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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T

T1: A mode of frequency division multiplexing that provides 1.544 Mbps or 24 voice channels.

TA: See Terminal Adapter.

Take Rate: Take rate represents the number of subscribers divided by the number of addresses available. Because the number of addresses available depends on the definition of availability, there are several different measures of take rate.

TDM: See Time Division Multiplexing.

TDMA: See Time Division Multiple Access.

Telco: Telephone company - a provider of telecommunications services such as voice (telephony) and data services. Also called common carriers or LECs (Local Exchange Carriers); ILECs are incumbent providers, like CenturyLink, or Verizon.

Telepresence: This term refers to a variety of attempts to use modern technology to make it seem like a person in a remote location is in the room. The more bandwidth available, the more realistic the remote person will appear. Modern telepresence applications are impressive, using sophisticated algorithms with multiple video cameras and microphones to go far beyond video-telephone systems.

Terminal Adapter (TA): The CPE device used to convert VOIP signals to traditional telephone signals so customers do not require specialized telephones.

Tetra Tech Construction Services (TTCSI): Tetra Tech Construction Services is a Tetra Tech company. TTCSI has the expertise and resources to deploy overbuild networks on time and on budget.

Time Division Multiple Access (TDMA): Technology used in digital cellular telephone communication that divides each cellular channel into three time slots in order to increase the amount of data that can be carried. TDMA is used by Digital-American Mobile Phone Service (D-AMPS), Global System for Mobile communications (GSM), and Personal Digital Cellular (PDC). Each of these systems implements TDMA in somewhat different and potentially incompatible ways. An alternative multiplexing scheme to FDMA with TDMA is CDMA (code division multiple access), which takes the entire allocated frequency range for a given service and multiplexes information for all users across the spectrum range at the same time.

Time Division Multiplexing (TDM):

TLS: See Transparent Local Area Network Services.

Transparent Local Area Network Services (TLS): A type of VLAN service available on open access networks.

Triple Play: The three main services offered over modern broadband networks - television, phone services, and Internet access - comprise the triple play. Many consumers like to get all three from the same service provider on the same bill. Service providers frequently offer deals that will lower the cost on these packages. Typically, television breaks even or loses money whereas the service provider makes the most profits from phone and Internet access.

TTCSI: See Tetra Tech Construction Services.


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