(Facility) The equivalent of
24 multiplexed voice grade channels. 1.544 million bits per second (1.5Mbps)
(Facility) The equivalent of
4 multiplexed T1 channels. 6.312 million bits per second (6.3Mbps)
(Facility) The equivalent of
28 multiplexed T1 channels. 44.736 million bits per second (45 Mbps)
(Facility) The equivalent of
6 multiplexed T3 channels. 274.176 million bits per second (274 Mbps)
A major telco switching
center for the switched telephone network, which interconnects two or
more central offices that cannot directly be
connected; a major switching center linking several
end offices, especially in high-density areas. Toll Office - Class 4
Switch. Hierarchical interconnection
for Class 5 End
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.
Tax Exempt Certificate
that verifies tax exempt status. Usually filed with an RBOC. There is
a field on all
Access Service Requests to indicate
the filing status.
Tax Identification Number
identifier for business organizations that is used for reporting tax
payments to the
government (similar to the
social security number for individuals).
TCP/IP - Transmission Control Protocol / Internet Protocol
A data communication standard for
interconnection of dissimilar networks and computing systems.
Standardized system for network signal.
TE - Terminal Equipment
represents the endpoint of ATM connection(s) and termination of the various
protocols within the connections(s).
A person familiar with
installation and maintenance of hardware and/or software systems.
Live, two-way audio
transmission between two or more locations. Usually includes speaker
phones and microphone amplification systems
that allow audio volume balancing for people
different locations from the microphone. May also be supported by the use of
FAX machines, etc.
An application that provides virtual
terminal services for a wide variety of remote systems. It
allows a user at one site to interact with
applications at other sites as if the user's terminal
A pattern (e.g. a cookie cutter)
used to replicate objects, circuits, records, etc. (C++)
A facility for creating parameterized class
(type) definitions. (SMS/800) A standard
defined by an IXC that specifies the limits and boundaries (NPAs,
of 800 routing.
Theoretical Midpoint - TMP
halfway point that divides an international private line circuit into its
US and foreign halves. A US records
carrier is responsible for the US portion of service and
a foreign records carrier assumes responsibility for
service to the foreign half.
A product or service vendor
(other than the primary vendor or customer) that supplies a
necessary component of a system. (e.g.
software, circuit cards, etc.)
Third Party Billing
Use of an outside
service bureau for bill processing such as: call rating, customer invoicing,
The end result of data
transmission (for a given period of time). It is a measure of the overall
efficiency, quality and performance of a
communications link and its software protocols.
TIIAP - Telecommunications and Information Infrastructure Assistance
A grant program from the National
Telecommunications and Information Administration of
the United States Department of Commerce, established by Congress in
fiscal year 1994
to assist non-profit organizations
and units of state and local government to undertake projects
which contribute to the building of a national
information infrastructure. Submitted by Don Druker,
U.S Dept. of Commerce -- Nov. 4, 1994.
3 seconds in a communications
Two-way transmission circuits that
typically directly connect a PBX in one location to a PBX
in one location to a PBX in another. Tie lines
are normally arranged for two-way calling. Calls
an extension at one location can be placed to an extension at the
distant location by
dialing a short access number. In
most cases, this type of circuit is terminated with a four-wire
analog local loop on both ends and uses MF signaling
with E & M supervision. Tie lines can be
support voice and/or data.
Time Division Multiplexing - TDM
of mixing multiple signals on a single channel by transmitting in tightly
slots. Unlike packet switching,
TDM does not allow resource balancing during periods of mixed
high and low use of different signals.
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
The DACS/DCC/DCS equipment
manufactured by Tellabs, and deployed by the CLEC/ICP at several hubs and switch sites. Equipment has the
capacity of 1,024 DS-3's, or 28,672 DS-1s and 688,128
TL1 - Transaction Language 1
primary language used to encode an alarm message for certain kinds of
An IBM LAN-based LAN protocol
that uses a ring-shaped network topology. Token Ring has speeds of 4 Mbps and 16 Mbps. A distinguishing
packet is transferred from machine to machine and
only the machine that is in control of the token is able to transmit.
A rated call (Contrast CDR -
unrated call detail record). Tolls appear on the Invoice Detail.
A call with incremental use
(minute-by-minute) charges. (Often through a Class 4 Toll Office).
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
companies $1.2 billion/year.
Bellcore defined interface for the
SMS portion of the DMS-100 that receives the POTS
analog service from the customer site. Does not contain ISDN support
A lamp or light-emitting diode
(LED) provided as part of a standard DSX patch and cross-
connect circuit that aids in locating the two ends of
a cross-connect. Inserting a plug into
monitor jack at one end of a cross-connect causes the tracing lamps at both
Activity on a network or an
The process or the
organization responsible for monitoring historical network use statistics,
anticipating growth trends, planning, designing and
implementing network facilities.
Frame hardware that allows
jumpers to transition from the front of a DSX lineup to the rear.
The transition panel is needed where a newer DSX is
used in the same lineup adjacent to the
which has rear-running jumpers.
Classification based on:
(1) data flow (simplex, half duplex, full duplex), (2) Physical connection
(parallel, serial), and (c) timing
The foundation of
communication capacity between two points. It is governed by the equipment
type generating the (optical) signals. The
capacity of a single fiber can be increased by installing
higher-speed (higher-cost) transmission systems
A driver and a source used to
change electrical signals into optical signals.
The installed cable, switches and
equipment that carries a phone signal. The transport system could include
CLEC/ICP lines hooked to the LEC, which in
turn hooks to an IXC, which hooks to the receiving
LEC and to the callers final destination.
Travel (Card) Service
credit card with an Authorization Code for using a long distance carrier
customer is away from their home or
office (ANI). Travel Service calls are charged to the customer to
whom the AuthCode was issued.
An application-specific process
invoked by a database management system as a result of a request
to add, change, delete, or retrieve a data
A piece of paper or a record
in a computer system used to report and manage the resolution of
network or circuit outages.
A (high-capacity) connection between
switches. From a customer perspective, trunk may refer
to an external (carrier) line connected to
CPE/PBX, including local exchange lines, WATS lines
and dedicated private lines. Customer trunks may be outgoing only,
incoming only or two-way.
A group of circuits of a
common type that originate from the same location.
A single circuit in a
A telephone circuit
connected to a telephone company central office through a switch port that
has been programmed to treat the circuit as a trunk
circuit connecting to another central
These offer all of the network transmission and signaling features
appropriate for a
circuit interconnecting two central
Completing the installation of
a circuit and making it available to the customer that requested it.
A circuit comprised of two
copper wires that are twisted to cancel their own radio frequency
interference, and thus reduce noise that might
otherwise be induced into adjacent circuits.
Two Out Of Three Rule
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.
conversation between or among two (or more) parties, where each party has
the ability to both transmit and receive
communication from the other party (or parties).
Type 1 Service
Customers who are hooked
directly to the CLEC/ICP network, from their premises to the CLEC/ICP's central office (hub); or, otherwise known as On-Net.
Type 2 Service
Customers who are hooked to
the CLEC/ICP network through the LEC, or who are only billing customers of
the CLEC/ICP and may never be hooded in the CLEC/ICP network.
This is known as Off-Net.
Type 3 Service
Customers who are co-located
at the CLEC/ICP's end offices.
Type 4 Service
Customers who handle the
connections between their offices and the LEC, (the CLEC/ICP usually performs this task), and are hooked to the
CLEC/ICP network from the LEC
co-location. An IXC could also be this type of customer for the CLEC/ICP.