The Great Island Network
Let's start with a definition of what the Great Island network. The Great Island network includes your house wiring, the Comcast fiber optic network, the Verizon fiber optic network (FIOS) and the Verizon copper (telephone) network*. They work together to provide a wide variety of services to your home.
* You could also include radio frequency (cell phone, broadcast TV, satellite TV and wireless networking) in the definition.
Optical Network
Both Comcast and Verizon offer Fiber-to-the-Home (FTTH) service to Great Island.
 The ComCast FTTH service uses a passive optical network (PON) developed by Alloptic, Inc. to deliver 1 gigabit per second of ethernet data to the home using the Internet Protocol (IP) for data transport. A single strand of fiber feeds as many as thirty-two homes in a neighborhood using an optical splitter (i.e. point-to-multipoint).
An Optical Network Unit (ONU) provides a 10/100BaseT ethernet connection for internet and IPTV (digital TV service).
An Optical Radio Frequency (RF) Receiver converts the fiber optic RF video overlay back to its original format to provide basic cable TV service.
An optional set-top-box is used to decode MPEG-2 digital video from the IP network (IPTV) into a format suitable for your HDTV or standard definition TV. The set-top-box also decodes MPEG-2 digital audio from the IP network into Dolby 5.1 surround sound for your audio system.
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Verizon's Copper Network
Verizon runs four (4) lines to each home as part of Verizon's copper wire network. Besides Verizon telephone service, Verizon's Digital Subscriber Line (DSL) service is also available at Great Island.
The Network Interface Device (NID) attached to the outside of your house provides a connection to the Verizon standard copper wire network. The NID passes the Verizon signal to the distribution panel in your basement.
A Verizon compatible DSL modem inside your distribution panel provides a 10Base-T ethernet connection for internet service. The DSL modem can share an existing phone line and is designed so that your normal telephone service will operate even if the modem is unplugged or otherwise disabled.
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House Wiring Network
Your house comes with a Leviton Structured Media System. Category 5e data cable and RG-6/U coaxial cable runs between the distribution panel in your basement and the wall outlets in your living space.
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