VDSL

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VDSL (Very high bit rate DSL)

• AST-VDM8000
• (VDSL DSLAM)

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• International Standards of VDSL
• Introduction of AST-VDM8000
• VDSL Network Design

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International Standards of VDSL
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Overview of VDSL

• Very high bit rate Digital Subscriber Line
• More speed than ADSL solution
• Provide Data service Multimedia service
  through same telephone line
• Standardization will be applied ANSI, ETSI
• System requirement
• - Support of specific rates over specific
  lengths
• - Resistance to interference and noise
• Speed
• - Asymmetric Down stream 26 52Mbps, Up
  stream 3 6Mbps
• - Symmetric 13 26Mbps

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Realization method of VDSL

• CAP-QPSK

• DMT

• DWMT

• SLC

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Standardization
VDSL Coalition Group
QAM
SCM
CAP
Nokia, Siemens, Lucent Technology, Broadcom,
Globespan, Bosch Telecom, Metalink, Next Level,
Newbridge Networks ? 24??
VDSL Alliance Group
FMT
DMT
MCM
Alcatel, Ericsson, IBM, Nortel, Texas
Instruments, US West, Cadence NEC America etc.
18 companies

• ANSI, ETSI 2002 will be standardization

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Channel Separate
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VDSL Framer
Total 261 bytes Payload 236 bytes
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Payload data rate calculation
The Payload Data Rate (PDR) is calculated from
the Line Rate considering the VDSL Frame Overhead
Factor kOverhead kOverhead payload / frame
length 236 bytes / 261 bytes 0.904 The
resulting payload data rate is calculated as
follows PDR Line Rate x kOverhead Example
PDR 11.25 Mbps x 0.904 10.17 Mbps
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Data rate Distance
Distance
Bandwidth
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Introduction of AST-VDM8000
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AST-VDM8000 Benefit

• Hardware and Software provided Apsuns own
  technology
• Home PNA product developing / supplying
• Passed KT BMT, Dream Line BMT function test
• Perfect understanding of installation site
  circumstance
• Specialized technology to meet recent market
  trend
• Experience for maintenance and installation

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AST-VDM8000 Strength

• Comply VDSL international standard by QAM method
• Provide Total Solution through product line -up
• Use existing telephone line in the building
• Transmit Voice and Data at the same time
• Provide 13Mbps / 26Mbps Speed
• Provide Ethernet standard

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AST-VDM8000 Feature

• Max. distance 1.2Km at 13Mbps
• Compact size and high accumulation (Max. 130
  Ports)
• Excellent expansion ability (unit 10 Ports /
  Board)
• Hot Swap (Board based swap) function
• Dual Power Supply (Redundancy)
• Easy installation (standard 19 Rack mountable)
• Improve reliance in management and maintenance
• Use SNMP for NMS function
• Manage individual subscriber (Port On/Off)

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AST-6000 Main Specifications
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AST-VDM8000 Specification
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Management system

• Management Software
• - WEB based Management
• - Telnet, CLI
• - RS232C Console
• - TFTP image upgrade
• - Remote Auto Software upgrade
• - System configuration
• Management Functions
• - Self Diagnostics
• - Operating Statistics
• - Auto Fault reporting
• - SNMP, RMON, Ethernet MIB
• - VLAN
• - Packet Filtering

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AST-VDM8000 System Layout Front
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AST-VDM8000 System Layout Rear
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AST-VDM8000 Board Layout
Telco Cable Wrapping / RJ-11 etc. various types
available
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AST-VDM8000 Air flow
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Additional Specification

• Main Switch and Management Board
• - Gigabit Uplink interface 2 Ports (1 Port
  Option)
• - 100Mbps 6 Channel Trunk Port
• - Channel Board Management
• Channel Board
• - Port based VLAN
• - MAC Filtering

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Support Protocol

• IGMP(Internet Group Management Protocol) V1 / V2
  Snooping
• STP (Spanning Tree Protocol)
• Port Trunking
• Broadcast storm control
• DHCP (Dynamic Host Configuration Protocol)
• IP Unicast / Multicast
• TCP / IP
• HTTP (Hyper Text Transport Protocol)
• SMTP (Simple Mail Transfer Protocol)
• FTP (File Transfer Protocol)

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VDSL Network Design
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VDSL Network Exam.
VDSL Modem
AST-VDM8000 VDSLAM
Telephone
Computer
PSTN PBX
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IP based VDSL Network configuration
MDU
CO
Customer
Voice
Apartment
VDSL
Router
Leased line
.
Ethernet
Apartment
Switching Hub
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ATM based VDSL Network configuration
Passive optical splitter 32 / 48 / 64
TDM frame - ATM cells 622/155 Mbps

• SONET Synchronous Optical NETwork
• SDH Synchronous Digital Hierarchy
• DWDM Dense Wavelength Division Multiplexed
• OLT Optical Line Termination

ONT
OLT
NT
ONU
NT
SONET SDH DWDM
ATM burst mode Time Division Multiplexing 155 Mbps
NT
VDSL over copper 13Mbps-26Mbps
2.5/10 Gbps
Distribution 2-5KM
1KM
Feeder 15-18KM
Up to 20KM
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End Thank you ! Have a good time