hoi thao bts alcatel2

7/30/2019 Hoi Thao BTS Alcatel2

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TRUNG TM TTD KV III V TUYN

HI THO

BTS ALCATEL


2/71

NOI DUNG TRNH BAY

TONG QUAN VE BTS A9100

KHAI THAC BTS A9100

BTS SBL & BTS TERMINAL

211/24/2012


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311/24/2012


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TONG QUAN

He thong GSM Viet Nam khai thac hai bang tan: 900MHz va 1800MHz

Uplink Downlink

GSM 900 890MHz to 915MHz 935MHz to 960MHz

GSM 1800 1710MHz to 1785MHz 1805MHz to 1880MHz

dai tan 900MHz: Co BW 25MHz c chia thanh 124 RFC

VMS c s dung phan oan th ba cua dai tan,

tng ng la RFC84->RFC124

dai tan 1800MHz: Co BW 75MHz c chia thanh 374 RFC

VMS c s dung phan oan th hai cua dai tan,

tng ng vi RFC125 ->RFC249

411/24/2012


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V TR CUA BTS TRONG MANG TTD

511/24/2012


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S O KET NOI TRONG MOT BTS

truyn dn

(DDF)

Alarms

Rectifier

c QuiCu dao o

Ngun (220 AC)

IF SignalFeeder

BTS Alcatel

Ngun DC

Lung E1

My pht (220 AC)

Ngun DCAlarm Cable

On Ap

611/24/2012


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CAU TRUC CUA BTS A9100

SUMA

Cac TRE

Cac ANC

711/24/2012


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CAC THANH PHAN TRONG BTS

SR1

SR2

SR3

SR4

SR 5

ANC-3 ANC-2

ANC-1

43

S

UM

A

Co 5 Subrack c cap nguon DC -48v, c anh

so : SR1 --> SR5

Cac TRE c phan bo tren SR1,SR3,SR5.

Cau hnh Full cua mot BTS la 12 TRE c

phan bo nh hnh.

Cac SR2 va SR4 thng c danh chophan bo SUMA va ANC.

811/24/2012


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CHC NANG SUMA

To xung nhp cho tt c cc module khc trong BTS.Cc xung nhp ny c th c ng b vi xung nhp thamchiu bn ngoi, v d nh ng truyn Abis, hay l trmBTS khc.

m bo ng dng v vn hnh v bo dng BTS trungtm.

iu khin hai ng truyn dn Abis.

iu khin knh vn hnh v bo dng (OML) v cc giaothc Qmux (gim st thit b truyn dn)

911/24/2012


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CHC NANG ANC

Downlink:

Cch ly b pht v b thu.

Kt hp hai b pht kt ni chng ra chung mt anten.

Chuyn mch cho php b pht v b thu s dng chung

mt anten. Ghp cng sut v pht hin ly mu VSWR ca cng sut

pht v cng sut phn x.

Uplink:

Tin khuch i khuch i cc tn hiu thu c v iukhin li ca ton mng anten.

Chia cng sut phn phi tn hiu nhn c vo hai b thukhc nhau

1011/24/2012


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CHC NANG TRE

X l di nn v tn s v tuyn.

Qun l ti nguyn v tuyn: m ha v gii m burst, iuch v gii iu ch, iu khin cng sut

Qun l knh truyn mt t: iu chnh tc truyn, qun lcc knh LADP 16kbps v 64kbps vi vic ghp knh tnh.

Qun l thu pht vin thng: qun l qu ti, cu hnh vin

thng.

X l tn hiu tng t: gim st thu pht analog

1111/24/2012


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TRUYEN DAN

Giao tip Abis: Hai giao tip Abis vt l c s dng kt ni BTS vi BSC,

c quan ly bi card BIUA cua BSC.

c gim st bi cc chc nng truyn dn cpha BTS v

BSC. BSC, BTSc TSCA giam sat ch thong qua OML va quan lythong qua a ch Qmux cua tram.

c iu khin etruyn lu lng v tn hiu bao hieu.

Giao tip Abis c bng thng 2Mbps, bao gm 32 khe thigian, mi khe c tc 64kbps.

1211/24/2012


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TRUYEN DAN

Bo hiu:

Cc khung bo hiu c gi thng qua RSL gia BSC vcc khi chc nng di nn, mi RSL c yu cu bi mt sngmang BTS.

Thng qua OML gia BSC v cc khi chc nng vn hnh v

bo dng, mi BTS ch c duy nht mt OML. Lu lng:

Cc TS khng mang thng tin bo hiu th s c sdng mang lu lng. Mi TS 64 kbps s c chia

thnh 4 nibble c tc 16 kbps. Mi knh TCH FR s dng mt nibble.

Mi knh TCH HR s dng mt na nibble.

1311/24/2012


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KHAI THAC BTS A9100

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BTS A9100

16 chan

Alarm

4 Port luong

6 CB nguon DC

X104X103

X102

X101

X108

X109

X107

X106

X105 1511/24/2012


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V TR CAC CARD TRONG TU

oi vi SUMA ch gan c Slot X101 va X106 tren mot Subrack. Nh

vay, vi BTS A9100 se co 10 v tr co the danh cho viec gan SUMA, tuy

vao cau hnh cu the e chon v tr thch hp.

oi vi ANC se gan c Slot X103, X106 & X109 cua moi Subrack, v

vay so v tr co the gan ANC la 15.

Vi TRE th ta co the gan Slot X101, X104, X106 &X108, nen tren ly

thuyet se co ti 20 Slot thch hp cho viec gan TRE.

1611/24/2012


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CAC TRANG THAI SUMA:

1711/24/2012


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CAC TRANG THAI ANC

O&M

Alarm

1811/24/2012


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CAC TRANG THAI TRE

RSL

.

.

TX

OP

FAULT

1911/24/2012


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SYSTEM ALARMS

Alarms1 ->16

ELTEK

POWER

SAFT

POWER

SUMA

OMC-R

BSC

OR

Trong 16 Alarms th hien tai ch s dung Alarms so 1, 2 &11.

Alarm 1 : Rectifier Alarm H Rectifier

Alarm 2 : Main Failure Mat ien li AC

Alarm11 : Battery Discharge ien ap ACCU di ngng cho phep

1, 2, 11 Alarm Cable

2011/24/2012


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SYSTEM ALARMS

oi vi BTS A9100 s dung tiep iem thng ong nen e xuat hien ung

canh bao ta phai au day canh bao vao chan NC(Normal Close) & C(Common).

Cach au canh bao khi dung nguon ELTEK or SAFT nh sau:

:

Rectifier: -> au chan so 18&19 tren Board Alarm cua tu nguon. Main Failure: -> au chan so 8&9. Battery Discharge: -> au chan so 15&16

2111/24/2012


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SYSTEM ALARMS

:

: S dung day Nau cua cap Nau&Lam ket hp vi day Lam cuacap en&Lam e au cho canh bao nay.

: S dung day Trang cua cap Trang&Lam ket hp vi day Lam

cua cap Dng&Lam

: S dung day vang cua cap Vang&Lam ket hp day Lam

cua cap Luc&Lam

2211/24/2012

Chu y: co the dung VOM o ngan mach e kiem tra neu khong chac achon ung day Lam mong muon.


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BTS SBL &

BTS TERMINAL

2311/24/2012


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SBL (SECURITY BLOCK)

Cc nh ngha

Cu trc SBL ca BTS

Cc trng thi SBLCc lnh vn hnh SBL

2411/24/2012


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CC NH NGHA

SBL (Security Block) Mot SBL mieu ta mot thc the cua BSS ma co the quan ly c bi chc nang

O&M, no co the la: mot thiet b (nh RA), mot tai nguyen (nh BTS_TEL).

Mot SBL co the c gi bi mot so RIT (Replaceable Item), nh SBL RA. Mot board co

the chiem mot so SBL, nh SBL board SUMA.

Mot SBL c nh ngha bi cac thong so sau:

Unit Type: Ch ra nhom SBL ben trong BSS, v du: BTS.

Unit Number: Nhan biet mot khoi lap lai mot so lan trong cung BSS.

SBL Type: ay la ten cua SBL, v du: TRE.

SBL Number: Nhan biet mot SBL lap lai mot so lan trong cung mot BSS.

SBL Subnumber: Mieu ta so cua mot SBL la mot phan cua SBL khac

2511/24/2012


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CC NH NGHA

RIT (Replaceable Item) RIT la mot module vat ly nho nhat co the thay the c trong trng

hp co loi (v du nh la mot board).

Mot RIT c nhan dang bi cac thong so sau:

: Co the la BSC, BTS hoac TC. : Nhan biet mot khoi c lap lai mot so lan trong cung

mot BSS. V du, mot BSS co the bao gom en 255 BTS, Unit Number

cua BTS co the la 1 ... 255.

: Ch ra mot rack vi mot so rack. : Nhan dang shelf trong mot rack.

: Nhan dang slot trong mot shelf.

2611/24/2012


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CP BC SBL TRONG BTS

BTS

CLLKEACB OMUCCFs

RA1 RA2

TRE1 TRE4 TRE5 TRE8

RA3

TRE9 TRE12ABIS-HWAY-TP

BTS_TEL

2711/24/2012


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CC TRNG THI SBL

XXXHWAYXXXXXXXCCF

XXXXXXXTRE

XXXXXXXXRA

XXXXXXXEACB

XXXXOMU

XXXXXCLLK

XXXXBTSMSAMSDITFITSOSFLTFOSOPRNEQSBL

2811/24/2012


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CC TRNG THI SBL

2911/24/2012


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CC TRNG THI SBL

OPR (OPeRator):

+ oi tng b lock bi ngi van hanh.

+ No khong the thc hien c chc nang cua no.

IT (In Traffic)

+ oi tng nay ang san sang thc hien tat ca cac chc nang.

+ Dch vu c cung cap la chap nhan c.

3011/24/2012


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CC TRNG THI SBL

FIT (Faulty In Traffic)

+ oi tng nay ang san sang thc hien cac chc nang cua no trong

che o han che.

+ Mot loi khong quan trong a c phat hien.

FLT (FauLTy out of service)

+ Mot loi nang c phat hien.

+ Dch vu la khong san sang.

+ oi tng co kha nang t phuc hoi.

FOS (Forced Out of Service)+ Mot loi nang c phat hien.

+ Dch vu la khong san sang.

+ oi tng khong co kha nang t phuc hoi.

3111/24/2012


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CC TRNG THI SBL

UT (Under Test)

+ oi tng ang c kiem tra bi cac tien trnh t ong.

+ Dch vu la tam thi khong san sang.

SOS (System Out of Service)

+ oi tng khong the thc hien cac chc nang cua no v oi tng

cha la ngoai trang thai dch vu.

EF (External Failure)

+ oi tng khong the thc hien cac chc nang cua no v phan tlien ket hoat ong khac la ngoai trang thai dch vu.

3211/24/2012


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CC TRNG THI SBL

NEQ (Non EQuipped): oi tng cha c cau hnh

WTC (Wait for Traffic Clear)

+ Trang thai nay lien ket vi thong so nh th WTC (Wait Traffic Clear)

+ Lu lng tiep tuc en khi bo nh th WTC tran

MSD (Maintenance SeizeD)

Trang thai nay ch th mot hoat ong kiem tra ang chay tren SBL tng

ng

MSD AUTO (Maintenance Seized Autonomously)Trang thai nay ch th rang mot hoat ong t ong kch bi he thong

ang chay tren SBL tng ng

3311/24/2012


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QUAN H PH THUC GIA CC SBL

Trng hp (1) AIT/FIT nu B IT/FIT

A SOS khi Bb li (FLT, FOS, OPR, SOS, EF)

Trng hp (2) AIT/FIT nu t nht B orC IT/FIT

A l SOS khi B v Cb li (FLT, FOS, OPR, SOS, EF)

B

A

ANDC

A

B

ORParent SBL

Child SBL(1) (2)

3411/24/2012


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CC LNH VN HNH TRN SBL

Lay ve trang thai SBL.

Cho phep thiet lap mot chc nang. Lenh

nay ap at tren mot SBL c cam trc

o.

Tch cc lai chc nang cua

mot SBL.

Khi s kch hoat c

thc hien thanh cong, SBL co the quan

ly c chc nang cua no.

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No cho phep cam chc nang cua mot SBL.

Ngan chan chc nang cua mot SBL ch va loc cac canh bao.

Thong so WTC ch ra khoang tre cua s thc hien lenh.Lu lng co the b dng hoan toan.

Tnh huong (Context) b mat (cuoc goi/bao hieu).

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Cho phep khi ong lai mot chc nang.

Xay dng mot chc nang c ho tr bi SW ma khong can

download SW.

Tnh huong c gi.

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Cho phep cam hoac thiet lap mot chc nang theo mot trnh t.

Thoat khoi tnh huong khi ap ng la ang nghi ng, khong

chac chan.Lenh nay co the c coi la s ket hp cua Disable va Init.

Tai xuong phan mem SW va d lieu.

Tnh huong b mat (cuoc goi va bao hieu).

3811/24/2012


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CC LNH VN HNH SBL

2. SELF-TESTS

3. SOFTWARE DOWNLOADING

6. CONFIGURATION DOWNLOADING/ DATA BASE SYNCHRONISATION

1. BOOTSTRAP

4. SOFTWARE START-UP

5. NON-DESTRUCTIVE TESTS

7. FUNCTION START-UP

INIT

RESTART

RESET

DISABLE39

11/24/2012


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BTS & OMU START-UP; RESET, RESTART

Lu tng qutBTS Start-up & Init

Restart BTS SBL

Restart OMU SBLOMU Auto Restart

Reset BTS SBL

Reset OMU SBL

OMU Auto Reset

4011/24/2012


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LU TNG QUT

SUM Boostrap

Khi ong BTS/OMU

Tai xuong SUM SW

Khi ong SUM SW

Lydo khi ong, Resethoac khi ong lai

Tai xuongcac file BTS

OMU-CPF

Khiong

lai

Cau hnhlai BTS

Tang boem t khi

ong lai

Tai xuongOMU-CPF

Tch cc SW Tnh huong

khoi phuc BTS

Cau hnh

lai BTS

Bao cao lydo khi ong hoac khi ong

lai (do loi, lenh ieu khien)

BTS Operational

(1), (6), (7), (8)

(2) (3) (4) (5)

Lydo khi ong

(1)

Lydo khi ong lai(2), (3), (4), (5)

Lydo khi ong lai

(6), (7), (8)

(1) ong ien BTS / SUM.

(2) Khi ong lai BTS.

(3) Khi ong lai OMU.

(4) OMU t ong khi ong laikhong can s thay the OMU-

CPF.

(5) OMU t ong khi ong lai

vi s thay the OMU-CPF.

(6) Reset BTS.(7) Reset OMU.

(8) OMU t ong Reset.

4111/24/2012


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BTS START-UP & INIT

BSC OMU FW TRANS & CLOCK FW MODULES

Tong kiem traOMU/SUM FW

Tong kiem tra TRANS FWTong cau hnh

Chuyen oi cau hnh Abis

Ket noi BSC

BTS/OMU/SUM c khi ong

Tai xuong BTS Master File

Tai xuong OMU/SUM FW/SPF (Neucha cotrong EPROM)

Tai xuong cac goi BTS khac (Neucha cotren EPROM)

Tai xuong file OMU - CPF

Tch cc SW SW ACTIVATE (Cap BTS)

Chthloi BTS

Cac hoat ong sau khi OMU/SUMhoac BTS ong ien, (tong) khi

ong lai, (tong) Reset

1

2

3

Step 1

Step 2

4211/24/2012


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BTS START-UP & INIT(CONT)

SUM/MSUM Start-up

SUM Autotest and Bootstrap

Chuyn i cu hnh Abis

Chc nng O&M yu cu cu hnh Abis t chc nng

truyn dn thit lp kt ni vi BSC. Bao gm v trca OML, RSL, cc TCH trn lung Abis.

Chuyn i cu hnh BSII (Base Station InternalInterface)

Kt ni BSC

Thit lp lin kt LAPD OML vi BSC

Gi thng ip BTS/OMU Started

1

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Software Download

BTS Master FileCha danh sch tt c cc file cn thit cho BTS, cc fileny c gi l cc gi phn mm BTS (BTS SoftwarePackage)

SUM Software DownloadChc nng trn SUM s thc hin so snh cc file trongBTS Master File v cc file c lu trong Flash-EPROM thc hin download cc file cn thit t BSC.

Download cc gi phn mm khcBSC gi en OMU d lieu cau hnh phan cng va logic lay t c s d lieu

BSS (DLS - BSS Database) thong qua mot so thong iep d lieu cau hnh (CDM -

Configuration Data Massages)

2

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Khi to phn mm

BSC OMU FW MODULES

Khi ong IOM_CONFBroastcast bang SW

BTS_SW_ACTIVATE_REQ

BTS_CONF_REQ

BTS_CONF_DATA

Khi tao SW cap OMU (SBL): Khoi phuc tnhhuong BTS; Cau hnh lai cac modules BTS

BTS_CONF_COMPL

BTS_SW_ACTIVATE_REPORT

Khi tao SW cap BTS (SBL): Khi tao cacmodules BTS

3

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RESTART BTS SBL

BSC OMU FW MODULES

Ngt kt ni BSC vaIOM

Ket noi BSC

Khi ong IOM_CONF

Broadcast

Khi ong lai SUM SW

BTS_CONF_REQUEST

BTS_ACK

BTS_CONF_DATA

BTS_ACK

Phuc hoi tnh huong BTS

Khi ong lai BTS (khi tao cac Modules BTS)

BTS_CONF_COMPL

BTS_ACK

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RESTART OMU SBL

BSC OMU FW MODULES

Ngt kt ni BSC vaIOM

Ket noi BSC

Khi ong IOM_CONFBroadcast

Khi ong lai SUM SW

BTS_CONF_REQUEST

BTS_ACK

BTS_CONF_DATA

BTS_ACK


Khi ong lai OMU (Cau hnh lai cac Modules BTS)

BTS_CONF_COMPL

BTS_ACK 4711/24/2012


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OMU SBL AUTO RESTART

BSC OMU FW MODULES

Ngt kt ni BSC vaIOM

Ket noi BSC

TangOMU_Autorestart_Count

Khi ong lai SUM SW


Hoat ong sau OMU hay BTS Power-up, (auto) Restart, (auto) Reset

Lu lai trang thai ban au

Khi ong IOM_CONFBroadcast

Chthloi BTS

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RESET BTS SBL

BSC OMU FW MODULES

BTS Reset: Reset tat cacac modules lien quan

Ket noi BSC

Download Master file,SUM SW/SPF

SUM c khi ong quaBootstrap

Khi tao SW (cap BTS)

SUM Autotest


BTS/OMU c khi ong

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RESET OMU SBL

BSC OMU FW MODULES

Ket noi BSC



Khi tao SW (cap OMU)

SUM Autotest


BTS/OMU c khi ong

Ngt kt ni BSC vaIOM

5011/24/2012


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AUTO RESET OMU SBL

BSC OMU FW MODULES

Ngt kt ni BSC vaIOM

Ket noi BSC



Khi tao SW (cap BTS hay OMU)

Hoat ong sau OMU hay BTS Power-up, (auto) Restart, (auto) Reset

Lu lai trang thai ban au

Chthloi BTS

SUM Autotest


5111/24/2012


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BTS TERMINAL

Chc nng BTS Terminal Ket noi BTS Terminal

a BTS vao hoat ong

Thay SUMA

Thay TRE Thay ANC

Kiem tra luong

5211/24/2012


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CHC NNG BTS TERMINAL

BTS Terminal thc hin cc chc nng qun l cc

b nh sau: Gim st cnh bo

Gim st s kin, trng thi

Thu thp p ng ca h thng Thc hin cc hat ng khi to

Xem cc bo co lin quan vi cc hat ng thc hin

5311/24/2012


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KT NI BTS TERMINAL

COMMTE COMMTE

5411/24/2012

PCBTS TER2

5

3

2

5

3

FEMALEMALE

Cap ket noi RS-232


55/71

CC MENU CHNH

5511/24/2012

CC C


56/71

CC MENU CHNH

5611/24/2012

CC MENU CHNH


57/71

CC MENU CHNH

5711/24/2012

A BTS VO HOT NG


58/71

A BTS VO HOT NG

1. Download BTS Sofware

Trc khi download phan mem cho BTS phai am bao BTS khong c noi

vi BSC (Ngat ket noi Abis)

Chn:Download 02 file: BTS Master File (*.MSF), CPF File (*.DDL)

Mot so thong iep se hien th the hien qua trnh download.

i en khi ca so Edit Frequencies

Chon bang tan: GSM900/DCS

Chon neu co Chon

5811/24/2012

A BTS VO HAT NG


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A BTS VO HAT NG

2. Thiet lap Anten mapping

Chon: Commissioning Sector Check

5911/24/2012

A BTS VO HAT NG


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A BTS VO HAT NG

3. Khi tao BTS

Chon

4. Thc hien thong ke card BTS

Chon Show Remote Inventory...

6011/24/2012

A BTS VO HAT NG


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A BTS VO HAT NG

5. Kiem tra cap RF

Chon

6111/24/2012

A BTS VO HAT NG


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A BTS VO HAT NG

6. Kiem tra va test th External Alarm

Chon

7. Kiem tra trang thai cua tat ca cac card

Chon

8. Kiem tra suy hao anten, feeder (VSWR)

Chon

9. Kiem tra accu

10. Ket thuc commissioning

Chon

Click

File --> Save As... Chn tn file v lu li lm h snghim thu.

6211/24/2012

A BTS VO HAT NG


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A BTS VO HAT NG

11. Thit lp truyn dn cho BTSo Chn

Thiet lap a ch Qmux.

o Ket noi BTS vi BSC: Ket noi Abis cho BTS

o Kiem tra trang thai cua OML

6311/24/2012

THAY CARD SUMA


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THAY CARD SUMA

1. S dung BTS Terminal ghi lai cac thong tin: Trang thai cac SBL, cac canh

bao, a ch Q1 cua SUMA2. Upload thiet lap truyen dan UT_TR_CLK_33 t BTS

3. S dung BTS Terminal disable BTS_TELx SBLs cua tng cell vi WTC=3, am

bao cac SBL BTS_TEL la OPR trc khi thc hien bc ke tiep.

4. Disable cac SBL RAx cua tng cell, am bao cac SBL RAx la OPR trc khithc hien bc tiep theo.

5. Thao cac ket noi vi SUMA, va thao card SUMA.

6. Lap card SUMA thay the

7. Ket noi BTS Terminal (Khong gan cac cap khac vao)

8. S dung BTS Terminal at a ch Q1 cho SUMA

6411/24/2012

THAY CARD SUMA


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THAY CARD SUMA

9. Ket Area Flat cable va Abis Si

10. i en OMU tren SUMA ngng chp tat (sau 5 en 10 phut, sau khisoftware c download)

11. Dung BTS Terminal khi tao cac SBL RAx cho moi cell, am bao cac SB

RAx la IT trc khi tien hanh bc tiep theo

12. Dung BTS Terminal khi tao cac SBL BTS_TELx cho tng cell, am baocac SB BTS_TELx la IT trc khi tien hanh bc tiep theo

13. S dung BTS Terminal kiem tra trang thai cua tat ca cac SBL, canh bao.

6511/24/2012

THAY CARD TRE


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THAY CARD TRE

1. Ket noi BTS Terminal vi BTS

2. Neu TRE can thay la TRE cuoi trong cell, Disable BTS_TEL tng ng viWTC = 3 phut. Neu TRE khong phai la TRE cuoi trong cell, tiep tuc bc

3

3. S dung BTS Terminal disable TRE SBL.

4. Xac nh TRE loi, tat cong tac nguon va thao TRE loi.

5. Lap TRE thay, noi cap va bat cong tac nguon cua TRE.

6. Dung BTS Terminal Init TRE SBL va sau o la BTS_TEL tng ng neu no

c Disable trc o.

7. Kiem tra trang thai cua tat ca cac SBL, am bao khong co canh bao

trong BTS.

6611/24/2012

THAY CARD ANC


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THAY CARD ANC

1. Ket noi BTS Terminal

2. S dung BTS Terminal disable BTS_TEL tng ng vi RA loi, vi WTC = 3.

3. S dung BTS Terminal disable SBL RA loi.

4. Thao ANC loi, va thay the ANC mi.

5. S dung BTS Terminal Init SBL RA va sau o la BTS_TEL

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KIM TRA LUNG


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KIM TRA LUNG

o : Mat tnh hieu en 2Mbit/s tren lien ket Abis.

o : Giao tiep Abis nhan c tn hieu AIS (Alarm Indication Signal)

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KIM TRA LUNG


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KIM TRA LUNG

o : CRC trong a khung (multiframe ) tren lien

ket Abis b mat. Co the do au xa khong dung CRC hoac donhieu tren ket noi.

o : Mat ong bo khung tren lien ket Abis.

o : Toc o loi bit cua tn hieu en tren

lien ket Abis vt ngng 1E-3, 1E-4, 1E-6.

o : Mot nhan dang canh bao t au xa c phat hien.

au xa a at bit RAI (Remote Alarm Indication ) trong TS0 hoac bit F

trong TS1 .. 31 nham ch ra cac van e ve nhan tn hieu.

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THUT NG VIT TC


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THUT NG VIT TC

CPF Configuration Parameter Data File

CCF Cabinet Cooling Fan

EACB External Alarm Connection Board

CLLK Clock Link

RA Radio Access

IOM Internal O&M Link

WTC Wait for Traffic Clear

RSL Radio Signalling Link

LAPD Link Access Protocol on the D channel

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THANK YOU FOR YOUR

ATTENTION

hoi thao bts alcatel2

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