Báo cáo Alcatel

8/2/2019 Bo co Alcatel

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Bo co thc tp

Khoa in TVin Thng Page 1

I HC KHOA HC TNHINKHOA IN TVIN THNG

PHIU BO CO THC TP THC TNhm sinh vin thc tp:

1. H v tn sinh vin: Trn Xun Hong Nam/N: NamMSSV: 0820064

2. H v tn sinh vin: Nh Long Nam/N: NamMSSV: 0820089

Chuyn ngnh: Mng - Vin thng Kha: 2008

Thi gian thc tp thc t: tngy ./ ./ 2011 n ngy ././ 2011.Ni thc tp thc t: Cty in Thoi ng Thnh PhTT Chuyn Mch Truyn Dn v ng Cu Thng Tin i E10 Trng nh

12/11 Trng nh, P6, Qun 3, TP.HCM.

Ni dung thc tp, cng vic thc t:- Tm hiu h thng tng i Alcatel 1000E10.- n v khai thc v qun l thu bao.-

n vu ni thu bao.- Thu bao trung k.Kt qu thc tp:

- Hiu r hn nhng kin thc c hc ti trng.- Hc tp thm nhng kin thc, kinh nghim ca cc anh ch trong cng ty qua qu

trnh thc tp.- c thy cc thit bt tin ca h thng mng trong qu trnh hc.- Bit c m hnh hot ng thc t.- Hc hi kinh nghim lm vic trong cng ty.

Tp.H Ch Minh, ngy 20 thng 9 nm 2011Ngi bo co

(K tn v ghi h tn)


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TP ON BU CHNH VIN THNG VIT NAMCNG TY IN THOI NG THNH PH

PHIU NHN XT KT QU THC TP

H v tn CBHD thc tp:KS. NGUYN QUC HNG

C quan thc tp: Cty in Thoing Thnh Ph

Trung Tm Chuyn Mch Truyn Dn v ng Cu Thng Tin i E10Trng nh

a ch: 12/11 Trng nh, P6, Qun 3, TP.HCM.

in thoi: Fax: .

Email: ...Website: ..

Nhm sinh vin thc tp:

1. H v tn sinh vin: Trn Xun Hong Nam/N: NamMSSV: 0820064

2. H v tn sinh vin: Nh Long Nam/N: NamMSSV: 0820089

Chuyn ngnh: Mng - Vin thng Kha: 2008

Thi gian thc tp thc t: tngy 20/ 7/ 2011 n ngy 20/ 9/ 2011.


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1. Tinh thn lm k lut, thi lm vic: 4 im (Thc hin ni qui c quan, chp hnhgigic lm vic, thi giao tip, thc bo v ca cng, thi lm vic)

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2. Khnng chuyn mn, nghip v: 3 im (Khnng p ng nhu cu cng vic, tinthn cu tin, khnng xut sng kin trong cng vic)

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3. Kt qucng tc: 3 im (Mc hon thnh thnh cng vic).......................................................................................................................................

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4. Cc kin khc: 2 im (nu c).......................................................................................................................................

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5. im ngh: (Thang im 10).......................................................................................................................................

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Xc nhn ca c quan Cn bhng dn(K tn v ng du) (K tn v ghi r h tn)


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NHN XT CA CN BHNG DN:

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T.pHCh Minh, ngy.....thng....nm........


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LI CM N

Sau khong thi gian 2 thng thc tp ti Cng Ty VNPT TP.H Ch Minh ChiNhnh Pha ng chng em hc tp c rt nhiu iu hay v rt ra c nhiu kinhnghim cho bn thn.

Em xin gi li chn thnh cm n ti :

- Cng Ty VNPT TP.HCM to iu kin cho em hon thnh tt t thctp tt nghip ny

- Thy Bi Hu Ph Trng B mn Vin Thng v Mng Trng HKhoa Hc TNhin l cu ni em c th thc tp ti Cty- Anh Hng l ngi trc tip hng dn chng em, d anh lun rt bnrn nhnganh hng dn rt tn tnh em c th hon thnh tt cng vicc giao ti Cng ty- Cc anh (ch) Cng ty gip em trong qu trnh thc tp

Chng em xin chc Thy, anh Hng v tt c cc anh (ch) Cng ty lun vui vtrong cuc sng v thnh cng trong cng vic !


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Bo co thc tp


MC LC

LI CM N............................................................................................................. 5

PHN AGII THIU CHUNG ........................................................................... 10

I. Gii thiu vcng ty in thoi ng thnh ph ........................................ 10II. Lnh vc hot ng ...................................................................................... 10III. Nng lc hot ng ..................................................................................... 11IV. Cu trc t chc, nhn s ca cng ty in thoi ng thnh ph.............. 11

1. C cu t chc ....................................................................................... 112. Cc phng ban ....................................................................................... 11

PHN BNI DUNG TI .............................................................................. 12

Phn I: Cu trc mng vin thng ............................................................................ 12

I. Cu trc mng vin thng ........................................................................... 121. S khi ............................................................................................. 12

1.1.Thit b chuyn mch .................................................................... 121.2.Thit b truyn dn ........................................................................ 131.3. Mi trng truyn ........................................................................ 131.4.Thit bu cui ............................................................................ 13

2. Cu trc mng ....................................................................................... 132.1. Phn loi cu trc ......................................................................... 13

a.Mng mc li ......................................................................... 14b.Mng sao .................................................................................. 14c.Mng tng hp ......................................................................... 15d.Mng kn .................................................................................. 15e.Mng thang .............................................................................. 15

2.2.

Phn loi mng ............................................................................. 16a.Mng ni ht ............................................................................ 16b.Mng ng di ....................................................................... 16c.Mng quc t ........................................................................... 16

II. Mng vin thng ti thnh ph H Ch Minh ............................................. 16Phn II: Tng i Alcatel 1000E10 .......................................................................... 17


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I. S t chc ca tng i Alcatell 1000E10 ............................................. 171. V tr ...................................................................................................... 172. Nhng yu cu ca h thng ................................................................. 183. Mng ton cu ....................................................................................... 194. Giao tip ngoi ...................................................................................... 215. Cc dich v cung cp ............................................................................ 226. Cc c tnh tng qut .......................................................................... 22

II. Cu trc chc nng .................................................................................. 221. Cu trc tng qut ................................................................................. 222. Cu trc chc nng ca tng i OCB283 ........................................... 233. Cu trc phn mm ............................................................................... 24

3.1. B BT ........................................................................................... 243.2. B MCX ....................................................................................... 253.3. B URM ....................................................................................... 263.4. B ETA ........................................................................................ 273.5. Giao thc giao tip CCS7 v biu khin CCS7 ...................... 283.6. B MR .......................................................................................... 293.7. B TR ........................................................................................... 303.8. B TX ........................................................................................... 313.9. B GX .......................................................................................... 323.10.B MQ .......................................................................................... 333.11.Vng Communication Multiplex ................................................. 343.12.Khi OM ...................................................................................... 35

4. Cu trc phn cng ............................................................................... 364.1. n v kt ni chuyn mch chnh (SMX) .................................. 374.2. Trm a x l (SMA) ................................................................... 384.3. Trm thi gian c s(STS) .......................................................... 394.4. Trm iu khin chnh (SMC) ..................................................... 394.5. Trm iu khin thit b ph trSMA ......................................... 404.6. Trm iu khin trung k SMT .................................................... 414.7. Trm bo dng SMM ................................................................. 44

a.Mc ch ca trm iu dng SMM ...................................... 44b.V tr ca SMM ........................................................................ 44c.Cu trc, chc nng ca SMM ................................................ 44d.Cu trc phn cng .................................................................. 47

III. Qu trnh thit lp c bn cuc gi ............................................................. 47


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1. Cuc gi mi ......................................................................................... 482. Giai on mtone quay s v nhn s ................................................. 493. Ngng gi tone quay s ........................................................................ 504. Qu trnh phn tch v nhn ca b dch s .......................................... 515. Rung chung cho thu bao c gi .................................................... 526. Ngng pht tone chung ....................................................................... 537. Bt u tnh cc .................................................................................. 54

Phn III: n vu ni CSN .................................................................................. 55

I. V tr CSN .................................................................................................... 55II. Cc loi thu bao ca CSN .......................................................................... 56III. Chc nng ca CSN .................................................................................... 57

1. Chc nng ca biu khin s UCN .................................................. 572. Phn loi b tp trung CN..................................................................... 57

IV. Cu trc chc nng CSN ............................................................................. 581. Khi iu khin v kt ni UCX .......................................................... 58

1.1. Bng mch in TMQR ................................................................... 581.2. Bng mch in TPUCB .................................................................. 58

2. Bng mch in TMUC2M ...................................................................... 583. Cc bng mch in TCCS ....................................................................... 594. Coupler cung cp bo hiu HDLC bng TCCSSVCUT ................... 595. Coupler cung cp bo hiu s 7 bng TCCSSVC7 .......................... 596. Bng mch in TSUC ............................................................................. 607. Ma trn kt ni RCX ............................................................................. 608. Khi x l ph trGTA ....................................................................... 609. Ch hot ng t tr ca CSND ....................................................... 6110.Cc giao tip kt ni ............................................................................. 62

10.1.Giao tip gia CSND v OCB 283 .............................................. 6210.2.C sthi gian ............................................................................. 62

11.Giao tip gia CSNL v MCX ............................................................. 62V. Thit lp cuc gi ni ht trong CSN .......................................................... 63

1. Thu bao ch nhc my ........................................................................ 632. Nhn bn tin DEC trong UCN .............................................................. 633. Nhn bn tin BCL ................................................................................. 644. OCB nhn bn tin cuc gi mi ........................................................... 645. Yu cu thuc tnh ca thu bao ch gi .............................................. 65


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6. u ni mi quay s v cng nhn cuc gi mi................................. 657. Nhn cc con s quay s t thu bao ca CSN .................................... 658. Phn tch s nhn c ......................................................................... 66

8.1. Tin phn tch ............................................................................... 668.2. Phn tch hon ton cc con s .................................................... 669. Ngng pht con s ................................................................................ 66

10.Kim tra thu bao b gi ....................................................................... 6711.u ni hi m chung cho ch gi v chb gi nhc my ............... 6712.Thu bao b gi nhc my ..................................................................... 6713.CSN gim st thu bao .......................................................................... 6814.Gii phng cuc gi .............................................................................. 68

Phn IV: Thu bao trung k...................................................................................... 69

TI TIU THAM KHO ........................................................................................ 72


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PHN AGII THIU CHUNG

I. GII THIU VCNG TY IN THOI NG THNH PHCng ty in thoi ng Thnh Ph l mt Doanh nghip Nh nc (DNNN) trc

thuc Bu in TP.H Ch Minh, chnh thc hot ng t ngy 01/01/2003 theo quyt

nh s4351/Q-TCCB ngy 31/10/2002 ca Tng Cng ty Bu chnh Vin thng VitNam (VNPT).

CNG TY IN THOI NG THNH PHEast HoChiMinh City Telephone Company

a ch: 125 Hai B Trng, phng Bn Ngh, qun 1, TP.H Ch Minh, Vit Nam thoi: +84 (8) 9111888

Hotline: 0909 131 674Email: [email protected]: vnpt.divivu.com

II. LNH VC HOT NGLnh vc hot ng chnh yu ca Cng ty gm:

- cc dch v vin thoi cnh.-

Trung k tng i ni ht.- Knh thu ring - truyn s liu.- Dch v ISDN.- Dch vInternet bng rng MegaVNN.- Dch v mng ni mng MegaWAN.- Dch v truy nhp thbng rng MetroNet.
mailto:[email protected]://www.vnpt.divivu.com/http://www.vnpt.divivu.com/http://www.vnpt.divivu.com/mailto:[email protected]


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III. NNG LC HOT NG vng bc trn con ng pht trin v hi nhp, ngay t thi ku thnh lp,

Cng ty in thoi ng Thnh Ph quyt tm v thnh cng trong vic xy dngh thng qun l cht lng theo tiu chun ISO 9001:2000 v ng k bo h thng

hiu EHTC.

Tn ch hot ng ca cng ty l Hp tc cng pht trin Sthnh t ca khch

hng l s thnh cng ca cng ty.

Vi mt i ng chuyn vin, k thut gii, c nhiu kinh nghim, mt h tng kthut vin thng hin i bc nht, cng ty in thoi ng thnh ph cam kt h trtvn gii php ng dng vin thng min ph, cung cp dch v vin thng c cht lng

tt nht v chi ph hp l nht cho tt c khch hng c nhu cu trn a bn phc v.

IV. CU TRC T CHC, NHN S CA CNG TY IN THOING THNH PH

1. C cu t chcBan gim c cng ty gm Gim c v Ph Gim c

- Gim c: Ngi ng u cng ty do Vin thng thnh ph H Ch Minh bnhim. Gim c l ngi phtrch chung, iu hnh, lnh o ton b hot

ng sn xut kinh doanh ca cng ty- Ph gim c: Gip gim c iu hnh mt hoc mt slnh vc hot ng

ca n v,chu trch nhim v nhim vc phn cng. Cng ty hin c 3Ph gim c:

01 ph gim c ph trch kinh doanh.01 ph gim c ph trch k thut.01 ph gim c ph trch pht trin d n.

2. Cc phng ban- Phng hnh chnh tng hp.- Phng t chc cn blao ng.- Phng u t.- Phng k hoch.- Ban qun l d n.


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PHN BNI DUNG TI

PHN I - CU TRC MNG VIN THNG

I. Cu trc mng vin thng.

1. S khi:

Mng vin thng (MVT) l phng tin truyn thng tin tu pht, n uthu. Mng thu cung cp cc dch v cho khch hng. Cc thnh phn cu to nn MVTchia lm 3 loi chnh:

1.1. Thit b chuyn mch:Chuyn mch l khi to mt ng truyn dn gia bt kcc u cui no.

Chc nng ca thit b chuyn mch l nhm khi to cc ng truyn ny. Nhcthit b chuyn mch m ng truyn dn s c dng chung v mng c thc s dng mt cch kinh t.


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Thit b chuyn mch gm c tng i ni ht v tng i qu giang. Cc thubao c ni vo tng i ni ht, v tng i ni ht c ni vi tng i qugiang. Tng i qu giang ging nh l im kt ni cc tng i ni ht vi tngi qu giang. Tng i qu giang ging nh l im kt ni cc tng i ni ht.

1.2. Thit b truyn dn :Thit b truyn dn dng ni thit bu cui vi tng i, hay gia cc tng

i vi nhau thc hin truyn dn cc tn hiu in. Thit b truyn dn c thchia lm hai loi : thit b truyn dn pha thu bao v thit b truyn dn qu giang.

Thit b truyn dn pha thu bao dng mi trng truyn thng l cp kimloi, tuy nhin c mt s trng truyn mi trng truyn l cp quang hoc vtuyn. Cp quang c s dng cho cc thu bao c nhu cu truyn d liu tc

cao, cn v tuyn c dng cho nhng tuyn truyn dn c a hnh kh c th kocp c.

Thit b truyn dn qu giang c th dng h thng co quang, cp ng trc, viba, vtinh

1.3. Mi trng truyn:ng truyn hu tuyn : cp kim loi, cp quang.

ng truyn v tuyn : vi ba, v tinh.1.4. Thit bu cui : my in thoi, my Fax, my tnh, tng i PABX.

2. Cu trc mng.

Mng phi tha cc iu kin:

- Tin cy : c ng d phng.- Cht lng truyn dn : Tiu chun ha cc tham s v suy hao truyn

dn, nhiu, xuyn m u gn, xuyn m u xa, ting di, tp m, libit

- Hiu qu kinh t : Xy dng tuyn kt ni sao cho ngn nht.2.1. Phn loi cu trc:

C cc loi cu trc chnh : Mng mc li (im ni im), mng sao, mngtng hp (sao + mc li), mng vng kn (Loop), mng thang (Ladder).


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Bo co thc tp


a. Mng mc li:

L mng c cc ng kt ni ca tng cp tng i, c tng chiu di

ng truyn di nht, di mch gia tng cp tng i ngn nht.

u im : An ton, linh ng cao v khi c s c gia hai im van c thkt ni lin lc bng ng vng.

Nhc im :

Khi tng i ln th chi ph xy dng cc tuyn s ln.

- Hiu sut s dng mch thp i vi nhng tuyn c lu thoithp.

- Cu trc tng i phc tp.ng dng:

- Vng nh, t tng i.- Vng c ph chuyn mch ln hn ph truyn dn.- Lu thoi gia cc tng i ln.

b. Mng sao:

L mng dng tng i qu giang kt ni cuc gi gia cc tng i ni

ht. Tng i qu giang c thc phn lm hai loi da trn nhim v:- Tng i qu giang ni ht (Tandem).- Tng i qu giang ng di (Toll).


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Bo co thc tp


u im:

- Chi ph xy dng tuyn thp.- Hiu sut s dng mch cao.- Cu trc tng i n gin.

Nhc im:

- Khi tng i qu giang c s c th s nh hng n tonmng.

ng dng:

- Vng ln, c nhiu tng i nm ri rc.- Vng c ph chuyn truyn dn ln hn ph chuyn mch.

c. Mng tng hp:

y l mng tng hp gia sap v mc li, khi lu thoi gia cp tng ino , cao th cn phi xy dng thm ng kt ni trc tip gia cctng i nn l mng tng hp.

Khi lu thoi thp, cc cuc gi c kt ni qua tuyn trc tip.

Khi lu thoi cao, cc cuc gi c kt ni qua tuyn thay th.

d. Mng vng kn:

Mng c cc im thng tin kt ni vi nhau theo mng vng kn.


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u im:

- Tin cy bi v c hai ng kt ni kn.- Kinh t, d xy dng.

ng dng:

- Vng c di mch b gii hn bi suy hao truyn dn.- Thch hp vi mng bin gii hi o.

e. Mng thang:

L mng tng hp ca cc loi mng trn.

u im:

- Tin cy.- Tuyn truyn dn c bn.

ng dng: Vng tri di v hp.

2.2. Phn loi mng:Ty theo phm vi hot ng, mng c phn loi nh sau

a.Mng ni ht : Gm cc mng truy nhp, cc tng i ni ht, cc ngtrung k kt ni gia cc tng i ni ht, ng trung k kt ni gia tngi ni ht v tng i qu giang ng di.

b.Mng ng di : Gm cc ng trung k kt ni gia cc tng i qugiang ng di v cc tng i qu giang ng di.

c.Mng quc t : Gm cc ng trung k kt ni gia cc tng i qugiang quc t vi cc tng i qu giang quc t.

II. Mng vin thng ti thnh ph H Ch Minh.

Mng vin thng ti TP.HCM c phn thnh 4 cp:

- Chuyn mch qu giang quc t.- Chuyn mch qu giang ng di.


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- Chuyn mch qu ni ht.- Chuyn mch t xa.

Mch chuyn mch ti TP.HCM gm mt s loi sau: Mng Fixed, mng wireless,mng GSM, mng Callink, Trong mng Fixed chnh l h thng dnh cho ccthu bao cnh, gm mt s h thng chuyn mch nh: Alcatel, EWSD, TXD-

1B

7 i

ALCA

8 i

EWSD

1 i

WLTD

1 i

WLLTD

3 i

NEC

VTI

VTN VTN

EHTCLTJ

WHTCLTW

Mng ni ht

Tng i Gateway

Mng chuyn

mch nh


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Bo co thc tp


PHN II - TNG I ALCATEL 1000E10

I, S t chc ca tng i ALCATEL 1000E10.

3 2 2

1

1.V tr.Alcatel 1000 E10 l mt h thng chuyn mch sc trin khai bi cng tyAlcatel CIT. N phc v cho ton b phm vi ca cc trung tm, t trm chuyn

mch cc b nh nht cho n cc trm chuyn mch quc t ln hn. N thch nghi

vi mi mi trng, tmi trng thnh thng dn c cho n khu vc dn ctha tht, v i vi mi loi hnh kh hu t nhng khu vc hai bn cu cho nnhng vng kh hu m t v nng ca min Xch o Chu Phi v vng nhit i.H thng vn hnh v bo tr c tht ring l hoc c th kt hp chung vi mt

Auxiliaresand N07 :The SMA

Connection:The SMX,

LR and SAB

Auxiliaresand N07 :

The SMA

Communicatio:The token ring

CollectinsubcribeThe CSN

Operation andMaintenance:

The MMS

Time TheSTS

Control: The SMC

General Architecture

Role and

location

FHS

D

FHS

D

FHS

D

FHS

D

FHS

D

FunctionalHardwareSofware

Defence andmaintenance

Course organigram


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Bo co thc tp


vi trm chuyn mch, hoc ng thi c hai. Tng i Alcatel 1000 E10 trang b ttc modem truyn thng phc v : Basic Telephony, ISDN, Centrex, v mng vtuyn t ong s, v tt c mng thng minh. N iu khin tt c cc h thng tnhiu nhn trn 70 quc gia, v n c xy dng ph hp vi chun quc t. Cng

ty Alcatel CIT gp phn tch cc vo vic xc nh cc chun .

2. Nhng yu cu ca h thng.

- n v tuyn vng xa

- Chuyn mch thu bao cc b.

- Trm chuyn mch qu giang.

- Trm chuyn mch kt hp (cc b - qu giang).

- Trm chuyn mch Tandem.

- Trm Centrex.

S: B tp trung thu bao xa

L: Tngi ni ht

TR: Tngi chuyn tip

CID: Tngi quc t gi ra.


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Bo co thc tp


CIA: Tngi quc t gi vo.

CTI: Tngi chuyn tip quc t

3. Mng ton cu.

S pht trin ca Alcatel 1000 E10 l mt nhn t trong khi nim ca tngcng ty Alcatel CIT v mng ton cu. H thng mng Alcatel ton cu a ra mts phc v hon ho cho khc hng trong hin ti v tng lai.

H thng mng Alcatel ton cu bao gm mng in thoi v s pht trin ca

n hng n ISDN, mng d liu v dch v cng thm, mng thng minh, hthng mng v tuyn t ong, h thng mng vn hnh v bo tr. Cui cng, s pht

trin hng n ISDN bng rng s dng k thut truyn bt ng b (ATM).

S pht trin ny l ng mc ch chung ca tng cng ty Alcatel CIT. Nc h trbi cc modem, b xl thng tin a chc nng ALCATEL 8303, phn

mm linh hot, cu trc m.

Alcatel 1000

Alcatel 1100Alcatel 1400

Alcatel1400

Alcatel 900

ALCATEL1300

Alcatel 1000 E10

ISDN

Chuyn mch gi

Freecall mng thng

minh

Minitel videotext cc

dch v mng b xunggi tr

Vision conferencephng thc truyndn cn ng b bngthng ATM

TMN mng qun l

vin thngin thoi ding

Alcatel 1000


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Bo co thc tp


4. Giao tip ngoi.

Tuyn thu bao vi 2, 3, hoc 4 dy

ISDN c struy cp tc 144 kbit/s (2B+D)

ISDN tng hp truy cp tc 2Mbit/s (30B+D)

v : Chun PCM (2Mbit/s, 32 knh, giao thc CCITT G732).

v : Cc tuyn d liu tng t hoc s tc 64kbit/s hoc theo chunPCM

ng d liu s vi tc 64kbit/s (giao thc X25, Q3) hoc cc tuyn dliu tng t vi tc nhhn 19,2kbit/s (giao thc V24).

PABX: Tng i nhnh t ng ring (tng i c quan)

NT: u cui mng

ALCATEL1000 E10

Mng thoi knhkt hp

Mng sliu

Mng gia tng

gi tr

Mng iu hnh bodng

Mng bo hiu s7CCITT

NT

PABX

(5)4)

(1)

(2)

(3)(8)

(7)

(6)


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Bo co thc tp


5. Cc dch v cung cp.

Tng i OCB283 iu khin nhng cuc gi n mng chuyn mch cng

cng quc gia hay quc t. N cng c th truyn d liu gia cc thu bao ISDNcng tng tnh cc mng chuyn mch gi khc.

Cc cuc gi bao gm:

- Cuc gi ni ht.

- Cuc gi khu vc : i, n, hoc chuyn tip.

- Cuc gi trong nc : i, n, hoc chuyn tip.

- Cuc gi quc t : tng hoc bn tng, n hoc i.

- Cuc gi i cho dch vc bit.

- Cuc gi kim tra.

6. Cc c tnh tng qut.

c tnh ca nhiu h thng chuyn mch ph thuc rt ln vo mi trng(cuc gi hn hp, cc iu kin vn hnh). Dung lng x l cc i ca h thng

l 220 CA/S, dung lng lin kt ca ca mt trm chuyn mch ma trn ln n2048 PCM cho php:

- Ln n 25000 Erlangs.

- Ln n 200 000 thu bao.

- Ln n 60 000 trung k.

II. Cu trc chc nng.

1.Cu trc tng qut.H thng tng i Alcatel E10 c t trung tm ca h thng lin mng

vin thng. N c cu thnh tba n v c chc nng c lp:

- H thng b trph truy cp thu bao (Subcriber Access Subsystem), nh trcho vic kt ni gia cc tuyn thu bao s v analog.


23/73

Bo co thc tp


- H thng iu khin v k ni, n h trcho vic kt ni v x l cucgi.

- H thng vn hnh v bo tr, n chu trch nhim cho tt c cc chcnng cn thit cho vn hnh mng lin tc.

i vi mi chc nng c cu thnh vi cc phn mm tng thch cho

chc nng giao tip m n m trch.

2. Cu trc chc nng tng i OCB283.

Trong :

- NT: Kt cui s.

- PABX : Tngi tng c quan.

- Phn h xm nhp thu bao (Subcriber Access Subsystem) : u

ni thu bao tng t v s.


24/73

Bo co thc tp


- Phn hu ni viu khin (Connection and Control) :u ni v xl cuc gi.

- Phn h vn hnh v bo dng (Operation and maintainance) : H trmi chc nng cn thit cho iu hnh v bo dng.

- Telephone Network : Mngin thoi.

- Data Network : Mng s liu.

- Value added Network : Mng dch v h tr

- Operation and Maintainance Network : Mng vn hnh v bo dng.

3. Cu trc phn mm:

3.1. B BT (Time base):

BBT m bo thi gian phn phi cho b LR v bPCM ra sng b,n cng hot ng khi c sthay i xung clock.

CSNI

CSND

CSED

Ma trnchuynmch

chnhcom

URM

BT

eta pupe

trtxmrgxmqom pc

Mch vng thng tin (Tokenring)

Alar

LR

LR

Cc trung k

khng r

PGS


25/73

Bo co thc tp


Thi gian nh thi hoc c th t n pht sinh hoc ph thuc vo xung nhpbn ngoi.

3.2. B MCX (Host Switching Matrix).

B MCX c iu khin bi phn mm chc nng COM (matrix switchcontrollee).

Book MCX l mt ma trn lin kt vung mt tng thi gian n, T, song

cng. V c khnng ti 2048 ng (LR) kt ni.

Mt LR l mt ng PCM ni ti, vi 16 bit, trn mt knh (c 32 knh).

B MCX c th thc hin nh sau:

- Mt qu trnh lin kt gin tip gia mt knh vo v mt knh ra. N

cng c th c s kt ni ng thi bng vi sknh ra. N cng c th nhnhng ng kt ni chnh gia knh vo v knh ra.

- S lin kt gia mt vi knh vo v M knh ra.

CSNI

CSND

CSED

Ma trnchuynmchchnhcom

URM

BT

eta pupe

trtxmrgxmqom pc


Alar

LR

LR

Cc trung k

khng r

PGS


26/73

Bo co thc tp


- S lin kt gia N knh ng vo t mt cu trc khung ca a khungtrn N knh ng ra ca mt cu trc khung khc, s tn ti nguyn vn v tunt ca cc khung nhn c. Chc nng ny lin quan n s kt ni vi Nx64kbit/s.

3.3. B URM (PCM controller).

B URM cung cp giao din lm vic gia h thng chuyn mch ngoi PCM

vi tng i OCB283. Cc h thng chuyn mch ngoi PCM n t:

- Mt im thu bao truy cp s vng xa (CSN) hoc t mt v tinh tp

trung vng xa.

- Mt trung tm chuyn mch khc, tn hiu knh lin kt.

- Mt thit b thng bo ghi m s.

c bit URM h trnhng chc nng iu khin chnh sau:

CSNI

CSND

CSED

Ma trnchuyn

mchchnh

URM


Alarms

LR

LR

Cc trung k

khng r

PGS


27/73

Bo co thc tp


- Chuyn i giao thc HDB3 sang m nh phn (PCM -> matrix line)

- Chuyn i giao thc m nh phn sang HDB3 (matrix lne -> PCM).

- Trch ra v tin x l nhng tn hiu knh lin kt ca T.S16 (PCM ->

command).

- Truyn tn hiu knh lin kt trong T.S16 (command -> PCM).

3.4. B ETA (Auxilliary Equipment Manager).

B ETA h trcho:

- B pht tong (GTS)- Thit b pht v nhn tn s (RGF)- Mch hi ngh (CCFS)- Thay i xung clock

CSNI

CSNDCSED

Ma trnchuyn

mchchnhcom

URM

BT

eta pupe

trtxmrgxmqom pc


Alarms

LR

LR

Cc trung k

khng r

PGS


28/73

Bo co thc tp


LR

LR

LR

Time

3.5.Giao thc giao tip CCS7 (PU/PE) v biu khin CCS7 (PC).

kt ni knh tn hiu vi tc 64 Kbps, s kt ni bn thng trc c

thit lp theo ma trn lin kt cho PU/PE c th x l theo giao thc CITT No 7.

Chnh xc hn, b PU/PE h trnhng chc nng c thnh sau:

- X l mc hai knh tn hiu

CSNI

CSND

CSED

Ma trnchuynmch

chnhcom

URM

BT

eta pupe

trtxmrgxmqom pc


Alar

LR

LR

Cc trung k

khng r

PGS

E

T

A

GT

RGF

CCF

CLOCK


29/73

Bo co thc tp


- Chc nng nh tuyn tin nhnBiu khin PC h trnhng chc nng sau:

- Chc nng qun l mng- H trcho b PU/PE- Cc nhim v gim st khc khng trc tuyn n giao thc CCITTNo 7.

3.6. B MR (Call handler : Biu khin cuc gi).

B MR c nhim v thit lp v gii phng cuc gi.

Biu khin cuc gi dng gii quyt nhng nhim v cn thit cho

qu trnh x l thng tin trong thi gian nhn tn hiu, sau khi tra cu thu bao v

qun l d liu phn tch (b TR) nu cn thit. Biuu khin x l cuc gi mi,

x l treo my, gii phng thit bv iu khin ng ngt mch

Mt khc, biu khin cuc gi s chu trch nhim gim st cc qu trnh

qun l khc nh : kim tra mch, gim st tng quan.

CSNI

CSND

CSED

Ma trnchuynmch

chnhcom

URM

BT

eta pupe

trtxmrgxmqom pc


Alar

LR

LR

Cc trung k

khng r

PGS


30/73

Bo co thc tp


3.7. B TR (Translator).

B TR c chc nng h trqun l ca qu trnh phn tch, thu bao v nhm

d liu c smch. B TR h trcho qu trnh iu khin cuc gi, khi c yucu t chnh n, vi thu bao v c tnh mch cn thit thit lp hoc gii phng

thng tin. BTR cng c thm bo su kt hp gia nhn sv a ch ca nhm

mch hoc thu bao (tin phn tch, phn tch, chc nng chuyn dch) .

3.8. BTX (o lu lng v tnh gi cc cuc gi).

CSNI

CSND

CSED

Ma trnchuynmchchnhcom

URM

BT

eta pupe

trtxmrgxmqom pc


Alar

LR

LR

Cc trung k

khng r

PGS


31/73

Bo co thc tp


B TX c chc nng h trtnh cc thng tin.

BTX m trch v :

o Tnh tng gi cc mi cuc gi.o Lu trthng bo tnh cc ca mi thu bao c phc v bi trung

tm chuyn mch.

o Cung cp nhng thng tin cn thit cho ha n thanh ton, giao tipvi b OM.

Mt khc, b TX h trnhim v quan st mng li v thu bao.

3.9. B GX (Biu khin h thng cc ma trn)

CSNI

CSND

CSED

Ma trnchuynmch

chnhcomco

mURM

BTBT

etaet

pupep

trtrtxtxmrmrgxgxmqmqomom pcpc


Alar

LR

LR

Cc trung k

khng r

PGS


32/73

Bo co thc tp


Chc nng b GX l x l v h trqu trnh kt ni nhn c t:

- Yu cu kt ni hoc gii phng kt ni n t biu khin cuc gi(MR) hoc c chc nng phn phi tin nhn (MQ)

- Cc li kt ni tn hiu bi chc nng iu khin mch ma trn (COM)3.10. B MQ (Message distributor).

CSNI

CSND

CSED

Ma trnchuyn

mchchnhcom

URM

BT

eta pupe

trtxmrgxmqom pc


Alar

LR

LR

Cc trung k

khng r

PGS


33/73

Bo co thc tp


Chc nng b MQ l m trch qu trnh phn phi v nh dng tin nhn,

nhng ch yu n h trcho :

- Gim st cc kt ni bn cnh- Truyn tin nhn gia cc knh thng tin3.11. Vng Communication multiplex.

CSNI

CSND

CSED

Ma trnchuyn

mchchnhcom

URM

BT

eta pupe

trtxmrgxmqom pc


Alar

LR

LR

Cc trung k

khng r

PGS


34/73

Bo co thc tp


C mt n nm vng Communication multiplex c dng truyn bn tin

gia cc trm. S truyn tin nhn ny c h tr bi mt loi giao thc gi l

TOKENRING, giao thc ny hot ng ph hp vi chun IEEE 802.5.- Mt b ghp lin trm (MIS) c dng chuyn i gia nhng chc

nng iu khin vn hnh v bo tr phn mm.

- C t 1 n 4 trm truy cp a knh (MAS) cho cc qu trnh chuyn igia cc chc nng lin kt (URM, COM, ETA, PU/PE) v chc nng

iu khin.

3.12. Khi chc nng vn hnh v bo dng (OM).

CSNI

CSND

CSED

Ma trnchuyn

mchchnhcom

URM

BT

eta pupe

trtxmrgxmqom pc


Alar

LR

LR

Cc trung k

khng r

PGS


35/73

Bo co thc tp


H thng ph thuc c chc nng vn hnh v bo dng c h trbi phn

mm vn hnh v bo dng.

Khnng iu hnh truy cp vo tt c cc thit b phn cng v phn mmca h thng tng i Acatel 1000 E10 thng qua thit bu cui Computer thuc

h thng vn hnh v bo dng ph : console, magnetic media, intelligent terminal.

Nhng chc nng ny c thc nhm thnh hai loi:

o Vn hnh cc ng dng thoi.o Vn hnh v bo dng h thng.

Mt khc, h thng vn hnh v bo dng ph h trcho:

o Ti cc phn mm v d liu kt ni v ra lnh cho cc n vtruy cp thu bao s.

o Cp nht tm thi thng tin chi tit ha n

CSNI

CSND

CSED

Ma trnchuyn

mchchnhcom

URM

BT

eta pupe

trtxmrgxmqom pc


Alar

LR

LR

Cc trung k

khng r

PGS


36/73

Bo co thc tp


o Trung tm cc d liu cnh bo t h thng lin kt v iu khintrm thng qua chung cnh bo

o Trung tm h trca h thng.Nh vy, h thng vn hnh v iu khin ph cho php hai cch thc thng

tin vn hnh v bo tr mng cp khu vc v quc gia.

4.Cu trc phn cng.

SMT (1 to 28)x2

SMA 2 to 37

CSN

CSN

CSE

Circuits and

announcement

machine

Mis

SMM

TMN

AL

STS

1 x 3

SMX

LR

LR

LR

SMC

1 MIS


37/73

Bo co thc tp


SMC: Trm iu khin

SMA: Trm iu khin thit b ph tr

SMT: Trm iu khin trung k

SMX: Trm iu khin ma trn

SMM: Trm khai thc bo dng

STS: Trm ng bv c sthi gian.

Ngoi ra trong cn mt s khi khc nh :

- CSNL: n v truy cp thu bao ni ht

- CSND: n v truy cp thu bao xa

- CNE: n v truy cp thu bao xa

- CIRCUITS: Nhm trung k

- MACHINE PARLANTE: Nhm trung k

- PGS: u cui iu hnh bo dng

- Hai a cng 1GB

- Vng cnh bo MAL

- Cc mch vng thng tin MIS, MAS

4.1. n v kt ni chuyn mch chnh (SMX).

- SMX l ma trn vung gc mt tng T duy nht, c cu trc kp (nhn

i), cho php pht trin u ni t64 n 2048 ng LR (PCM) cn gi l

ng ma trn- ng ma trn l ng PCM ni b vi 16 bit cho mi knh (LR gm

32 knh)


38/73

Bo co thc tp


- MCX c to thnh t cc ma trn chuyn mch SMX. SMX c hai

nhnh A v B, mi nhnh MCX gm 1 n 8 MCX (MXC l ma trn chuyn

mch ch)

MXC c thc thc hin kiu u ni sau:- u ni n hng gia bt k nt ng vo no ti bt k mt ng

ra no. C th thc hin ng thi vic u ni s lng cuc gi bng s

lng u ra (dng cho cc cuc gi bnh thng)

- u ni bt k mt ng vo no vi bt k mt ng ra no (dng

cp tone cho cc thu bao)

- u ni bt kn ng vo no vi bt k n ng ra (nhn tn hiuquay s)

n v kt ni chuyn mch MCX c iu khin bi phn mmML.COM gi l biu khin chuyn mch ma trn

MCX c nhim v:- Thit lp gii tou ni bng vic thm nhp vo b nh iu khin

ma trn.

S thm nhp ny cho php vit vo a ch ca khe thi gian ra a ch

ca khe thi gian vo.

- Phng vu ni, bo m u ni chuyn mch s liu chnh xc.

4.2. Trm a x l (SMA): Auxilary Main Station.

Mng u ni MCX bng 8 ng (LR) PCM chuyn bo hiu c to ra

hoc phn tch bo hiu nhn c, qua SMX, SMA cn nhn c cc thi gianc st b thi gian gc.

Ngoi ra SMA cn c cc chc nng sau: t hin chc nng qun l ph tr.

ETA cung cp cc chc nng qun l cc thit b ph trsau:

- B to tone (GT)


39/73

Bo co thc tp


- Bthu pht a tn s (RGF)

- Cc mch hi ngh (CCF)

- B to xung clock cho tng i.

4.3. Trm thi gian c s (STS) : Time And Synchronization Station.

Cung cp xung ng h clock cho cc khi lm vic chng b (CSN,

SMA, SMT, SMX) qua cc ng LR v PCM, chng c ghp 3 v c th hot

ng c lp hoc ng b vi mng bn ngoi.

trnh mt ng b bng cch s dng mt b to sng c n nh rt

cao.

4.4. Trm iu khin chnh SMC (MAIN CONTROL STATION).

Trong OCB283, cu trc phn biu khin c thc hin trn cc trm a

xl iu khin (cc trm iu khin chnh SMC). Trm ny c thit k h tr

cc module phn mm chuyn mch. N bao gm:

- Mt thit bc sgm:+ Mt b x l chnh (PUP) vi b nhring ca n.

+ Mt b phi hp ghp knh chnh (CMP) dng cho vic i thoi

thng qua b ghp knh thng tin lin trm MIS.

- Mt b nhchung MC- N (t0 n 4) n v x l th cp (PUS)- P (t0 n 4) b phi hp ghp knh th cp dng cho vic i thoi trn

cc b ghp knh thng tin MAS vi cc trm SMT, SMA, SMX. Vic xc

nh cc gi trN, P cng nh dung lng cc b nh.


40/73

Bo co thc tp


4.5. Trm iu khin thit b ph tr SMA (AUXILIARY EQUIPMENTCONTROL STATION).

Trm iu khin thit b ph trSMA c thit k h trcc phn mm

x l bo hiu s7 v nh tuyn cho cc bn tin: ML PUPE. Cc trm SMA h tr

cc phn mm qun l thit b ph trML ETA ni cc thit b ph trcung cp

cc chc nng nh: to cc cuc gi hi ngh, thu nhn t hp tn s t cc my

in thoi n phm, to tone.

N c ni vi ma trn chuyn mch chnh thng qua 8 tuyn ni ma trn v

bao gm cc thnh phn sau:

Cu trc chung trm SMC

B NI

GHP CHNH

CMP

B NI GHPTH CP

(CMS)

N VXLTHCP

(PUS)

MCH VNG

LIN TRM

(MIS)

B NHCHUNG

(MC)

MCH VNGXM NHP TRM

IU KHIN

CHNH (MAS)

BSM

N V XLCHNH

(PUP)


41/73

Bo co thc tp


o Mt thit bc sgm: Mt b phi hp dn knh chnh (CMP) chovic i thoi trn b dn knh thng tin c chnh cho tp hp cc trm SMA.

o Mt phn tu ni vi ma trn chuyn mch chnh (SAB)o Mt thit bkch thc thay i c th bao gm:o Mt b nhchung (MC)o T mt n hai b phi hp x l

Cc phm in thoi: STSV

o Thu pht cc tn s (8 mch trn mt b phi hp).o Mch in thoi hi ngh (8 mch vi 4 b phi hp u vo trn mt

b phi hp).

o Pht tn hiu tone (32 b pht trn mt b phi hp).o Kim tra siu ch

Bo hiu a th tc (CSMP)

o Bo hiu s 7 mc 2 (16 ng bo hiu trn mt b phi hp).o Ngoi ra cn c cc th tc HDLC khc.

Qun l thi gian

Thng tin trao i gia cc thit b SAB cc thit b khc ca SMA c

truyn i trn cc tuyn ni bn trong SMA, gi l cc tuyn truy nhp LA. iu

ny cng ng vi SMT v CSNL.


42/73

Bo co thc tp


Mch vng thm nhp trm iu khin chnh (MAS)

MCX: Ma trn chuyn mch chnh

LA: ng truy nhp

SAB: thit b chn nhnh v khuych i

SMA: trm iu khin thit b ph tr

4.6. Trm iu khin trung k SMT (TRUNK CONTROL STATION).

Giao din

MCX (SAB)

B ni

ghp chnh

(CMP)

n v xl

chnh (PUP)

n v x th

cp (PUS)

B ghp tnhiu thoi

(CTSV)

B nhchung

(MC)

B ni ghp th

cp (CMS)B ghp ng h

LA

L

L

BS


43/73

Bo co thc tp


Trm c thit k h tr cc phn mm my ML URM kt ni cc

tuyn PCM bn ngoi ti h thng ma trn chuyn mch v xl trc cc knh s

liu bo hiu kt hp. N bao gm:

+ Mt thit bc s.

+ Mt h thng phi hp knh chnh (CMP) i thoi trn tuyn ghp

knh thng tin (MAS) chnh cho cc trm iu khin trung k SMT.

+ Mt cp n v logic vn hnh ch hot ng /d phng.

+ Mt cp module, mi module iu khin 4 tuyn PCM (ti a 8 tuyn).

+ Giao tip cc tuyn PCM bn ngoi (ti a l 32 tuyn).

+ Cc phn tu ni n ma trn chuyn mch chnh (SAB).

4.7. Trm bo dng SMM.

a.Mc ch ca trm iu dng SMM

Logic

iu khin

B ni

ghp chnh

Ccmodule

thu nhn

Logic

Logic

Cc giao din PCMbn ngoi (32 giao

din)

Ti cc

tuyn PCM

Giao din ma trnchuyn mch chnh

(SAB)

Ti matrn

chuyn


44/73

Bo co thc tp


o Gim st v qun l h thng ALCATEL 1000 E10.o Lu tr s liu h thngo Bo v trm iu khin.o Gim st cc vng ghp thng tin.o Xl thng tin ngi - my.o Khi to v ti khi to ton b h thng

b.V tr ca SMMTrm bo dng c kt ni vi cc thit b thng tin sau:

oVng ghp lin trm (MIS): iu khin trao i s liu vi cc trm

iu khin chnh (SMC).

o Vng cnh bo (MAL): thu thp cnh bo.SMM c th c kt ni ti mng qun l vin thng (TMN) thng qua

tuyn X25.

c.Cu trc, chc nng ca SMM* M t tng qut

SMM gm cc c cu sau:

- Hai trm iu khin (a xl) ng nht (SM), mi trm c trn c

scc thng x l cng thm cc b nhc sca h thng A 8300 v c

kt ni vng ghp lin trm MIS.

- Mt b nhphc ni ti cc Bus giao tip h thng my tnh nh,

m b nhny c truy cp bi hoc l SMMA hoc AMMB.

- Cc giao tip bn ngoi c n nh cho trm hot ng thng qua bus

u cui.


45/73

Bo co thc tp


M t khi qut SMM

Trong cu hnh kp SMM gm 2 trm iu khin m v mt vt l nhn dng

bi cc ch ci SMMA v SMMB. Mt trong hai trm l trm hot ng, trm d

phng.

B ni MIS B ni MIS

Cc giao tip vi bn ngoi

B nhph

SMMB

SCS SCSI

SMMA


46/73

Bo co thc tp


Thit b nhd phng

CMS

UC1

B xl

MC 1

B nhchung

UC 2B xl

MC2

B nhchung

B nikp

B ni Bus gin

tip my tnhnh coup 1

SCSI

B niCOM

B ni

LAS

B ni

Cnh bo

B ni

J64

C c tuyn khngng b

C c vng cnhbo (MAL)

Cc tuynX25

X BUSBus chung

BUS ni b

MIS

BUS b ni

BUS SCSI


47/73

Bo co thc tp


d.Cu trc phn cng* Cc n v x l

C hai n v xl ng nht (SMMA v SMM), ch c duy nht mt

n v hot ng ti mt thi im. Mi n v x l hnh thanh mt trmbo dng SMM trn vng ghp lin trm (MIS). N c thit k xung

quanh XBus (bus chung ca thng ALCATEL 8300).

n v x l c cc bng mch sau:

o Hai cp bng mch ACUTG - ACMGS (B x l v b nh)c u ni vi mch bi 1 bus ni b32 bit a ch.

o Mt cp bng ACAJA/ACAJB cho u ni vi vng ghp lintrm MIS.

o Hai bng ACBSG qun l giao tip bus SCSI.o Mt bng mch h thng ACCSG.o Mi n v x l c mt giao tip vi MIS v mt giao tip vib nhph(a t nhd phng, khi bng t).

o Hai n v x l, mi n v giao tip vi 1 bus u cui thngqua thng tin ng b, khng ng b v b ni u cui.

Mi n v x l c mt bng h thng (ACCSG): hai bng h thng

iu khin chung mch qua li gia hai n v x l (hot ng kp

DUPLEX).

Chng trao i thng qua mt tuyn ni tip HDLC v trao i cc tn

hiu trng (hot ng/d phng/bo dng).

III. Qu trnh thit lp n gin cuc gi.

Cc s sau y ch ra cch thc thit lp gia hai n v truy cp thu

bao s trong tng i Acatel 1000 E10.


48/73

Bo co thc tp


1. Cuc gi mi.

Qu trnh thit lp cuc gi c bt u khi thu bao A nhc my. Lc ny

tn hiu nhc my s truyn n b PU/PE. B PU/PE truyn tn hiu qua b x l

chnh MR, b MR s gi tn hiu iu khin b ETA pht tone mi gi quay s

n thu bao A.

A

CSND

URM

CSND

COM

CSNL B

ETA

PU/PE

SC

Circuits

MAS

PCGXMQMRTRTX

MIS

OM SC : Signaling channelNew Call

MCX


49/73

Bo co thc tp


2. Giai on mtone quay s v nhn s

B ETA l b nhn s, n s gi tone mi quay sn my A qua ng SC,

mi thu bao A quay s.

Khi thu bao A quay su tin, ETA s nhn c v chuyn xung b TR

(l bch s). Sau ETA pht tn hiu mi quay s tip theo cho n khi b TR

thng bo nhn s.

ACSND

URM

CSND

COM

CSNL B

ETA

PU/PE

SC

Circuits

MAS

PCGXMQMRTRTX

MIS

OM SC : Signaling channel

MCX


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Bo co thc tp


3. Ngng gi tone quay s

Khi nhn s, MR siu khin b ETA ngng gi tone quay s

4. Qu trnh phn tch v nhn ca b dch s

A

CSND

URM

CSND

COM

CSNL B

ETA

PU/PE

SC

Circuits

MAS

PCGXMQMRTRTX

MIS


MCX


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Bo co thc tp


Tip n, b MR s truyn tn hiu yu cu bTR tm a ch ca thu bao

c gi ti, v tm knh rnh kt ni. Nu thu bao c gi khng c thc(hoc cha c khai bo tng i), b MR s truyn tn hiu iu khin n b

MQ b MQ pht thng bo cho thu bao A bit. Cn nu thu bao B l c thc,

nhng ang bn th b MQ s pht tn hiu cho b ETA pht tone bn

A

CSND

URM

CSND

COM

CSNL B

ETA

PU/PE

SC

Circuits

MAS

PCGXMQMRTRTX

MIS

OM

SC : Signaling channel

MCX


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Bo co thc tp


5. Rung chung cho thu bao c gi

Nu thu bao B rnh, b MR s gi tn hiu iu khin n b MQ yu cu b

gi tone chung cho thu bao B. ng thi lc b ETA s gi tone chn

thu bao A.

A

CSND

URM

CSND

COM

CSNL B

ETA

PU/PE

SC

Circuits

MAS

PCGXMQMRTRTX

MIS

OM

SC : Signaling channel

MCX


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Bo co thc tp


6. Ngng pht tone chung

Khi thu bao B nhc my, ngay lp tc PU/PE s ngng pht tone chung vbt u qu trnh kt ni. ng kt ni vt l din ra ngay trong ma trn chuyn

mch MCX, lc ny A v B thng thoi.

A

CSND

URM

CSND

COM

CSNL B

ETA

PU/PE

SC

Circuits

MAS

PCGXMQMRTRTX

MIS


MCX


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Bo co thc tp


7. Bt u tnh cc

Lc bt u kt ni, b MR, TR, MQ sc gii phng tip tc iu khin

cuc gi mi. B TX sc tch cc, qu trnh tnh cc s kt thc mt trong hai thu

bao A (hoc B) gc my. Khi , b GX stc ng v gii phng kt ni gia hai thubao A v B trong ma trn chuyn mch MCX

A

CSND

URM

CSND

COM

CSNL B

ETA

PU/PE

SC

Circuits

MAS

PCGXMQMRTRTX

MIS


MCX


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Bo co thc tp


PHN IIIN VU NI THU BAO CSN

I. V tr CSN

CSN l n v u ni thu bao c kh nng phc v c thu bao tng t vthu bao s. CSN c thit k ph hp vi mng c sn v c th u ni ti mi

h thng s dng bo hiu s 7. CSN c th l ni ht k hiu CSNL hay l tng i

v tinh CSND

CSN kt ni mng

CSNL Ma tr nchuy nm ch

CSND

Ma tr nchuy nm ch

UCN

CNL

CNE

UCN

CNL

CNE

LR

PCM

LRI

LRI

PCMPCM

PCMLR


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Bo co thc tp


II. Cc loi thu bao ca CSN.CSN ca ALCATEL 1000E10 c th kt ni ti mi lai thu bao:

- ng dy thu bao tng t 2 dy, 4 dy.- ng dy thu bao s tc lung c s 144kb/s. Hai knh c s (B) tc

64kb/s+1 knh s liu(D) tc 16kb/s (2B+D).

Trong knh B l knh ting hay knh mang s liu thc.

Knh D cn gi l giao thc truy nhp knh nghip v LAP, c s dng cho

3 mc ch:

- Bo hiu- S liu chuyn mch tc chm- o kim t xa.

Ti a c 5120 thu bao trong mt CSN.

Thu bao ca CSN

UCN

CNLM

CNEM

NT 1

PABX

NT 1

PABX

2 to 4PCM

2to16

2 to 4

144kb/s2048kb/s

144kb/s2048kb/s

PCM


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Bo co thc tp


PABX: Tng i t ng t nhn.

CNLM: B tp trung s ni ht.

CNEM: B tp trung s v tinh

NT1 : u cui mng loi 1

PCM : iu ch xung m PCM.

III.Chc nng ca CSN.1.Chc nng ca biu khin s UCN

Thc hin chc nng giao tip CN v chuyn mch, UCN gm:

- n v iukhin v kt ni UCX, c cu trc kp, hot ng theo kiu hotng/d phng. n v UCX hot ng iu khin mi lu lng v lun cp hp

cc n v UCX d phng, do vy nu c s c UCX hot ng th UCX d

phng c th chuyn i thay th tc thi x l ton b lu lng .

- Mt khi x l thit b ph tr GTA, thc hin mt chc nang ring bit caUCX:

+ To cc tone v cc bn tin thng bo cho thng tin ni b khi CSND

hot ng t tr.

+ Nhn din cc tn hiu a tn t cc my in thoi n phm

2.Phn loi b tp trung CN.C hai loi b tp trung c th ni ti UCN.

- CNLM: B tp trung ni ht cho thu bao tng t v s. CNLMni ti UCN bng cc ng LRI.

- CNEM: B tp trung thu bao xa cho thu bao tng t v s.CNEM

ni ti UCN bng cc ng PCM.CN c th kt ni ti a ti 256 thu bao.


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Bo co thc tp


IV.Cu trc chc nng CSN.1.Khi iu khin v kt ni UCX.

1.1. Bng mch in TMQR.Khi iu khin v kt ni c cu trc kp v c chia ra lm hai phn:

- Ma trn kt ni RCX : S dng bng mch in TRCX.- Khi iu khin UC gm nhng bng mch:

+ TMQR : Market cho ma trn kt ni.

+ TPUCB : bng x l iu khin.

+ TMUC2M : Bng b nh iu khin.

+ TCCS(SCV7) coupler qun tr bo hiu s 7 gia CSN v SMX(OCB).

+ TCCS(SVCUT) : Coupler qun tr bo hiu HDLC gia UCX v ccCN,GTA.

Tt c cc bng mch in ni vi mt bus iu khin UC. Hu ht cc bng

trn u c cu trc kp,hot ng trong ch hot ng/d phng theo cc tn

hiu P/R c bng mch chn la TSUC to ra. Bng mch ny c cu trc n.

1.2. Bng mch in TPUCB.Bng mch in TPUCB x l v gim st chuyn mch, phng v cc chc

nng vn hnh v bo dng cu CSN. Bng mch ny ni ti cc b tp trung v

GTA qua bng mch in coupler TCCS-SVCUT v niti MCX thng qua bng

mch in coupler TCCS-SVC7.

Cc bng mch TPUCB c ni vi nhau cp nht cho phn d phng

t phn hot ng.

2.Bng mch in TMUC2M.Cc khi iu khin UC khng hi thoi trc tip vi nhau m hi thoi thng

qua b nh chung . l bng nh TMUC2M. C hai loi b nh.

Mt b nh 64kB lp trnh li c chc nng cc chng trnh khi to cho

tt c cc khi iu khin.

Mt DRAM vi m t sa sai, c dung lng 2MB, t m 16 bit.


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Bo co thc tp


3.Cc bng mch in TCCS.Cc bng mch in TCCS c hai chc nng:

- SVCUT: x l hi thoi gia cc b tp trung, GTA v khi iu khin UC.- SVC7 : X l hi thoi gia OCB-283 v UC.Phn cng ca hai bng mch in ny ging htnhau nhng phn mm th tu thuc

vo kiu giao thc.

+ TCCS-SVCUT: X l bo hiu HDLC.

+ TCCS-SVC7: X l bo hiu CCITT N07.

Cc LR0 v LR1 c dng ni hai bng mch in ny ti RCX.

4.Coupler cung cp bo hiu HDLC: Bng TCCS-SVCUT.Trao i bo hiu vi cc bng mch UT bng giao thc bo hiu s 7. Tn

hiu bo hiu HDLC qua li gia cc b tp trung, GTA v UC c truyn trn

TS16 ca tt c cc ng kt ni gia chng vi nhau.

Tn hiu bo hiu HDLC t cc b tp trung hay GTA c pht song song

trn 4TS16. Ch c 2TS16 trn LRI0 v LRI2 c kt ni qua RCX bi hai kt ni

bn c nh v s ti TSx ca LRI0 v LRI1, TSx c phn nhim cho tng CN.

Mi TSx thng qua kt ni bn c nh RCX ni ti TS16 ca LRI0 v LRI2 i

ti CN/GTA.S trao i thng tin gia OCB283 (SS7) v CN/GTA (HDLC) din ra nh

sau: Yu cu t OCB283 qua hai knh bo hiu s 7 l COC 0 v COC1 qua kt ni

bn c nh ti RCX ti TCCS-SVC7 a qua bus UC, c TPUCB x l trong

vng b nh chung MC ri gi p ng (HDLC) qua bus UC ti TCCS-SVCUT qua

kt ni bn c nh ti RCX ti TS16 ca LRI0 v LRI2.

5.Coupler cung cp bo hiu s 7 bng TCCS-SVC7.Bo hiu s 7 gia CSN v OCB283 c truyn trn TS16 ca hai ng

LR0 v LR1. Cc TS16 thng qua cc kt ni bn c nh s ni ti TS31 ca LRI0

v LRI1 ch c bng mch in TCCS h tr bo hiu s 7 mi x l ni dung thng

tin mng trong TS31.


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Bo co thc tp


Bng mch in TCCS xy dng xung quanh vi x l TAPX186 v c 32KB

RAM b nh ny bao gm cc phn mm qun tr bo hiuh s 7.

6.Bng mch in TSUC.n v u ni v iu khin UCX vn hnh trong ch hot ng/d phng

v bng mch TSUC c s dng la chn mt trong hai ch . Thng tin

ny c truyn thng qua tn hiu ch o hot ng/d phng(P/R).

Trong :

- P/R=0: UCX=0 ang ch hot ng.- P/R=1:UCX=1 ang ch d phng.

Bng mch TSUC c mt logic cng quyt nh s la chn ch vn

hnh da vo:- Cc tn hiu bo li ca UCX.Tn hiu ngh chuyn mch mm, i hi cc xc nhn t cc khi khc.

7.Ma trn kt ni RCX. vn hnh an ton th ma trn kt ni RCX ca UCN c cu trc kp vn

hnh theo ch hot ng/ d phng, hai mt hi thoi vi nhau theo giao thc

HDLC. RCX c to thnh t cc bng chuyn mch thi gian TRCX.RCX c cu

trc modul c ngha l c th c mt hai hay ba bng mch TRCX tu thuc vo slng cc LRI c s dng.

Mt bng mch TRCX c th kt ni ti 16LRI. Gi s ma trn kt ni c

48LRI kt ni vi cc CN th t chc ccLRI c gn nh sau:

- LRI0,LRI1: kt ni vi bng mch TCCS.- LRI2,LRI3,LRI4: Kt ni ti GTA- LRI5: cha s dng- LRI6,LRI7: Kt ni vi CNL,CNE.

8.Khi x l ph tr GTA.GTA nm trong ngn gi UCN. N c cu trc tng t nnh mt b tp trung

v c ni ti ma trn kt ni RCX bng ti a 4LRI.

GTA bao gm:


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Bo co thc tp


0 ti 2 n v thit b u cui to cc bn tin thng bo v tone cn thit cho

ch hot ng t tr ca CSND l bng TFILM.

0 ti 2 n v thit b u cui nhn tn hiu quay s a tn t my in thoi

n phm khi CSND ch t tr, l bng TRF8B.

- Mt thit b u cui kim tra cc ng dy thu bao tng t c kt

ni vi CNL, l bng TMLAB.

- Hai giao tip iu khin phn phi xung ng h v cc lin kt ni b tingn gi my, bng THLR.

GTA lun lun b tp trung s 20 (CN=20)

Bus iu khin trnh xung t c chc nng phn nhim vic chim dng Bus

iu khin cho tng bangr mch, bnh thng khi khng c hi thoi th trng thica bus c logic bng 0, nu c bng mch no cn chim dng th n s iu chnh

trang thi ca bus v logic1. Khi trng thi bus chuyn v bn.

Cc ng h DT0,DT1 c cung cp cho GTA hot ng theo hot ng d

phng.

9. Ch hot ng t tr ca CSNDTrong trng hp cc knh bo hiu s 7 gia CSND v OCB283 b gin on

th CSND s chuyn sang ch hot ng t tr. Trong trng thi ny thu bao

trong CSND cho php CSND kt ni cc cuc gi ni ht, lc CSND vn hnh

nh mt chuyn mch nh.

- B x l thit b ph tr GTA pht cc tone.- GTA nhn cc tn hiu quay s a tn- UC phn tch cc thng tin.- GTA pht cc bn tin thng bo .

Trong ch t tr ccs cuc gi khng tnh cc . Khi knh bo hiu c

khi phc th sau 15 pht cc cuc gi t tr ang c tin hnh s b chm dt.

Hot ng t tr ca CSND c m t.


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Bo co thc tp


10. Cc giao tip kt ni10.1.Giao tip gia CSND v OCB-283

CSND kt ni ti OCB-283 qua ti a 16PCM. Mi PCM ni qua mt bng

mch TTRS c t ti CSND, giao tip gia CSND v OCB -283. Khi nhn

tn hiu t OCB-283 bng mch TTRS thc hin cc chc nng sau:

- Chuyn i m HDB3m nh phn.- Tch cc xung ng b- ng b cc kt ni PCM- Pht hin cc cnh bo PCM.

10.2.C s thi gianBng mch TBTD nm trong CSND v c vai tr l to tn hiu thi gian

cho hot ng ca CSND, hai ng h c to l ng h 4MHZ v 8KHZ.

(D4M+DSBT). Nhm nngcao an ton, bng mch TBTD c cu trc kp.

CSND c hai b giao ng OCS0 v OCS1 nm trong cc bng mch

TBTD 0 v TBTD1. Mi bng mch TBTD nhn cc xung ng h tham kho t

PCM 0,1,2,3 t 4 bng mch TRRS u tin l TTRS 0-TTRS3 .Mi TBTD cn

nhn cc cnh bo t 4PCM ny cc cnh bo ny c s dng chn ra 1 trong

4 xung ng h t PCM ng b dao ng OSC. 11. Giao tip gia CSNL v MCX.

y chnh l chc nng ca CSNL c thc hin bi hai bng mch

TCILR v TCBTL, trong 2 n 16 TCILR thc hin chc nng giao tip ng

mng v 2 TCBTL cung cp xung ng h cho CSNL.

Khi nhn t SMX n CSNL n thc hin:

-

Tnh ton chn l trn tng TS.- So snh nhnh A v nhnh B.- La chn nhnh A v nhnh B.- La chn nhnh gi ti bng mch TCILR.


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Bo co thc tp


V.Thit lp cuc gi ni ht trong CSN.1.Thu bao ch nhc my.

S thay i trng thi mch trong mch vng thu bao c thit b ng dy

thu bao tng ng pht hin . B vi x l thm d theo chu k ti cc dy t TB 0 -

TB16 xem c s thay i trng thi no ca cc thu bao ni ti TABA 16 hay

khng.

Mt cuc gi c pht hin v chng thc bi:

- S so snh trng thi hin thi ca thu bao vi trng thi trc c ghitrong RAM ca b vi x l.

Sau khi cng nhn cuc gi mi, bn tin nhc my c gi ti UCN.

- DEC: Bn tin nhc my.- ADUT: chca UT. N c truyn trn cp a ch pha sau ngn my

ca b tp trung v nhn gi tr t 1 n 16 vi bng mch TABA16.

- Ch s kt cui: l s ca thu bao trn bng mch TABA16 v c th nhngi tr t 1 n 15.

- EVS: S kin n: bn tin DECgi nhng thng tin lin quan ti mt skin n l.

2. Nhn bn tin DEC trong UCN.Bn tin DEC c bng mch TCCS-SVCUT nhn v kim tra .Khe thi

gian TS16 ca cc tuyn LRI mang bo hiu HDLC c kt ni theo kiu bn c

nh ti cc khe thi gian chung trn tuyn LRI 0 v LRI 1. bng mch TCCS c th

s ca khe thi gian, ch s ca CN tng ng v suy ra CN gi bn tin DEC.

Bng mch TCCS truyn bn tin nhn c v ch s ca CN v vng

m trn bng mch TMUC ni thng tin c ly mu v x l . Sau khi phn tch

bn tin, ni dung s c ly ra t b nh ca TMUC.Ni dung ny c gi l ni

dung tham kho CSN, s cho php lu vo b nh tt c c gi l ni dung tham

kho CSN s cho php lu vo b nh tt c cc thng tin cn thit thit lp,

gim st v hu b cuc gi.


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Bo co thc tp


Vi s tr gip ca cc thit b trn bng mch TMUC chng tm mt khe thi

gian ri ra ca CN ni m cuc gi ang c vi mt khe thi gian u ra

ca CSN. Khi , mt yu cu c gi ti bng mch TMQR, to ra kt ni

cho gia khe thi gian LR vi khe thi gian LRI.

3. Nhn bn tin BCL.Vai tr ca bn tin ny l thc hin u vng cho TS-LRI c chn vng

ny c s dng kim tra s thng sut gia UT v UCN:

- BCL: Mch vng- ADUT: a chca UT.- Ch s ca n v u cui.- Ch s ca ng mng LR.- Ch s ca TS (khe thi gian).Khi nhn c bn tin, n v kt cui to ra mt vng ti mc b iu khin

.Thit b chn vo v tch ra trn bng mch TRCX cho php kim tra lin tc.

4. OCB nhn bn tin cuc gi miChc nng ca bn tin NOVAP l to m mt vng giao MR nhn v

n chim mt thnh ghi cho thit lp cuc gi, Bn tin ny c gi i bi bng

mch TCCS-SVC7 ti mt trong hai lin kt bo hiu mang bo hiu s 7.S la chon linkt bo hiu SCS c thc hin bi CSN. Cc bn tin c

lin quan n dng mt cng vic phi c truyn trn cng mt lin kt bo hiu

v CSN truyn thng tin CSC ti OCB-283 thng qua bn tin NOVAP.

Vi trng chuyn mch ca OCB.PU/PE c mt bng tng ng. TS vi

s CSN suy ra ch s ca CSN gi bn tin NOVAP. PU/PE chuyn i bn tin

nhn dc trong dng bo hiu s 7 thnh giao thc ph hp trn MAS. Bn tin

c gi trn MAS c gi l m cuc gi mi OUNAP.

Vic nhn bn tin ny cho php MR chim mt thanh ghi gim st vic thit

lp gi.


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Bo co thc tp


5. Yu cu thuc tnh ca thu bao ch giMR cn bit thuc tnh ca thu bao ch gi :

- Nu thu bao ch gi l my n phm th mt b thu tn s c gii m cctn s.

- Nu thu bao ch cho php gi vo th n phi c ni ti m bo bn.- Nu thu bao l hn hp hay ch gi ra, n phi c ni tip m m quay s.

nhn c cc c tnh ca thu bao. MR cn gi mt bn tin ISDR ti

TR. Bn tin ny cha ch s ca thu bao ch gi nh ch s UR. Ch s CN, ch s

UT, ch s kt cui TT.

TT tr li bng bn tin RDISDR. Tt c cc thng tin c lu trong thanh ghi

c chim gi trong MR chng s c s dng thit lp thng tin.

6.u ni mi quay s v cng nhn cuc gi mi.Thng qua mch vng thng tin MAS, MRra lnh cho MCX ni m mi quay

s. m mi quay s do GT trong GTA pht, c c ch s ca UR,LR. Suy ra

ch s ca MCX,LRX tng ng, t MQ,MR gi nhng thng tin sau n MLCOM:

- OCXGT (yu cu u ni m quay s).- a ch SMX-LRX-TS u ni n thu bao ch gi.

MR gi ti CSN bn tin ACNAP (cng nhn cuc gi mi). Bn tin ny gi l

OCOAB truyn gia MR v PUPE. Mc ch ca bn tin ny mt mt l cung cp

cho CSN nhng ch dn t thanh ghi gim st thit lp thng tin mt khc yu

cu CSN b u vng ti mc iu khin ca n v kt cui.

Bn tin ACNAP a t MR qua RCX n TCCS-SVC7. Sau a sang

TPUCB yu cu u ni m mi quay s v cho ch gi. Sau TPUCB a

v cho n v kt cui thu bao thu baonghe thy m mi quay s.

7.Nhn cc con s quay s t thu bao ca CSN.Bn tin ACNAP gi t OCB283 trn lin kt bo hiu s 7 c Coupler

TCCS-SVC7 nhn v sau a sang TMUC v TPUC yu cu ni m mi

quay s v cho thu bao ch gi sau . TPUC gi bn tin CNXIAN cho TCCS-


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Bo co thc tp


SVCUT a v n v kt cui thu bao. Chc nng ca bn tin ny l loi b

iu kin u vng, do cho php thu bao ch gi nhn c m mi quay s. B

vi x l ti UT s nhn bit m/ng mch vng. Khi b vi x l pht hin lc u

xung quanh s th nht, n ra lnh cho b iu khin ct m Mi quay s. Sau mi

con s nhn c th UT li gi mt bn tin ti UCN, l bn tin CHI(con s).

Sau khi nhn c bn tin CHI t UT,UCN gi sang TMUC sau sang

TPUC. N to mt bn tin CHIUN a n TCCS-SVC7, sau qua ng COC

ti PUPE sau ti MR.

8.Phn tch s nhn c

Trong qa trnh nhn bn tin CHIUN, MR ra lnh cho MLCOM(ODXGT) ctm mi quay s sau MR yu cu TR phn tch s nhn c, phn tch theo hai

bc:

8.1.Tin phn tch: L phn tch cc con s u tin nhn c xc nh ra loicuc gi ni ht, vng, quc gia,dch v c bit.

8.2.Phn tch hon ton cc con s. TR phn tch ch ra- Thng tin tnh cc.- Ch s thit b ca thu bao b gi, con s ny bao gm:

+ Ch s CSN(UR).

+ Ch s CN

+ Ch s UT.

+ Ch s ng thu bao

TR di bn tin tr li MR.

9.Ngng pht con sKhi MR nhn c kt qu phn tch . N gi mt bn tin l DIREC n

UCN, Coupler TCCS-SVC7 s nhn bn tin, bn tin ra lnh cho UCN ngng khng

pht tip nhng con s tha n OCB. Bn tin DIREC bao gm cc s liu:


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Bo co thc tp


- Ch s CN.- Con s tham kho ca MR.- Chn la lin kt bo hiu CSC.

Bn tin ny khng c gi n UT c ngha l thu bao c th quay tha s

nhng chng khng c gi n OCB.

10. Kim tra thu bao b giMR bit ch s thit b ca thu bao b gi v n cn kim tra xem thu bao

bn hay ri, lm vic ny, MR gi bn tin TESEQ (kim tra thit b) ti CSN c

cha thu bao b gi. Gia MR v PUPE bn tin c tn OCOAB.Trong qu trnh

nhn bn tin ny, UCN nhn mt context gim st cuc gi v phn tch trng

thi thu bao11. u ni hi m chung cho ch gi v ch b gi nhc my.

Khi nhnc bn tin TESEQ, MQ thc hin cc cng vic:

- Yu cu MLCOM ni hi m chung ti thu bao ch gi.- Hi MQ v thu bao ch gi t ch s ca UR,LR, tm ra ch s caSMX,iRX tng ng.

Sau MR ch mt trong 3 trng thi sau:

+ Thu bao b gi nhc my+ Th bao ch gi t my.

+ Qu trnh thi gian t chung.

12.Thu bao b ginhc myThu bao b gi nhc my trng thi ny c UT pht hin, khi ng dy

thu b ngt khi dng chung v bn tin nhc my DEC c gi ti UCN. UCN

nhn bn tin ny v gi bn tin thng bo v trng thi mch vng thu bao EVABO

ti MR.

Bn tin c truyn t PUPE ti MR gi bn tin OABCO trong qu trnh nhn

bn tin ny,MR thc hin cc cng vic sau:

- Yu cu MLCOM ct hi m chung ti bao ch gi bn tin DCGT.


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Bo co thc tp


- Gi bn tin yu cu ni DCXT cho MQ yu cu u ni thu bao.

Bn tin DCXT ny cha ch s SMX-LRX-TS ca thu bao ch gi v

b gi kt quu ni c gi ti MQ bng bn tin tr li yu cu

ni RCXT.

Gi bn tin yu cu tnh cc cho cuc gi DTAXCDR cho TX yu cu bt

u tnh cc cho thu bao ch gi, bn tin ny cha nhng d liu tnh cc pht

sinh t s phn tch thuc tnh ca thu bao ch gi v b gi .TX gi bn tin tr li

yu cu tnh cc cuc gi RTAXCDR cho MR v bt u tnh cc.

13.CSN gim st thu baoKhi thng tin gia hai thu bao c thit lp o, thanh ghi dng cho thit lp

thng tin s c gii phng . MQ gi yu cu gim st thu bao ti CSN. Yu cuny c gi thng qua bn tin hu b m vng trao i vi MR l SUTRA.

Bn tin ny cha nhng thng tin sau:

- Ch s ca MR.- Ch s ca CSN.- SCS.

Khi nhn c bn tin ny, CSN bt u gim st cuc gi v bn tin yu cu

u ni CNXP n UT. Chc nng ca bn tin ny l loi b mi mch vng, khi hai thu bao c th hi thoi c nhau.

14.Gii phng cuc giMt trong hai thu bao kt thc cuc gi (t my) CSN nhn bit bo cho MR

bit, MR yu cu GX iu khin gii phng u ni trn trng chuyn mch, ng

thi MR yu cu gii phng, kt thc qu trnh tnh cc v m thoi gia hai thu

bao.


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PHN IV THU BAO TRUNG K.

1, Cc loi giao din trung k:

a, Giao din trung k tng t(CO):

Giao din trung km chng ta thng gp nht l giao din tng

t 2 dy. Loi giao din ny mi ng dy cho php 1 knh thoi v c 1

sin thoi duy nht lin lc i v n (gi i th hin s, v s

ngi khc gi n).

u im ca loi ny l sn gin v s ph bin ca thit btng thch. Cc thit b c thu ni vo ng dy ny s dng lcc in thoi tng t2 dy, my Fax, Modem tng t. Ngoi ra cc thitbu cui k trn cn cc h thng tng i ring c giao din trung ktng t, hu ht cc h thng tng i u hn trgiao din trung k ny

(mt s loi ch h trgiao din trung kny nh KX-TEB308/TES824).

Nhc im ca trung ktng t l cht lng ph thuc vo ng dy

v cc mi ni v btc ng ca cc sng in t. Ting ni trn ngdy tng t c nhiu nhiu n. bo mt trn ng dy km.

b, Giao din trung k k thut s:

Cc giao din trung kk thut s bao gm cc giao din T1, E1, BRIv PRI30 (cn gi l E1-ISDN). Mi mt ng dy trung k k thut s


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cho php nhiu knh thoi ng thi (nn cn c gi l trung k lung),c th:

Giao din T1: 24 knh thoi / 1 ng

Giao din E1: 30 Knh thoi / 1 ng

Giao din BRI: 2 knh thoi / 1 ng

Giao din PRI30 : 30 knh thoi / 1 ng

Khng ging nh ng dy trung ktng t, cc ng dy trung

k skhng u ni trc tip vo tng i m thng qua mt b kt cuimng (NT).

[Nh cung cp]>>---------->>[Kt cui mng]>>---------->>[Tng i]

ng truyn dn t nh cung cp ti kt cui mng thng l cp quang.

T b kt cui mng ti cng trung ktng ng trn tng i thng s dng cpng 4 si v u u ni RJ45 (ging mng my tnh)

Mi mt ng dy trung k sc cp mt di stng ng vi s knh, c th

Giao din T1: Di 24 s

Giao din E1: Di 30 s

Giao din BRI: Di 2 s

Giao din PRI: Di 30 s


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Cc giao din trung k s cho php chng ta tn dng ti a ti nguyn s.i vi ng dy tng t, khi chng ta thu nhiu ng dy v s dng dchvtrt th ti nguyn sthng c s dng mt cch lng ph, khi ch c schnh c s dng m cc s phthng khng c s dng.

i vi ng dy thu bao k thut s cc skhng c gn cnh cho bt c

knh thoi no, khi chng ta gi ti cc s my trong di cuc gi s ln ltchim tng knh, nh vy chng ta c sn dch vtrt s cho c di s.

Ngoi ra chng ta c th lp trnh h thng tng i tng i chuyn tip cuc

gi ti ch theo tng s trong di.

V d:

Chng ta thu mt ng E1 v chng ta c di 30 stxxxxxx11,xxxxxx12, xxxxxx40

Chng ta c thlp trnh cc cuc gi ti sxxxxxx11 sc chuyntip ti my nhnh 101 cho d n chim bt cknh thoi no, cuc gi ti smy xxxxxx12 sc chuyn tip ti my 105, v.v Tt nhin l cc my nhnhc ththay bng mt li cho hng dn truy cp (DISA), mt nhm my (ICD

Group) hay mt hp th thoi (Voice Mail Box)Nh vy chng ta c thchn mt strong di lm sFAX v chng ta

lp trnh cuc gi vo smy ny sc chuyn tip ti my nhnh cm my

FAX.Trng hp khc, chng ta c thcp cho ngi dng no mt smy

cng cng, chng ta lp trnh cc cuc gi vo smy ny sc chuyn tip

ti my nhnh ca ngi . Trng hp ny ngi c thva lin lc ni bva nhn trc tip tmng cng cng m khng cn phi sdng 2 ng dy: 1ng dy my nhnh v 1 ng dy trc tip.

Mt iu khc bit na l chng ta c ththu thm di ssdng

cho cc mc ch khc nhau. V d mt ng dy giao din E1 30 knh thoi vi

mt di 60 s.u im ca trung kgiao din k thut s l cht lng thoi cao

khng b nhiu n. Ngoi ra sdng trung kgiao din k thut scho php s

dng cc dch vnng cao nh m ttrn. Mt u im na l bo mttrn ng dy k thut scao hn so vi ng dy tng t

Nhc im ca trung kgiao din k thut s: Tuy rng tt c cc nh


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cung cp dch v hin ti u c thcung cp cc giao din trung ksnhng vnph thuc v vtr a l ni sdng. Nu bn mun sdng giao din trung kk

thut shy lin h trc tip vi nh cung cp c thng tin chnh xc vdchv.

2, u ni thu bao trung k

* 30B+D

* E1R2MFC

Loi cp c s dng ch yu y l cp quang v cp ng.Vic la chn cp quang hay cp ng l ty thuc vo loi ngi s dng hay ty

thuc vo loi modem.


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TI LIU THAM KHO

1. Instut de Formatio Hng Acatel CIT2. Bi ging mng vin thng Nguyn Giang Nam3. ALCATEL 1000E10 (OCB-283)

Báo cáo Alcatel

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