Glossary of Terms

 

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The telecommunications and fiber industries are full of terms and acronyms. Our glossary of terms attempts to capture some of them.

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G

Gabriel Network Topology: An approach to modeling efficient (shortest-route) connections between known network nodes, where the links are determined by making a pairwise comparison of points in the context of the points around them. In a classic Gabriel network, the set of points should not include any co-incident points, that is two points that lie exactly at the same location.

Gbps: See Gigabit per Second.

Geographic Information System (GIS): Geographic information systems are databases of spatial data. GIS systems are used to map traffic flows, contagion patterns, flood plains, and many other geography dependent features - like telecommunications outside plant.

Gig-E: See Gigabit Ethernet.

Gigabit Ethernet: A network transmission standard that provides a data rate of 1,000 megabits per second.

Gigabit Passive Optical Network (GPON): A type of PON standardized by the ITU-T, offering downstream capacities of up to 2.5 Gbps and upstream capacities of up to 1.25 Gbps, shared among a limited number of end users.

Gigabit per Second (Gbps or Gb/s): Gigabits per second - or one billion bits per second. 8 Gbps means that 8 billion bits are transferred each second. Using an 8 Gbps connection, it would take 1 second to transfer a 1 GB (Gigabyte) file. 1 Kbps (Kilobits)<1 Mbps (Megabits)<1 Gbps.

GIS: See Geographic Information Service.

Global System for Mobile Communication (GSM): A second-generation digital mobile cellular technology using a combination of frequency division multiple access (FDMA) and time division multiple access (TDMA). GSM operates in several frequency bands: 400MHz, 900MHz and 1800 MHz. On the TDMA side, there are eight timeslots or channels carrying calls, which operate on the same frequency. The standard was jointly developed between European administrations under Groupe Speciale Mobile in the 1980s and introduced commercially in 1991. Unlike other cellular systems, GSM provides a high degree of security by using subscriber identity module (SIM) cards and GSM encryption.

Gompertz Model: A mathematical model used to forecast technology adoption when substitution is driven by superior technology, but purchase depends on consumer choice.

GPON: See Gigabit Passive Optical Network.

Greenfield: A plot of land that will soon become a residential or business development. Building a broadband network is cheaper in greenfield developments because roads, sidewalks, lawns, and buildings are not yet impediments to running the necessary wires and the network can be deployed in conjunction with the other utilities.

GSM: See Global System for Mobile Communication.


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