LinkStar Series System


ViaSat LinkStar Satellite Internet

satellite internet viasat
 LinkStar™ - Bringing 
LinkStarT is the highest performance, star-based VSAT system for service providers, ISPs, and corporate network managers who are seeking a system based on DVB standards. LinkStar's edge is in its dynamic bandwidth allocation that makes it more efficient and faster than other TDMA systems. Terminals can transmit data to the network hub at speeds up to 1.15 Mbps, with data downloads of up to 60 Mbps, satisfying bandwidth-intensive applications using IP data.

LinkStar offers several benefits:

  • The highest return channel rate on the market
  • Rate-based operation that increases your data throughput
  • Guaranteed information rates for each network location
  • Lower-cost terminals because fewer hardware components are needed and volumes increase as markets expand
  • DVB standards based for compatibility worldwide
LinkStar can operate over C- or Ku-band frequencies, and is scalable to small or large networks. A Web-based NMS makes it simple to operate and easy to configure.

LinkStar Broadband Applications:
  • Internet access
  • Digital media streaming
  • Videoconferencing
  • Distance education
  • File transfer
  • Multicasting
  • Virtual private networks

Broadband applications supported include:

  • High-speed Internet access
  • Broadband intranet/extranet access
  • Corporate training and eLearning
  • Real-time multimedia streaming to the desktop
  • Content distribution
  • Corporate-wide enterprise resource planning
  • Traditional enterprise uses such as software upgrades, email and client/server applications
  • IP multicast, unicast and broadcast applications

The DW4020 terminal is a self-hosted, stand-alone unit that provides an integrated broadband LAN solution to Windows, UNIX, Linux, MAC, and other platforms running IP over Ethernet. The DW4020 is completely self-contained, requiring no external PC to host any functions. It performs many of the functions of a typical IP router, thereby eliminating the need for a separate external router. Router functions performed by the unit include IP routing using RIPV1, RIPV2 or static IP addresses, DHCP Server (assignment of IP addresses on the local LAN), Network Address Translation (NAT), and Firewall using filters.

Key features include:

  • Ethernet-based
  • Operating System (OS) independent
  • Scalable
  • Self-hosted
  • Stand-alone terminal

The DW4020 terminal can achieve a receive throughput of 2.0 Mbps or more over the satellite per TCP session with an aggregate throughput of greater than 6.0 Mbps. In addition, by implementing the Hughes Performance Enhancement Proxy (PEP) feature, the number of TCP handshakes is reduced and the user data is compressed. This feature minimizes latency over the space link and accelerates the throughput performance so that data can be delivered quickly to the user.

The DW4020 terminal provides broadband access to multiple users connected to the same satellite terminal and supports two-way connectivity between the remote units and the World Wide Web. Adding new remote units is a simple task with this scalable solution. As a business grows, terminals can be quickly installed at new locations.

With DIRECWAY, corporate intranets can be extended to remote locations without raising concerns about security. The DIRECWAY network incorporates multiple security mechanisms, conditional access and encryption to ensure the privacy of all your information.

  Technical Specifications   
  Remote Equipment
   Supported Frequencies: Ku-band (14.0 - 14.5 GHz uplink, 10.95 - 12.75 GHz downlink)
  Outdoor Unit
   Ku-band: 0.5 or 1.0 watt
  Data Protocol Support
   TCP/IP, UDP/IP, IP multicast
  Satellite Specifications:
   Outbound Carrier Specifications
    Data Rates: 4.6 Mbps to 48 Mbps
    Modulation: QPSK
    Encoding: Concatenated Reed-Solomon and Viterbi FEC
    Code Rates: Reed-Solomon: 188/204
Viterbi: 7/8, 5/6, 3/4, 2/3 or 1/2
    Bit Error Rate 10 -10 or better
   Inbound Carrier Specifications
     Data Rates: 64, 128 or 256 Kbps
     Modulation: OQpsk
     Encoding: Viterbi Rate 1/2
     Bit Error Rate 10 -7 or better
    Operating System: Any OS which supports IP over Ethernet
    Browsers: Internet Explorer 4.0 or higher
Netscape Navigator 4.0 or higher
    Internet Application:

All common TCP/IP applications, UDP or RTP traffic

  Physical Interfaces:
    Four switched Ethernet LAN RJ45 ports (10BaseT/100BaseT)
    One asyncgronous port (RS-232) for installation, commissioning and VADB
  Power Supply:
    Universal Power Supply: 90 - 264 VAC; 47-63 Hz
  Operating Temperatures:
    Indoor equipment: + 5 C ~ +40 C
    Outdoor equipment: -30 C ~ +55 C
  Mechanical & Environmental:
    Weight: 1.8Kg (4.0 lbs)
    Dimension (IDU): 16.5cm W x 14.6cm H x 22.3cm D 
(6.5"W x 5.75"H x 8.8"D)
     SNMP Network Manageable Using the DIRECWAY vision NMS.

Click on the thumbnail to download DW4020
System Configuration
Data Sheet

(PDF, 102K)