Optical Fiber Access Network OFAN

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Optical Fiber Access Network OFAN ZXA10

• Presented By
• Ammara Khan Baloch

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Table of Contents

• 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

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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.

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Definition of Access Network
AN the transmission entity between the SNI and
UNI SNI Service Network Interface UNI User
Network Interface
5
100BASE-T
ZXA10-OLTB
IP
DDN
POT S
V5
PSTN
Ethernet
ATM
user Nodes
Service Nodes
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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.

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Structure of Optical Fiber Access Network

• The functional structure of OFAN is
• Access Network (AN)
• Optical Line Terminal (OLT)
• Optical Network Unit (ONU)
• Network Management System (NMS)

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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 ONUs 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

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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.

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ZXA10-OLTB
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).

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Hardware Structure of OLT

• On OLTB, there are three layers
• Control layer (MCTLB )
• ODT layer( MODT)
• Subscriber layer (MALC).

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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 boardssuch as ODT and SSU.
5. Implementing data synchronization and monitoring
   the working status of the other.
6. Provide the system operation and maintenance
   function.

???
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ZXA10-OLT SSU

1. Two SSU Cards work in hot backup mode
2. Clock synchronization functions
3. N64K cross-connection functions
4. Conference call functions With the switching
   capability of 4K4K

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ZXA10-OLT ODT

• 1 ODT Card provide 8 E1
• The V5 signaling channels configured in different
  two ODT Card redundancy
• Any one E1 can be configured as required
• a) V5 interface connecting with LE
• b) Normal E1 connecting POTS
  module

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ZXA10-OLT POWERH
POWERH outputs 4 voltages 5VA(D), 5VA,
-48V Ringing current 75VAC (hot backup mode)
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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
• 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.

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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.

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• 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

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• 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
• ZXA10-AS1
• ZXA10-AS2
• ZXA10-S200
• ZXA10-S300

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• ONU consist of following cards
• 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)

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• Analog Subscriber Board (ALC)
• 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 ALCs.
• 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

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• 2BD Digital Subscriber Board (DLCA)
• Provide 2BD 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)
• 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

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• Hotline board (HLC)
• Resembles semi-permanent leased line service.
• One HLC provide hotline interface , plugged with
  ALC in SU unit.
• 1 HLC 8 hotlines
• FLC card
• FLC is used to support the public payphone
  subscribers.
• Each board can support 16 sub lines.
• ADSL subscriber board
• ADLG board is used for providing ADSL service.
• Each ADLG board support 16 ADSL subscriber.
• Each ADLG support 4 uplink E1 interface.

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• 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

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Multi Service Access Model
OLT Optical Line Terminal ONU Optical Network
Unit.
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ZXA10 ONU Module
OUT40
OUT30
IN/1500
ONU200
OUT50
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ZXA10-IN1500
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RT ZXA10-IN1500

• Indoor model ONUB equipment, 19 rack with height
  42U
• ZXA10-SU2 can provide multi service access
  function
• POTS
• ISDN-BRA 2BD
• ISDN-PRA 30BD
• E1 Leased Line
• V.35/V.24/G.703 (64Kbps, n64Kbps, 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.

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RT ZXA10-IN1500
8 ports

• 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.

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RT ZXA10-OUT30

• Rack Dimension1920mm1350mm710mm(HWL)
• Net weight 200kg, full configuration weight 300kg
• Temperature
• -35?55?
• Relative Humidity
• 595
• AC Consumption1500W(refrigeration),400W(calefacti
  on)
• Capacity
• 2 ZXA10-SU2 768L
• 3 ZXA10-SU2 1152L

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ZXA10-ONU200

• Rack Dimension 1300mm810mm377mm (HWL)
• Net weight 90kg, full configuration weight 160kg
• Temperature
• 0?45?
• Relative Humidity
• 2080
• Indoor model
• Wall-mounted or Ground-mounted
• Capacity 192L

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ZXA10-OUT40

• Rack Dimension 1450mm1500mm500mm (HWL)
• Full configuration weight 250kg
• Temperature -35?55?
• Relative Humidity 595
• Outdoor model and Ground-mounted or pole-mounted
• Capacity 1 ZXA10-SU2 384L (ZXA10-AS1) 2
  ZXA10-SU2 768L (ZXA10-AS2)

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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.

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BUILT-IN SDH ZXA10-AS1

• 2 optical STM-1 port per OL card
• SCU provide synchronization clock
• DXC provide 4STM-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

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BUILT-IN SDH ZXA10-AS2

• 19 Inch, 1 U, Compact STM-1 system
• 2 Optical Interface (west and east), 10 E1

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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.

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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.

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telephone service
ONUB STRUCTURE
OLTB STRUCTURE
SDH/ATM
SDH/ATM
ALC
Voice
ODT
TPU
SSU
DDN
DDN
ISDN
E/P Dog
PSTN
ODT
LE
MP
TSLC
NM
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Service Realization Diagram
ISDN V5
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THANK YOU!