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TNG CNG TY VIN THNG QUN ICNG TY VIN THNG VIETTELCNG HO X HI CH NGHA VIT NAM

c lp - T do - Hnh phc

B NGN HNG CU HI N TP THI NNG LNG

I. M T CNG VIC 10II. KIN THC CHUYN MN NGHIP V:A. Trc nghim

CuNi dung cu hi

Mc

Cu 1GSM l vit tt caA. Global System for Mobile TechnologyB. Global System for Mobile CommunicationsC. Global Shared MemoryD. General System for Mobile CommunicationsB

1

Cu 2Tn s lm vic ca h thng GSM l:a) 800 v 1800 Mhzb) 800, 900, 1800 v 1900 Mhzc) 900, 1800, 1900 Mhzd) 900, 1800 MHzb2

Cu 3Mt knh sng mang GSM c rnga) 200 KHz.b) 45 MHz.c) 200 MHz.d) 35 MHz.a2

Cu 4iu ch trong GSM la. QPSKb. 64QAMc. GMSKd. PSKc2

Cu 5K thut truy nhp trong GSM?A. TDMAB. FDMAC. CDMAD. A v B.d1

Cu 6Bng tn s dng ca P-GSM 900 ng ln l:a) 890-915 Mhz.b) 890-960 Mhzc) 935-960 Mhz.d) 900-925 Mhz.a1

Cu 7Bng tn s dng ca P-GSM 900 ng xung:a) 890-915 Mhz.b) 890-960 Mhzc) 935-960 Mhz.d) 900-925 Mhz.c1

Cu 8Bng tn s dng ca GSM 1800 ng ln l:a) 1710-1785 Mhz.b) 1805-1850 Mhz.c) 1700-1750 Mhzd) 1805-1880 Mhza2

Cu 9Bng tn s dng ca GSM 1800 ng xung:a) 1710-1785 Mhz.b) 1805-1850 Mhz.c) 1700-1750 Mhzd) 1805-1880 Mhzd2

Cu 10Khong cch gia tn s ng ln v tn s ng xung trong GSM 900 l bao nhiu ? a, 25 MHz b, 35 MHz c, 45 MHz d, 95 MHz c1

Cu 11Khong cch gia tn s ng ln v tn s ng xung trong GSM1800 l bao nhiu ? a, 35 MHz b, 45 MHz c, 90 MHz d, 95 MHz d1

Cu 12S knh trong bng tn GSM1800 la) 124.b) 243.c) 364.d) 374.d1

Cu 13S knh trong bng tn GSM900 la) 32b) 64c) 124d) 128c1

Cu 14Vic m ha thoi c thc hin u:a) MS v TRC.b) BSC v TRC.c) MSC v MSd) Tt c u saia1

Cu 15Giao thc kt ni gia MS v BTS s dng giao thc bo hiua) MAP.b) LAPDm.c) LAPD.d) BSSAP.b2

Cu 16Giao thc kt ni gia BSC v MSC s dng giao thc bo hiua) MAP.b) ISUP.c) LAPD.d) BSSAP.d2

Cu 17Chuyn mch knh thoi trong thng tin di ng c thc hin tia) BSC.b) HLR.c) MSC.d) BTS.c1

Cu 18Chc nng chnh ca BSCa) Qun l ti nguyn v tuyn.b) Bo hiu v pha MSC v BTS.c) Gim st, bo dng.d) Tt c chc nng trn.d1

Cu 19Mt TRE khi pht sng ch bnh thng (Fullrate) c th p ng ti a bao nhiu cuc gi ng thi:a) 4b) 6c) 8d) 10c1

Cu 20Mt lung E1 c bao nhiu TimeSlota) 8b) 32c) 64d) 128b1

Cu 21Loi lung truyn dn c bn s dng cho vic kt ni t BTS v BSC l g ? a. T1 b. E1 c. STM1 d. FEb1

Cu 22Mt lung STM1 bng bao nhiu lung E1 ? a. 32 b. 31 c. 64 d. 63 d1

Cu 23Cng ngh GPRS thuc th h noa) 2G.b) 2.5G.c) 2.75G.d) 3G.b1

Cu 24Khi MS i ra khi vng ph sng ri quay li vng ph sng c m cha ht thi gian update nha) LU nh k.b) LU attach/detach.c) LU nomal.d) Khng lm g c.d3

Cu 25Cc MS thuc vng no s cng nhn c bn tin paginga) MS cng MSC.b) MS cng CI.c) MS cng LAC.d) MS cng BSC.c3

Cu 26Cc phn t chnh trong mng di ng gm c:a) BTS, BSC, MSCb) BTS, BSC, TRAU, PCU, MSC/VLR, HLRc) BTS, BSC, TRAU, PCU,MSC/VLR, HLR,Truyn dn.d) BTS,BSC,PCU,HLR,MSC/VLR.b1

Cu 27Giao din gia BTS v BSC c gi l giao din ga) Giao din Aterb) Giao din Abisc) Giao din Ad) Giao din Atermuxb1

Cu 28Giao din gia MS v BTS c gi l giao din ga) Giao din Umb) Giao din Abisc) Giao din Ad) Giao din RSLa1

Cu 29Giao din gia BSC v TC c gi l giao din g a) Giao din Aterb) Giao din Abisc) Giao din Ad) Giao din Atermuxd2

Cu 30Giao din gia TC v MSC c gi l giao din g a) Giao din Aterb) Giao din Abisc) Giao din Ad) Giao din Atermuxa2

Cu 31Mc ch ca vic thu phn tp l g:a) thu c tn hiu tt hnb) tit kim cng sut thu/pht ca BTSc) tit kim cng sut thu/pht ca MSd) Tt c u nga1

Cu 32Tc ca knh Haft Rate (Bn tc) l bao nhiu? a. 6,5Kbps b. 10Kbps c. 6,7Kbps d. 13Kbpsa2

Cu 33Tc ca knh Full Rate (Ton tc) l bao nhiu? a. 6,5Kbps b. 10Kbps c. 6,7Kbps d. 13Kbpsd2

Cu 34BTS kt ni trc tip na) BSCb) TRAUc) PCUd) MSCa1

Cu 35BTS kt ni vi BSC c th dng cc loi truyn dn no a) Vibab) Quangc) V tinhd) Tt c u ngd1

Cu 36Mt trm thu pht sng (BTS) cu hnh 2/2/2 hot ng ch Full Rate, mi sector ch khai ring 1 timeslot (TS) dng cho SDCCH. Cng lc BTS ny c th phc v cho:a) 48 thu baob) 47 thu baoc) 45 thu baod) 42 thu baoc1

Cu 37Trong khung PCM giao din Abis, tn hiu O&M thng c khai bo trn timeslot no?a. 0b. 16c. 30d. 31d1

Cu 38Lung vu hi abis 2 c tc dnga. Gip share ti trn lung abis 1b. C tc dng d phng, khi lung abis 1 b li trm vn pht sng bnh thng.c. a, b u ngd. a, b u saib1

Cu 39Mt MS mun thc hin cuc gi th knh u tin MS s s dng la. RACHb. SDCCHc. TCHd. BCCHa3

Cu 40Trn khung PCM giao din Abis, vi mt BTS c cu hnh 4/4/4 th s timeslot s dng cho lu lng TCH ca tt c TRX la. 24b. 12c. 36c. 32a3

Cu 41Khi s dng b kt hp Combiner kt ni 2 TRX th cng sut pht ca cc TRX gim bao nhiu dBa. 1b. 3c. 1.5c. 2.5b2

Cu 42Tilt l g ? a, L hng ca anten, b, L cao treo anten c, L gc cp/ngng ca anten d, L kch thc ca antenc1

Cu 43 Azimuth l g ?a, L hng ca anten so vi phng Bc b, L cao treo anten c, L gc cp/ngng ca anten d, L kch thc ca antena1

Cu 44Viettel s dng bao nhiu tn s trong gii tn GSM900a) 39b) 40c) 41d) 42d2

Cu 45Chc nng chnh ca card thu pht TRX:a) iu ch v gii iu ch cao tnb) iu khin lung truyn dn ti trmc) Lu cu hnh ca trmd) Khng c chc nng no k trna1

Cu 46Trm BTS ang s dng bao nhiu cnh bo ngoi:a) 3b) 5c) 8d) 16b1

Cu 47Khong cch (m) ln nht t trm BTS n trng hc trin khai EDGE trng hc:a) 200b) 300c) 400d) 500d1

Cu 48Mc thu (dBm) ti thiu cho php trin khai EDGE trng hc la) -58b) -68c) -78d) -88c1

Cu 49Mc ch downtilt anten la) Tng mc thub) Tng vng phc) Gim mc thud) Gim vng phd1

Cu 50Gc tilt in ca anten Katerin 739636 la) 0b) 3c) 6d) 9c1

Cu 51Vng ph 1 trm BTS ph thuc vo yu t no sau ya) Bn knh antena.b) Di tn s dng.c) Cng sut pht.d) C ba yu t trn.d2

Cu 52Chc nng chnh ca TREa) iu ch v gii iu ch cao tnb) iu khin lung truyn dn ti trmc) Lu cu hnh ca trmd) Khng c chc nng no k trna2

Cu 53Chc nng chnh ca khi Duplexera) Kt ni vi anten v thu pht ng thib) Ghp/tch cc tn hiu t/ti TRE c) Thc hin thu phn tpd) Tt c cc chc nng trnd2

Cu 54Mc ch ca vic tng cu hnh trm BTS la) Tng vng phb) Tng dung lng phc vc) Tng mc thud) Tng lu lngb1

Cu 55Mc ch vic gim cu hnh trm BTS la) Gim dung lngb) Tng hiu sut s dng mngc) C 2 u ngd) Khng c cu ngc1

Cu 56Thng qua NOCpro, chng ta c th gim st c cc li no sau y ca trm BTS:a) Mt inb) Mt lungc) Hng phn cngd) Tt c cc li trnd1

Cu 57L do phi u ring cho trma) M rng dung lng trmb) D phng khi s c xy ra khng lm down trmc) Nng cao KPI ca trmd) Tt c mc ch trnb1

Cu 58Gi tr in tr t (Ohm) yu cu cho nh trm BTS khu vc ng bng l a) Next cho n khi xut hin nt Send SCF ti file cu hnh mi cho BTS)

+ Bc 5: Khai bo trn OMC

+ Bc 6: Kim tra trng thi hot ng ca card

+ Bc 7: Test cuc gi

+ Bc 8: Dn dp phng my, ghi y thng tin vo s theo di ti trm v cp nht kt qu nng cp cho CR nng cp.

7. ng ch hy trnh by cng tc chun b v nu cc bc thc hin gim cp thit b BTS Alcatel (hoc Nokia) ti trm ? (Mc 1)

i vi thit b BTS Alcatel cn nu c nhng bc chnh sau:

- Chun b

+ Dng c: gm my tnh, cp kt ni my tnh, c l, m lch, vt nh dp, b lc gic ..

+ Bng yu cu gim cp (CR gim cp)

- Cng tc phi hp:

+ NV gim cp phi thng bo cho b phn trc OMC-R trc khi tin hnh gim cp ti mi trm.

- Cc bc thc hin:

+ Bc 1: Kt ni my tnh vo t BTS.

+ Bc 2: Xc nh v tr TRE cn gim cp (Vo mc Sector Mapping (hoc nhn F5) xc nh chnh xc v tr tng ANC v cc TRE cho mi Sector)

+ Bc 3: Disable TRE trn Sector cn gim cp (Vo mc Cmd/ SBL Management, trong mc SBL Selection: chn TRE cn gim cp v chn Disable)

+ Bc 4: Tho TRE ra khi BTS

+ Bc 5: Thc hin thao tc Modify HW Configuration thay i cu hnh mi (Vo CMD/ Remove module(s) v chn TRE cn Remove trong mc Select Module(s) to remove, sau chn Remove)

+ Bc 6: Kt thc hiu chnh (chn Cmd/End Modification of HW Config)

+ Bc 7: Xa d liu trn BSC (bo cho nhn vin trc OMC xa )

+ Bc 8: Kt thc (Kim tra cnh bo v tng th trng thi hot ng BTS, dn dp phng my, ghi y thng tin vo s theo di ti trm v cp nht kt qu gim cp cho CR gim cp).

i vi thit b BTS Nokia cn nu c nhng bc chnh sau:

- Chun b

+ Dng c: gm my tnh, cp kt ni my tnh, c l, m lch, vt nh dp, b lc gic ..

+ Bng yu cu gim cp (CR gim cp)

- Cng tc phi hp:

+ NV gim cp phi thng bo cho b phn trc OMC-R trc khi tin hnh gim cp ti mi trm.

- Cc bc thc hin:

+ Bc 1: Xc nh sector cn gim cp

+ Bc 2: Kt ni my tnh vo BTS

+ Bc 3: Tt TRE cn gim cp

+ Bc 4: Tho TRE

+ Bc 5: Ti file cu hnh mi cho BTS (Vo Menu: Commisioning Wizard: chn Change Settings Manually -> Next -> Next -> Specify From File Chn file cu hnh ph hp cho cu hnh mi -> Next cho n khi xut hin nt Send SCF ti file cu hnh mi cho BTS).

+ Bc 6: Xa khai bo trn BSC (bo cho nhn vin trc OMC xa)

+ Bc 7: Kt thc (kim tra cnh bo v tng th trng thi hot ng BTS, dn dp phng my, ghi y thng tin vo s theo di ti trm v cp nht kt qu gim cp cho CR gim cp)

8. ng ch hy trnh by cng tc chun b v nu cc bc thc hin thay card TRE cho trm BTS Alcatel (hoc Nokia) ti trm? (Mc 1)

i vi thit b BTS Alcatel cn nu c nhng bc chnh sau:

- Chun b

+ Dng c: gm my tnh, cp kt ni my tnh, c l, m lch, vt nh dp, b lc gic ..

+ D liu: CR yu cu thay card hoc thay card do c cnh bo li phn cng

+ Thit b: TRE ng theo yu cu (ch loi TRE 1800 hay 900), cp

- Cng tc phi hp:

+ NV ti trm thay card phi thng bo cho b phn trc OMC-R trc khi tin hnh thay

- Cc bc thc hin:

+ Bc 1: Kt ni my tnh vo t BTS

+ Bc 2: Xc nh v tr TRE cn thay

+ Bc 3: Lock TRE cn thay

+ Bc 4: Tin hnh thay TRE v Unlock TRE

+ Bc 5: Kim tra trng thi hot ng ca TRE va thay v ton b BTS.

+ Bc 6: Test cuc gi trn card va thay

+ Bc 7: Ghi li s seri ca card li v cp nht y thng tin vo bo co thay card.

i vi thit b BTS Nokia cn nu c nhng bc chnh sau:

- Chun b

+ Dng c: gm my tnh, cp kt ni my tnh, c l, m lch, vt nh dp, b lc gic ..

+ D liu: CR yu cu thay card hoc thay card do c cnh bo li phn cng

+ Thit b: TRE ng theo yu cu (ch loi TRE 1800 hay 900), cp

- Cng tc phi hp:

+ NV ti trm thay card phi thng bo cho b phn trc OMC-R trc khi tin hnh thay

- Cc bc thc hin:

+ Bc 1: Kt ni my tnh vo t BTS

+ Bc 2: Xc nh v tr TRE cn thay.

+ Bc 3: Lock TRE cn thay li nu TRE cn hot ng

+ Bc 4: Tin hnh thay TRE v Unlock TRE

+ Bc 5: Kim tra trng thi hot ng ca TRE va thay v ton b BTS.

+ Bc 6: Test cuc gi trn card va thay

+ Bc 7: Ghi li s seri ca card li v cp nht y thng tin vo bo co thay card.9. /c hy nu v trnh by chc nng ca cc khi card chnh trong BTS Alcatel (hoc Nokia)? (Mc 1)

+Nokia:

System module (ESMA)

Chc nng :

ESMA gi d liu tn hiu v ngi dng n DTRX

ESMA l 01 module trong Flexi EDGE BTS cung cp giao din cho mng truyn dn.

Hot ng nh 01 ng lin kt thng tin gia cc DTRX. System module h tr ti 06 DTRX module. DTRX module kt ni n system module thng qua mt Ethernet Switch trong system module.

ESMA kt ni giao din Abis.

ESMA lu tr phn mm hot ng, np cho cc module khc khi ng.

ESMA x l cc chc nng O&M ca Base Station.

Phn phi ngun.

X l cnh bo, tt c lu lng gia System module v cc DTRX l Gigabit Ethernet.

ng b.

Dual TRX Module (EXxA)

Dual TRX Module (DTRX) lkhi TRX 02 sng mang. Module gm 02 bng gc chung(02 sng mang) v phn RF ring r cho b thu (chui pht v thu) v khng gian cho 02 b kt hp bng rng tu chn (WBC)

Dual duplexer Module (ERxA)

Chc nng :

Kt hp (hay phn chia) tn hiu TX v RX.

B lc pht x t TX n Antenna connector

B lc tn hiu RX u vo t antenna ti RX connector

Khuch i v phn chia cc tnh hiu RX

Chc nng Loop TRX

Cung cp cng sut cho Masthead Amplifier (MHA)

Gim st VSWR (hay mt mt hi return loss)

Wide Band Combiner (WBC)

- Ghp tn hiu hng pht

- Ghp thm TRX (vo EXxA)

- Khuch i cng sut pht

+ Alcatel:

SUMA

TRE

ANC

EACB (XIBM)10. /c hy nu cc bc thc hin UCTT ti trm i vi b tp trung thu bao PSTN? (Mc 4)

Bc 1 : n trm kim tra

Trc khi n trm, NVKT cn chun b y dng c v thit b d phng bao gm:

+ Dao bn dy krone, km ct, ng h o in,

+ Card ngun, Card iu khin, card thu bao d phng thay th trong trng hp c card b li,

Bc 2: Kim tra cc kt ni, quan st v theo di trng thi ca cc n bo trn card

1 Kim tra cc kt ni

Kim tra cc kt ni sau:

Kt ni ca cp ngun

Kt ni ca cp lung

Kt ni ca cp thu bao

Kt ni link gia cc Card

Cp tip a

2 Quan st trng thi cc n bo trn card

2.1 i vi thit b ca ZTE

Cn quan st n bo trn cc card: POWA, PMSP, SPI, ASLC, MTT

2.2 i vi thit b ca Huawei

Cn quan st n bo trn cc card: PWX, RSP, ASLC, TSS

Bc 3: Xc nh nguyn nhn gy li

Theo di trng thi ca n trn card, kim tra tn hiu t line in thoi ca khch hng, theo phn nh ca khch hng n callcenter, theo kt qu test ng dy thu bao ca tng i. Xc nh v tr li v nguyn nhn gy ra li.

Bc 4: Phi hp x l li

Cc li lin quan n lung truyn dn: phi hp vi truyn dn v tng i x l, cc bc thc hin nh sau:

Loop lung truyn dn li, yu cu truyn dn v tng i kim tra

Kim tra li cp lung, phin bn krone, u RJ45

Thay cp lung, bn li cp (thay phin krone nu khng m bo)

Yu cu truyn dn i sang lung mi nu lung b li

Yu cu tng i i sang lung PCM mi nu lung b li

Cc li lin quan n phn cng thit b ZTE - xem ph lc 1

Cc li lin quan n phn cng ca thit b Huawei - xem ph lc 2

Bc 5: Kim tra kt qu

Yu cu trc tng i kim tra li cc kt ni intra-module, test ng dy thu bao, gi th, kim tra li trng thi ca cc n bo trn card xc nh li c khc phc.

Bc 6: Kt thc11. /c hy nu cc trng thi n ca card RSP v cc bc thc hin khi card RSP gp bt thng i vi b tp trung thu bao ca Huawei (Mc 3)

RSP dng kt ni b tp trung thu bao xa vi tng i AM/CM hoc RSM, ESM, thc hin cc chc nng tp trung, x l v chuyn mch cc thu bao thuc Honet, RIM352, RIM604

Mt trc ca Card PMSP nh sau:

Cc n trn card RSP:

Tn nMuM t nghaTrng thi bnh thng

RUNRedHin thNhy nhanh: Card hot ng bt thng

Nhy chm: Card hot ng bnh thngNhy chm

AIDGreenON: Mutual-aid tn ti gia card vi card i lp

OFF: khng tn ti Mutual-aid OFF

CLKGreenClock ActiveON: Card cung cp Clock cho h thng

OFF: Card khng cung cp Clock cho h thng

LINK1GreenTrng thi linkON: Card trao i vi thit b lp trn bnh thng

OFF: Card trao i vi thit b lp trn khng bnh thngON

LINK2Greend phngOFF

E11 E14Greentrng thi lung E1ON: lung khng tt

OFF: lung ttOFF

Ch :

Khi thit b hot ng bnh thng, n E11 tt, Link1 sng

Cc bc thc hin khi card RSP gp bt thng Xem n RUN trn card c sng khng, OK

Xem n E11 sng hay tt, nu sng th lung mt, phi hp truyn dn xem lung mt ti u? nu mt ti trm th kim tra li dy lung v bn li, OK

Kim tra trang thi ca n LINK1, nu Not OK

Reset li card (Rt ra cm li) NOK

Thay card mi, OK kt thc.

12. /c hy nu cc trng thi n ca card ASLC v cc bc thc hin khi card ASLC gp bt thng i vi b tp trung thu bao ca Huawei (Mc 3)

ASLC cung cp 32/16 line thu bao tng t, cung cp cc chc nng BORSCHT.

Mt trc ca card ASLC nh sau:

Cc n trn card ASLC:Tn nMuM t nghaTrng thi bnh thng

RUNRedch hot ng ca cardNhy chm: Card hot ng bnh thng

Nhy nhanh: ang load cu hnh cho card

ON, OFF: Card b liNhy chm

BSYLRedch hot ng ca cardON: t nht c line ang bn

Cc bc thc hin khi card ASLC gp bt thng:

Khi card ASLC gp bt thng gy nn cc li n thu bao nh: si, r khi m thoi, li port trn card ASLC, nhiu xuyn m gia cc thu bao (c th do phn ngoi vi), gi n thu bao khng chung,

Kim tra cc card lin quan nh POWA, SP, PMSP, SPI; OK

Lin h vi tng i kim tra li cu hnh phn cng; OK

Kim tra li cp thu bao pha sau cm ng v tr v chc chn; OK

Reset li Card ( bng cch rt ra cm li) NOK

Thay card mi, NOK

Kim tra Backplane (c th Backplane b li), xut thay i Backplane.

13. Board ASL/ASL32 trong thit b Huawei c chc nng BORSCHT. Hy gii thch tng ch vit tt vi chc nng v ngha ca n l g? (Mc 3)

B :Battery cp ngun 20mA 100mA , p -48V DC

OverVoltage : Bo v qu p

R: Ringing : Cp dng chung 75-80V, 20mA, tn s 20Hz

S : Supervisor : Gim st trng thi nhc, t t hpda vo trng thi mch vng ng dy thu bao.

C: Code thc hin qu trnh bin i A/D v D/A

H:Hybrid thc hin chuyn i tn hiu 2/4 dy v ngc li

T: Test kim tra trng thi ng dy thu bao.

14. DSLAM l g ? Hy k tn cc chng loi thit b DSLAM ang s dng ti CNKT ca /c? (Mc 1)

Tr li:

DSLAM (Digital Subscriber Line Access Multiplexer): thit b tp trung cc ng dy thu bao k thut s truy nhp a thnh phn. Thit b ny cung cp nhiu loi truy nhp dch v khc nhau nh: internet tc cao (xDSL), VoD, video multicasting, E-commerce, C mt s loi DSLAM hin ang s dng (tu theo tnh): DSLAM ATM: Huawei MA5105, Huawei MA5103 DSLAM IP: MA5303, MA5300, MA5605, ECI SAM960, ECI M41, Zyxel IES5000, Zyxel IES100015. Hy k tn cc gi cc dch v ADSL hin ti Viettel ang cung cp cho Khch Hng v tc ca tng gi cc? (Mc 1)

Gi homen: download 1Mbps upload 512Kbps

Gi homee: download 1,5 Mbps upload 512Kbps

Gi homec: download 1,6 Mbps upload 512Kbps

Gi officec: download 1,6Mbps upload 640Kbps

Gi netc: download 2Mbps upload 640Kbps

Gi netplus: download 3Mbps upload 640Kbps

16. S khc nhau c bn gia h thng ADSL ATM v IP? (Mc 2)-ATM:S dng lung E1 kt ni t DSLAM ln Switch

Chuyn mch gi ATM t u modem ln ti ATM Switch, t ATM SW ln Bras l chuyn mch gi IP

- IP : S dng lung quang 1 Gbps t DSLAM ln Switch

Chuyn mch gi ATM t modem ln DSLAM. T DSLAM ln Bras l chuyn mch gi IP