Hackers Underworld 2: Forbidden Knowledge/Hackers Underworld 2: Forbidden Knowledge.iso/PHREAK/MISP82.TXT

Text File | 1994-07-17 | 14KB | 1,008 lines

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                                  [phone]







                                Proudly Presents







                      The MCI Telecommunications Glossary







                            Part I Volume IV (T - W)







                      Typed and edited by Knight Lightning











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                                     - T -











T-CARRIER                              A time-division, pulse modulation, voice



                                       carrier used on exchange cable to



                                       provide short-haul trunks.







TAIL END HOP OFF (TEHO)                In a private network, a call which is



                                       carried over a flat rate facilities



                                       (Intermachine Trunks or IMT) to the



                                       closest switch node to the destination



                                       of the call, and then connected into the



                                       public network as a local call.







TANDEM                                 A switching arrangement in which the



                                       trunk from the calling office is



                                       connected to a trunk to the called



                                       office through an intermediate point.







TANDEM SWITCHING SYSTEM                Synonym: Tandem Tie Trunk Network.











TANDEM TIE TRUNK NETWORK (TTTN)        A serving arrangement which permits



                                       sequential connection of tie trunks



                                       between PBX/CENTREX locations by



                                       utilizing tandem operation.







TANDEM TRUNKING                        Trunks which connects two or more



                                       switches together.







TARIFF                                 The published rates, regulations, and



                                       descriptions governing the provisions of



                                       communications service.







TELCO                                  Local telephone company.







TELECOMMUNICATIONS                     The transmission of voice and/or data



                                       through a medium by means of electrical



                                       impulses and includes all aspects of



                                       transmitting information.







TELEGRAPH                              A system employing the interruption of,



                                       or change in, the polarity of DC current



                                       signaling to convey coded information.







TELEPHONE                              A device which converts acoustical



                                       (sound) energy into electrical energy



                                       for transmission to a distant point.







TELETYPEWRITER                         A machine used to transmit and/or



                                       receive communications on printed page



                                       and/or tape.







TERMINAL                               (1) The device used at a subscriber's



                                       location for purposes of communicating,



                                       such as the telephone instrument,



                                       teleprinter, computer terminal, etc.,



                                       (2) The "end point" or extremity" such



                                       as Terminal Pole of an open wire line,



                                       or Terminal Office representing the



                                       final central office in a switching



                                       network where the subscriber's call



                                       originates or terminates.







TERMINAL EQUIPMENT                     Devices, apparatus, and their associated



                                       interfaces used to forward information



                                       to a local customer or a distant



                                       terminal.







TERMINATION                            (1) An item that is connected to the



                                       terminal of a circuit or equipment.



                                       (2) An impendance connected to the end



                                       of a circuit being tested.







TIE-LINE                               A private line connecting two PBXs.







TIME DIVISION MULTIPLEXING (TDM)       Equipment which enables the transmitting



                                       of a number of signals over a single



                                       path by  transmitting them sequentially



                                       at different instants of time.







TOLL CALL                              Any call to a point outside the local



                                       service area.







TOLL CENTER                            (1) A central office where  operators



                                       (human or mechanical) are present to



                                       assist in completing incoming toll



                                       calls. (2) A center for the switching of



                                       toll calls.







TOLL PLANT                             The facilities that connect toll offices



                                       throughout the country.







TOLL RESTRICTION                       A restriction in outgoing trunks which



                                       counts the first three digits dialed and



                                       diverts calls to forbidden codes either



                                       to a busy tone, to the operator, or to a



                                       recorded announcement.







TOUCH-TONE ADAPTOR                     A device that can be connected to a



                                       rotary dial telephone to allow for DTMF



                                       signaling.







TRAFFIC                                Calls being sent and received over a



                                       communications network.







TRAFFIC MEASUREMENT AND RECORDING      A computer generated report showing usage



SYSTEMS (TMRS)                         usage information of telephone systems.



                                       Usually this includes trunk utilization,



                                       outages, queueing time, and the need for



                                       additional common equipment.







TRAFFIC SERVICE POSITION SYSTEM        A toll switchboard position configured



(TSPS)                                 as a push button console.







TRANSMISSION                           The electrical transfer of a signal,



                                       mesage or other forms of data from one



                                       location to another without unacceptable



                                       loss of information content due to



                                       attenuation, distortion, or noise.







TRANSMISSION LEVEL                     The level of power of a signal normally



                                       1,000 Hz, which should be measured at a