) Information on the type of service, such as speech or data transmission, required by a user.b) Authentica

9、tion Parameters, including IMSI numberc) Ciphering codes21、 How many basic service groups are there in GSM?aa) 6b) 12c) 922、 In which network element is the IMSI Detach and IMSI Attach information stored?ca) BSCb) HLRc) MSC/VLR23、 The Mobile Global Title (MGT) is devirated from _?ba) MSRNb) IMSIc) D

10、estination Point Code (DPC)24、 Which of the following contains a Type Approval Code (TAC)?ca) TMSIb) IMSIc) IMEI25、 Which three security functions are initiated during call set-up? aa) Authentication, IMEI Check Functions and Cipher-mode Set-upb) Authentication, IMSI Check and Subscription Checkc) C

11、ipher-mode Set-up, IMEI Check Functions and Subscription Check26、 What is checked during the Authentication process?aa) SIMb) IMEIc) MSISDN27、 Why is TMSI used?ba) As a temporary personal code to activate the MSb) For security reasonsc) For use with a rented mobile telephone28、 Timers are used for P

12、eriodic Location Updating. Where are these timers located?aa) In the MS and MSCb) In the MS and BSCc) In the BSC and MSC29、 When a mobile subscriber wants to change a supplementary service, for example, call forwarding unconditional, the MS has to signal to the_.ba) MSC/VLRb) HLRc) BSC30、 In line wi

13、th your knowledge, what are two main functional levels named under AXE platform?ca) ANZ&ANTb) AXD&ANXc) APZ&APT31、 What is the highest user rate supported by combining 14.4kbps Data Channel Coding with HSCSD in ERICSSON Exchange?ba) 38.4kbit/sb) 57.6kbit/sc) 64kbit/s32、 OSS is the Ericsson product f

14、or the centralized control of the GSM Network. OSS is based on the Ericsson family of management products:_ba) SMASb) TMOSc) GAS33、 What is the interface between the MSC/VLR and SGSN?aa) Gsb) Gnc) Gp34、 Which of the following is not part of the Switching System?ba) EIRb) BSCc) HLR35、 What informatio

15、n is checked by the EIR?ba) The subscriptionb) The telephonec) The subscriber category36、 Which of the following statements is true?aa) One LA can belong to several BSCsb) One LA can belong to several MSC/VLRsc) One LA is always handled by only one BSC37、 What is the name of the node calculating the

16、 encryption parameters?ba) Encryption Centerb) Authentication centerc) Ciphering Center38、 Which of the following is performed in the MSC/VLR?aa) Number analysisb) Locating and handoverc) Ciphering39、 Which of the following identity numbers is dialed when making a call to an MS?aa) MSISDNb) IMEIc) I

17、MSI40、 When is IMEI used?ba) When the subscription belongs to a rental phoneb) When it is necessary to identify the MS equipmentc) As a temporary personal code to be able to use the MS equipment41、 Unconditional Call Forwarding is handled in _ba) Current MSC/VLRb) GMSCc) HLR42、 Which node outputs ch

18、arging records?aa) MSC/VLRb) Billing centerc) BSC43、 Which node store the charging information when a subscriber is handovered to a new MSC/VLR?ca) GMSCb) New MSC/VLRc) Old MSC/VLR44、 Why is Periodic Registration performed?ba) To inform the network where the MS isb) To inform the network that the MS

19、 is attachedc) To page the MS45、 What protocol is used on the A-bis interface to ensure error-free transmission of signaling messages between the BSC and BTS? a) LAPDmb) MTPc) LAPD46、 What protocol in a GSM network is responsible for the communication between the CAMEL nodes?a a) CAPb) INAPc) MAP 47

20、、 In what situation is the MAP operation “Provide Roaming Number” used?aa) the HLR asks the MSC/VLR for the MSRNb) the GMSC asks the HLR for the MSRNc) neither (a) nor (b)48、 What is the name of the protocol used by the SGSN to communicate with the BSC in the GSM network?ca) MAPb) GTPc) BSSAP+49、 Wh

21、at is the name of the function, when GMSC ask the HLR about the current location of B-subscriber?aa) Roaming Interrogationb) Roaming Reroutingc) Roaming Redirection50、 Mark the following statements regarding the ERICSSON AXE control system as being true or false:1) The AXE control system is provided

22、 by a distributed processor structure. f2) The structure involves a central processor which performs complex tasks in real time. t3) Along with the central processor there are also a number of other processors which perform more complex tasks. f4) The processors are interconnected by means of buses.

23、 t51、 What information about the position of the mobile in idle mode is stored in the VLR?aa) Current location areab) Current cell c) Current MSC/VLR service area52、 At mobile to mobile call setup (subscriber A calls subscriber B)ba) Only the A subscribers HLR must be contactedb) Only the B subscrib

24、ers HLR must be contactedc) Both the A and the B subscribers HLRs must be contacted53、 Look at the sequence of authentication and encryption in the network.aa) Authentication must be firstb) Encryption must be firstc) The sequence is not important54、 The length indicator field in the MTP message is

25、aa) Used to indicate the type of signal unit and sometimes the number of octets carried by the signal unitb) Always used to indicate the length of a MSU, a LSSU or a FISUc) Perform error correction55、 With SCCP you can route signaling messages:ca) Only in one countryb) Only within one world zonec) I

26、n the whole world56、 SCCP is used in the network to exchange signaling messages:ba) Between BSC and MSC/VLR onlyb) Between BSC and MSC/VLR and between nodes in the Switching System c) Between nodes in the Switching System only57、 How many additional subscriber numbers can one mobile subscriber has?b

27、a) 12b) 16c) 18第二部分：主观题部分：58、 Give the sequence number that would appear in a call from a PSTN subscriber to a mobile subscriber. The GMSC routes the call to the MSC_c_ The MSC contacts the MS via the BSC and the BTS by sending a page request_e_ The BSC selects a traffic channel and then orders the

28、MS to tune to this traffic channel. The MS generates a ringing signal and when the subscriber answers the speech connection is stablished_g_ The PSTN subscriber dials the mobile subscribers number. The GMSC receives the call_a_ The MSC checks the VLR for the LA of the MS_d_ The MS responds_f_ The GM

29、SC queries the HLR for the information needed to route the call to the serving MSC/VLR_b_59、 During which type of calls is gateway functionality used? A call to an MS.60、 What is the maximum number of signaling links in one link set?1661、 Identify the nodes of a GSM network with which the HLR must c

30、ommunicate? (hint: 4 nodes)MSCVLRAUCGMSC62、 Match the following terms to the correct description:A) MS purge 21) The action of moving around and changingthe connection over the air interface.B) MS active 42) This function is used to inform the HLR thatthe VLR is about to remove a subscriberrecord fr

31、om the VLR.C) Location updating53) The MS does not answer paging messages,there is no contact between the MS and thenetwork.D) Roaming 14) When a call or call set up procedure istaking place.E) MS detached 35) The MS informs the network that it hasentered a new location area.63、 Match the mobile ide

32、ntity on the left with the most appropriate description on the right.A) MSISDN 21) Unique permanent identity used for identification ofsubscribers through the network and over the radio pathB) IMSI 12) Identifies a mobile telephone subscription in the PSTNnumbering planC) IMEI 63) Identifies individual cells within an LAD) RSZI 44) Identifies zones used in regional subscriptionsE) MSRN 75) Enables MSs to distinguish between differentneighboring base stationsF) CGI 36) Uniquely identifies MS equipmentG) BSIC 57) Temporary network identit