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Basic Description of Wireless ISP System

Basic Description of Wireless ISP System. MikroTik Wireless Internet Service Provider Systems. What is WISP ?. It is fixed wireless service between the central node and the client direct line of sight required low power radios and high gain antennas are used It IS NOT a mobile service.

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Basic Description of Wireless ISP System

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  1. Basic Description of Wireless ISP System MikroTik Wireless Internet Service Provider Systems

  2. What is WISP ? • It is fixed wireless service between the central node and the client • direct line of sight required • low power radios and high gain antennas are used • It IS NOT a mobile service. MikroTik WISP

  3. RF Information • Broadband Technology • Spread Spectrum Technology • Direct Sequence Spread Spectrum (DSSS) • Frequency Hopping Spread Spectrum (FHSS) • Frequencies for Unlicensed SS • 2400-2483MHz ISM band, or • 5725-5875MHz ISM band MikroTik WISP

  4. DS versus FH • Direct Sequence • (+) Faster (up to 11 Mbps) and Greater Range • (+) recently standardization has made this the lowest cost radio • Frequency Hopping • (-) higher cost per radio • (-) Slower (max 3 Mbps) and Limited Range MikroTik WISP

  5. 2.4GHz Spread Spectrum • Channels • 1 to 13 depending on the set • three non-overlapping ones • Interference MikroTik WISP

  6. Antenna Types • Directional • Parabolic • Yagi or Loop Yagi • Sectorial • Horns • Omnidirectional MikroTik WISP

  7. Antenna Polarity • Omnidirectional and Sectorial Antennas • Vertical E-Plane • Directional Antennas • Vertical or Horizontal E-Plane depending on the mounting of antenna • For communicating radios the antennas should match the polarity MikroTik WISP

  8. Mounting of Antennas • Polarity • Vertical and Horizontal Alignment • Safety • Lightning Strikes MikroTik WISP

  9. Cabling Requirements • High Quality Cables • Low Loss - LMR-400 / Belden 99xx • Super Low Loss - LMR-600 • Cable Length - as short as possible • Recommended 3-5m for omni antennas • ~10m for directional antennas, depending on the distances, antenna gains, and radio power MikroTik WISP

  10. Cable Connectors • Standard • N Connectors (male or female) for antennas • Proprietary • RP-TNC Connectors for Aironet Radio MikroTik WISP

  11. Using Antenna Calculator • Distances to be covered • Cabling Length • Antenna Gains • Radio • Power • Receive Sensitivity MikroTik WISP

  12. WISP Topologies • Point to point links • (+) longer distances (max 30-40km) • (-) higher cost/client • Point to multipoint links • (+) serving multiple clients at lower cost/client • (+) larger area of coverage • (-) lower range (max 5-12km) MikroTik WISP

  13. What can be connected? • Internet Connectivity • Client’s LAN to the ISP • Client LAN uses a Wireless Gateway Router which connects to the Base Station of the ISP • Client's Computer to the ISP • Client’s Computer with a Wireless NIC connects to the Base Station of the ISP MikroTik WISP

  14. What can be connected? • Intranet Connectivity • Client’s LAN1 to Client’s LAN2 • Client’s LAN at a remote location uses a Wireless Router which connects to the Wireless Router at the main office • Client's Computer to the Client’s LAN • Client’s Computer at a remote location connects to the Wireless Router at the main office MikroTik WISP

  15. Wireless Setup Diagrams • Used conventions MikroTik WISP

  16. Base Setup MikroTik WISP

  17. Repeater Setup MikroTik WISP

  18. Advanced Repeater Setup MikroTik WISP

  19. Base Setup with Backbone MikroTik WISP

  20. Point-to-Point Setup MikroTik WISP

  21. IP Questionnaire • Type of cable used • 10 Base 2, 10 Base T, 10/100 Mbps? • If fiber optic - get a transceiver to 10BaseT… • What IP addresses are used • what network, network mask? Get one address for the router as the gateway for the LAN. • No addresses used yet. • Assign a private network, e.g., 192.168…. • Use addresses given by the ISP MikroTik WISP

  22. RF Network Configuration • System Identificator • Should be unique • Channel / Frequency • Should have minimal interference with other systems • Data Rates MikroTik WISP

  23. Base Unit Configuration • Connect the Antenna • Connect the Ethernet Cable • Connect the RS-232 Console Cable • Use Terminal Emulation Program on your Laptop or Desktop PC • Connect the Power Supply • Power the unit on MikroTik WISP

  24. Basic Configuration • Configure RF Parameters • System Identifier • Frequency • Data Rates • Configure the Identification Parameters • Name • IP Address / Mask / Default Gateway MikroTik WISP

  25. Things to Remember • Association Restriction • Maintain a list of controlled nodes • Turn Autoregistration off • Passwords for the Unit • Write - View and Change the Configuration, perform Diagnostics • Read - View Configuration MikroTik WISP

  26. IP Network Configuration • Global Addresses • use routing configuration • Local Addresses, no server • use masquerading • Local Addresses, local server • use masquerading and NAT MikroTik WISP

  27. System Diagnostics • Check the RF Communication • Registration/Association • Signal Strength and Quality • Link Speed • Check the IP Configuration • Network Address/Mask • Routing, Default Gateway • Ping, Traceroute MikroTik WISP

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