Telecommunications
Glossary
- T1/DS-1
- (Facility)
The equivalent of 24 multiplexed voice grade channels. 1.544 million
bits per second (1.5Mbps)
T2/DS-2
- (Facility)
The equivalent of 4 multiplexed T1 channels. 6.312 million bits per
second (6.3Mbps)
T3/DS-3
- (Facility)
The equivalent of 28 multiplexed T1 channels. 44.736 million bits per
second (45Mbps)
T4/DS-4
- (Facility)
The equivalent of 6 multiplexed T3 channels. 274.176 million bits per
second (274Mbps)
Tariff
- A public
document filed with the FCC or a PUC that outlines services and rates.
Usually, all customers are offered the same rate for a specific service,
based on published constraints.
- TDD
- Telecommunications Device for the Deaf
- Telco
- Telephone Company
- The local
or regional telephone company that owns and operates lines to customer
locations and Class 5 Central Office Switches. Telcos have connections
to other COs, Tandem (Class 4 Toll) offices and may connect directly
to IECs like WorldCom, AT&T, MCI, Sprint, LDDS, etc.
Third Party Billing
- Use of
an outside service bureau for bill processing such as: call rating,
customer invoicing, collections, etc.
- Time
of Day Routing
- Route
calls based on the time the call originates. (e.g. direct morning calls
to East Coast operators and afternoon calls to West Coast operators,
etc.). SMS/800 supports 15 minute time intervals.
Toll
- A rated
call (Contrast CDR - unrated call detail record). Tolls appear on the
Invoice Detail.
Toll Call
- A call
with incremental use (minute-by-minute) charges. (Often through a Class
4 Toll Office).
Toll Fraud
- A crime
in which a "hacker" obtains telecommunication services by:
breaching computer security, using or selling stolen long-distance credit-card
codes, or, accessing a PBX and using its communication facilities illegally.
Toll Fraud is estimated to cost U.S. companies $1.2 billion/year.
Two Out Of Three Rule
- When determining
state tax jurisdiction, there are three locations to consider: originating
station, destination station, and the location that the bill is sent
to. If two out of three are the same, then that state receives the tax.
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Telecommunications glossary
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Telecommunications Glossary "T"
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