This module will cover off three general methods of connecting an ethernet LAN to the Internet.

These descriptions can be used to help with decision making regarding equipment needs and purchases, depending upon the type of backbone connectivity being installed to connect the ethernet: T1, cable, fibre optic cable, or wireless.

Each method of connectivity requires slightly different equipment. Connectivity equipment is discussed here in more general terms as the industry is very fast moving, such that mentioning specific models or brands would outdate this material very quickly. However, once you have used the descriptions below to determine the appropriate method for connecting the LAN to the Internet, you will be in a better position to contact suppliers and order the most up-to-date equipment for your needs.

• A "V-35" connection is generally used for this type of connectivity.
  
  • To enable this, the hub or switch (depending upon the technology purchased for the network) in the wiring closet is connected to a router, which may be provided by the service provider. The router will generally have an ethernet port on it that the ethernet can plug directly into.
    
  • The router then connects to the "V-35" connection via a serial connection.
    
  • The "V-35" connection leaves the building and connects to the service provider, via a device called a CSU/DSU. This device hooks directly into the T-1 line of the service connector.
    

• An E-10 direct connection is generally used for this type of connectivity.
  
  • The ethernet switch/router plugs directly into the E-10 line provided by the service provider or installed by
    the community.
    

• Many wireless devices are also routers/switches, enabling the ethernet to plug directly into them.
  

Equipment suppliers are generally happy to make recommendations and to suggest specific technology depending upon your needs. Check out the suppliers page for links to their websites, and notes on their products and services.