Transcript Document

Optical Fiber Access Network OFAN&
ZXA10
Presented By:
Ammara Khan Baloch
Table of Contents
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Why AN?
Definition of AN
Structure of AN
Definition of OLT
Structure of OLT
Definition of ONU
Structure of ONU
Modules of ONU
Build-in SDH
Why we need Access Network?
1）The reason of technology
Mostly, it is because of digital transfer system,
especially, the optical transfer system.
2）The reason of Market requirement
For the Operation and Maintenance.
3） The reason of competition
The telecom company want to get cheaper
system.
Definition of Access Network
Telecom Management
Network (TMN)
Q3
UNI
SNI
Access Network
（AN）
Service Node
（SN）
AN: the transmission entity between the SNI and UNI;
SNI: Service Network Interface;
UNI: User Network Interface;
ADSL
ZXA10-OLTB
IP
ONUB
ONUB
ONUB
ISDN
SDH
DDN
POT S
V5
PSTN
ATM
Service Nodes
Ethernet
Access network
DDN
user Nodes
Definition of Access Network
• OFAN serves as the junction between Local Exchange (LE) and
the subscriber terminal equipment, and is connected to LE
through the service network interface.
Structure of Optical Fiber Access Network
The functional structure of OFAN is:
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Access Network (AN)
Optical Line Terminal (OLT)
Optical Network Unit (ONU)
Network Management System (NMS)
Definition of OLT
• OLT function is to provide OFAN with the interface between the network
side and the LE, and to communicate with ONU of the subscriber.
• “Interface b/w an optical line and the network”.
• OLT can completely isolate the switching function of LE from the
subscriber access.
• OLT is placed at the exchange end together with LE.
• OLT is connected to multiple ONU’s that can be used in networking of
point-to-point, chain, and ring network.
• Large capacity OLT equipment with 19’ rack structure;
• High integration density ODT board, with 8 E1 per card and 120 E1 per
module. All these E1 can be assigned to connect V5 or ONU as per actual
requirements;
ZXA10-OLTB
Concentration ratio can be adjusted freely to meet
different traffic model;
High performance multi cpu system, can meet the high
traffic requirements;
Single module provides 10240 lines and for single rack
3 modules can be mounted together to provide more lines;
Main boards, such as MP, SSU, are working in
master/slave mode, to provide high reliability.
Features are:
•Hubbing
•Multiplexing
•Cross-Connection.
ZXA10-OLTB
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MP
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For expansion
purpose, this
sub rack can be
added and these
POTS cards are
optional.
•This is the common module of OLTB system which consist of 2
sub racks; and for V5 system, only this module is required;
• Single module OLTB (full configuration) supports 10240 POTS.
•ZXA10 supports multi-module smooth expansion, a standard
2M rack with 3 modules supports 30720L (each sub rack height
is 6U and the rack height is 42U).
Structure of OLT
MSTP layer
Control layer
Trunk layer
BDM layer
CSV layer
Built-in transmission
system
Narrowband service
process layer
Broadband service
process layer
Built-in environment
detectors
Fan layer
Battery layer
Built-in
power supply
Hardware Structure of OLT
On OLTB, there are three layers:
• Control layer (MCTLB )
• ODT layer( MODT)
•
Subscriber layer (MALC).
The board configuration of MCTLB:
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ZXA10-OLTB: MPB
1. Two MPs work in hot backup
mode
2. MPB is the central processor of
the entire POTS service element
3. MP store all the alarms and
configuration data.
4. Communicate with boards
such as ODT and SSU.
5. Implementing data
synchronization and monitoring
the working status of the other.
6. Provide the system operation and
maintenance function.
ZXA10-OLT: SSU
1. Two SSU Cards work in hot
backup mode
2. Clock synchronization functions
3. N*64K cross-connection functions
4. Conference call functions With the
switching capability of 4K*4K
ZXA10-OLT: ODT
1. 1 ODT Card provide 8 E1
2. The V5 signaling channels
configured in different two ODT
Card redundancy
3. Any one E1 can be configured as
required
a) V5 interface connecting with LE
b) Normal E1 connecting POTS
module
ZXA10-OLT: POWERH
POWERH outputs 4 voltages:
+5VA(D),
–5VA,
-48V
Ringing current 75VAC (hot
backup mode)
The board configuration of MODTB:
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The board configuration of subscriber layer:
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TRK:
• At OLT side, TRK is used in ZXA10 to connect to switch.
• At ONU side ALC is used to connect to ordinary subscriber
telephone set, expanding Z interface.
• There are 16L in one TRK board.
TPU
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TPU is the main processor board of ZXA10 SU2 user unit.
At maximum one TPU can control 12 subscriber boards.
TPU can provide at most four 4 E1 interface.
Two TPU serves as backup for each other. 2 TPU work in load
sharing mode to manage subscriber boards.
Definition of ONU
• ONU is used to provide OFAN with interface
at the subscriber side.
• ONU is connected to number of subscriber
terminals.
• ONU is capable of optical-electrical
conversion.
• Maintenance and monitoring functions.
• ONU is placed in the vicinity of subscriber.
• ONU is the equipment used to implement
FTTB, FTTC and FTTZ.
• ONU provide various interface to connect to
the subscribe, support various subscriber
terminal such as POTS, ISDN and leased line.
Structure of ONU:
• ONU is composed of
– Processing Nodes
– Transmission Nodes
ONU
Transmission node consist of following type:
• Built-in 155M/622M SDH optical transmission
equipment
• ATM broadband transmission equipment
ZXA10 OFAN provide build-in SDH optical
transmission systems:
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ZXA10-AS1
ZXA10-AS2
ZXA10-S200
ZXA10-S300
• ONU consist of following cards:
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SU (Subscriber Unit)
ALC (Analog Subscriber Card)
DLCA (Digital Subscriber Card)
TPU ( Main processor board)
POWERH (Power board)
TSLC (Subscriber line test board)
AUDB (2/4 Audio board)
DLC
HLC (Hotline board)
HSB
DIB (64K G.703)
Analog Subscriber Board (ALC):
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ALC is used to provide the analog subscriber Z interface.
Implements POTS service.
Providing 32 subscriber lines
Most popular card in ZXA10.
1 SU can be inserted with up to 12 ALC’s.
Basic functions are:
B_Battery feeding function
O_Over Voltage Protection
R_Ringing function
S_Supervision Function
C_Codec function
H_Hybrid function
T_Test function
2B+D Digital Subscriber Board (DLCA):
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Provide 2B+D interface
1 DLCA = 8 ISDN sub
2/4 wire conversion
Over voltage protection
Offer test interface
Self –loop testing
Remote power supply.
2/4 Wire Audio Board (AUDB)
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It is used to convert analog signal into digital signal.
Convert audio and data into digital form
Provide 8 voice ports.
Output/input levels are adjustable through software.
Provide two transmission modes
– 2 line
– 4 line
Hotline board (HLC):
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Resembles semi-permanent leased line service.
One HLC provide hotline interface , plugged with ALC in SU unit.
1 HLC = 8 hotlines
FLC card:
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FLC is used to support the public payphone subscribers.
Each board can support 16 sub lines.
ADSL subscriber board
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ADLG board is used for providing ADSL service.
Each ADLG board support 16 ADSL subscriber.
Each ADLG support 4 uplink E1 interface.
Subscriber line test board (TSLC):
• There are mainly two test boards used in ZXA10-SU.
– TSLCB
– TSLCC
• TSLCB is used for analog subscriber lines and terminals
• TSLCC is used for digital tests on ISDN in addition to tests on
ordinary analog subscribers.
• Test boards has the following functions:
– Test of external line
– Test of internal line
– Test of subscriber telephone
Multi Service Access Model
OLT: Optical Line Terminal; ONU: Optical Network Unit.
ZXA10 ONU Module
OUT40
OUT30
IN/1500
ONU200
OUT50
ZXA10-IN1500
Transmission Unit
SU2 * 4
MDF
CSV
Rectifiers
ODF
Back-up Batteries
Front view
2000*800*650 mm 200KG
Side-view
RT: ZXA10-IN1500
Indoor model ONUB equipment, 19’ rack with height 42U;
ZXA10-SU2 can provide multi service access function:
POTS
ISDN-BRA 2B+D
ISDN-PRA 30B+D
E1 Leased Line
V.35/V.24/G.703 (64Kbps, n*64Kbps, and Sub rate –
19.2Kbps, etc.)
ADSL Interface
SHDSL Interface
10M/100M Ethernet
Accuracy remote line test function is provided;
For transmission system, ZXA10-AS1/AS2 or any other
SDH/PDH/ATM system can be adopted;
Large capacity, standard configuration with 4 ZXA10-SU2 is
1536L and the maximal configuration with 7 ZXA10-SU2 is 2688L;
Built-in MDF is provided.
RT: ZXA10-IN1500
ZXA10-SU2
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POTS
4 sub rates
or 64Kbps
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SHDSL
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8 ISDN
BRA
8 ports
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Line
test
8 ADSL
19’ sub rack with 6U height;
2 TPU are working in mutual aid mode;
All the subscriber slots are common (yellow), the boards can be
interchanged;
The ZXA10-SU2 can be used in every kinds of ZXA10-ONUB system;
so all services which can provide can be provided in each ONUB system
also.
RT: ZXA10-OUT30
 Rack Dimension：
1920mm*1350mm*710mm
(H*W*L)
 Net weight 200kg, full
configuration weight 300kg
 Temperature:
-35℃～+55℃
 Relative Humidity：
5％～95％
 AC Consumption：
1500W(refrigeration)，
400W(calefaction)
 Capacity:
2 ZXA10-SU2: 768L
3 ZXA10-SU2: 1152L
Air Conditioner
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100AH
Battery
Built-in SDH
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6U
6U
Order
wire,
MDF,
And so
on
6U
15A Rectifier
1U
1U
1U
1U
2U
15A Rectifier
2U
Fiber insertion box
Fan
Fake panel
CSV
ZXA10-ONU200
1 2 3 4 5 6 7 8 9 10
–Rack Dimension:
1300mm×810mm×3
77mm (H×W×L)
–Net weight 90kg,
full configuration
weight 160kg
–Temperature:
– 0℃～45℃
–Relative Humidity:
– 20％～80％
–Indoor model
–Wall-mounted or
Ground-mounted
–Capacity: 192L
FAN
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ZXA10-SU2-C
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RECTIFIERE、CSV、AS2
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24AH BATTERY
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POWER D
24AH BATTERY
ZXA10-OUT40
注
意！
高压危险
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电源分配器
Rack Dimension: 1450mm×1500mm×500mm (H×W×L)
Full configuration weight: 250kg
Temperature: -35℃～55℃
Relative Humidity: 5％～95％
Outdoor model and Ground-mounted or pole-mounted
Capacity: 1 ZXA10-SU2 384L (ZXA10-AS1); 2 ZXA10-SU2 768L (ZXA10-AS2)
Built-in SDH: ZXA10-ASx
– Built-in SDH system
• ZXA10-AS1, maximum 126 E1s per NE (double STM-1
configuration), normally used in COT side;
• ZXA10-AS2, maximum 10 E1s, compact STM-1 system,
normally used in RT side to reduce the cost;
• ZXA10-AS3, maximum 8 E1s;
• ZXA10-AS4, STM-1/STM-4 combined system, can be
configured dynamically as per the actual requirements,
normally used in COT side with multi-layer networking
requirement.
BUILT-IN SDH: ZXA10-AS1
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T T T T T T T T D D O O N U
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2 optical STM-1 port per OL card
SCU provide synchronization clock
DXC provide 4*STM-1/VC12 fully cross
TRU provide 16 2M (Max) in each card
NS main control card
in case of it fail under power on,
no affection to whole system
• Normally, it is used in COT side
BUILT-IN SDH: ZXA10-AS2
19 Inch, 1 U, Compact STM-1 system
2 Optical Interface (west and east), 10 E1
BUILT-IN SDH: ZXA10-AS3
19’ and 2U box, compact design;
2 optical direction and 8 E1;
It can be used in the system which
capacity is not so big and does not need
more than 2 optical directions;
Normally, in AN system we propose the
ZXA10-AS2 instead of this one.
BUILT-IN SDH: ZXA10-AS4
ZXA10-AS4 is STM-4/STM-1 combined compact SDH system, which
adopts the ZXSM-600 (V2) technology;
19’ and 4U chassis;
Supporting many kinds of service, E1/E3 or T1/T3 or STM-1 can be
configured as per the actual requirement;
Normally, it is used in COT side where the requirements are very high,
for example, more E1s, more optical directions or both STM-1 and STM-4.
telephone service
OLTB STRUCTURE
ONUB STRUCTURE
SDH/ATM
SDH/ATM
ALC
ODT
DDN
DDN
TPU
SSU
ISDN
PSTN
LE
E/P Dog
ODT
MP
NM
TSLC
Voice
Service Realization Diagram
AT
COT
STM-1
SDH
SDH
OLTB
SU2
2M
LE
2M
Home/Office
V5.2
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ISDN – V5
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P
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A
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ISDN NT1/NT PLUS
Twisted pair
PC
Telephone
THANK YOU!