Even experts need occasional help with telecom terms. We have combined glossaries from several sources to simplify finding the definitions you need.
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T-1 Circuit
A digital circuit that uses the DS-1
signaling format to transmit information over the telephone network at 1.544
megabits per second. Can carry up to 24 uncompressed voice channels.
Tandem
The connection of networks or circuits in series; that is, the connection of
the output of one circuit to the input of another. See Tandem
Switch.
Tandem Point
An intermediate location in a tandem architecture. The
tandem point passes a call to the next destination.
Tandem Switch
Tandem is a telephony term meaning "to connect in series." Thus,
a tandem switch connects one trunk to another. A tandem
switch is an intermediate switch or connection between an originating telephone
call or location and the final destination of the call.
Tandem Switching Provider (TSP)
Any Interexchange Carrier, end
user, or other access provider that provides tandem
switching functions for switched transport
services.
Tandem Switched Transport
Consists of circuits dedicated to the use of a single customer from the serving
wire center to the tandem
switch and circuits used in common by multiple customers from the tandem
switches to an end office.
Tandem Transit Service
Enables end users of a CLEC
to originate intraLATA calls destined for an
end user of a third local exchange
carrier.
Tariff
A statement by a communications company filed with the FCC
that sets forth services offered, and rates, terms, and conditions for those
services.
TCAP
See Transaction Capabilities
Application Port.
TCP/IP
See Transmission
Control Protocol/Internet Protocol.
TCSI
See Transaction Code Status Indicators.
Technically Feasible Points
Points at which it is technically or operationally feasible to interconnect
with the Verizon network without threatening the reliability or security of
the existing network.
Telcordia Technologies
Formerly known as Bellcore, this corporation conducts research and development
projects including development of new telecommunications services. Telcordia
also provides centralized technical and management services for the Regional
Holding Companies. In addition, Telcordia provides generic requirements
for the telecommunications industry for products, services, and technologies.
Telecommunications
As defined in the Telecommunications
Act of 1996, transmission between or among points specified by the user,
of information of the user's choosing, without change in the form or content
of the information as sent and received. Any transmission, emission, or reception
of signs, signals, writings, images, and sounds or intelligence by wire, radio,
optical, or other electromagnetic systems.
Telecommunications Act of 1996
Public Law 104-104, enacted February 8, 1996, provided comprehensive reform
of the 1934 Communications Act. The Act was designed to foster competition among
local telephone, long distance telephone, cable and other communications companies.
Telephone Number Assignment Inquiry
A Verizon Wholesale local pre-order transaction that allows the CLEC to reserve an end user telephone number(s).
Telecommunications Resellers Association (TRA)
An organization representing the interests of more than 200 companies involved
in the resale of telecommunications services.
Telecommunications Service
As defined in the Telecommunications
Act of 1996, the offering of telecommunications for a fee directly to the
public, or to such classes of users as to be effectively available directly
to the public, regardless of the facilities used
to transmit the telecommunications services.
Three-Tone Slope
The loss at 404 Hz and 2804 Hz relative to the loss at 1004 Hz.
Throughput
A measure of the overall efficiency, quality and performance of a communications
link and its software/protocols.
Time Call Hour Indicator
The hour at which the call was placed.
Time Call Minute Indicator
The minute within the hour at which the call was placed.
Token Ring
A local area network architecture that connects stations by using a token (special
data packet) passing access method to allow a token to be passed from node to
node on the ring.
Toll Call
Call made within a Regional Calling
Area to exchanges outside the local calling area. Toll calls are individually
detailed on a bill.
TOS
See Type of Service.
TR008 Line Port
A Verizon Wholesale UNE service that provides integrated access to Verizon's digital switch, allowing analog-switched services to be provisioned according to Telcordia TR008 standards.
TRA
See Telecommunications
Resellers Association.
Traffic
Transaction Capabilities Application Port (TCAP)
Functions that control non-circuit related information switched between two
or more signaling nodes.
Transaction Capability Application Port (TCAP) Services Forecast
A list of intended TCAP services that identifies serving node and the Verizon
Local Access and Transport
Area (LATA) for each of the next three years.
Transaction Code Status Indicators (TCSI)
The "intelligence" codes that are used by carrier customers and Local Service Providers to exchange Primary Interexchange Carrier (PIC) and end user information via the industry standard Customer Account Record Exchange (CARE).
Transmission Control Protocol/Internet Protocol (TCP/IP)
A widely used network protocol that supports communication across interconnected
networks; and between computers with diverse hardware architectures and various
operating systems.
Transmission Level Point (TLP)
A point in a transmission system at which the ratio, usually expressed in decibels,
of the power of a test signal at that point to the power of the test signal
at a reference point is specified.
Transmission Repeater
Loop enhancement equipment that amplifies and equalizes voice grade signals.
Trigger Mechanism
The elements within a service provider's
network that allows switches to determine that a particular call might be routed
to a ported number, and to attempt to obtain additional routing information.
Trouble Administration
The process of reporting and tracking problems (troubles) on telephone numbers or circuits.
Trouble Ticket
A record used for reporting and managing the resolution of network or circuit
outages.
Trouble Ticket Modify (TTMOD)
The transaction a CLEC
or Reseller uses to add, change or delete a previously
created Verizon trouble ticket (for example, for rescheduling repair activities).
A CLEC or Reseller may submit a modification for any open trouble ticket, but
not for a closed trouble ticket.
Trunk
A communications path connecting two switching systems in a network, used to
establish an end-to-end connection.
Trunk Group
A set of trunks that are traffic engineered as a unit in order to establish
connections between switching systems in which all of the communications paths
are interchangeable.
Trunk-Side
A central office switch connection that
has been programmed to treat the circuit as connecting to another switching
entity (for example, another carrier's network). Trunk-side connections offer
transmission and signaling features that are appropriate for connecting switching
entities.
Twisted Pair (TP)
Cable consisting of two 18 to 24 AWG (American Wire Gauge) solid copper strands
twisted around each other. The twisting provides a measure of protection from
electromagnetic and radio-frequency interference.
Two Binary, One Quaternary (2B1Q)
A line code used for BRI and Centrex
BRI where each two bits of the binary data stream are combined into a single
four-level pulse amplitude modulation signal.
Two-Way Wireless Mobile Telecommunications Service Provider
A CMRS Provider
of telephone exchange and exchange access services. There are the following
types:
Two-Wire Links
A two-wire link (or loop) is available for the transmission of analog or digital
signals between Verizon's central office and the network interface device at
the end user's premises.
Type of Service
A four-character field on a Local Service Request that identifies the End User's account type as business, residential or government; also identifies the product, class and characterization of the product being ordered.
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