Hackers Underworld 2: Forbidden Knowledge/Hackers Underworld 2: Forbidden Knowledge.iso/PHREAK/MISP80.TXT

Text File | 1994-07-17 | 25KB | 1,795 lines

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                                  [phone]







                                Proudly Presents







                      The MCI Telecommunications Glossary







                            Part I Volume II (E - N)







                      Typed and Edited by Knight Lightning











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                                    - E -







ECHO                                  A signal that has been reflected or



                                      otherwise returned with sufficient



                                      magnitude and delay to be percieved by



                                      the speaker.







ECHO RETURN LOSS (ERL)                The loss which must be in the echo path



                                      to reduce echo to a tolerable amount.







ECHO SUPRESSOR                        A device which detects speech signals



                                      transmitted in either direction on a



                                      four-way circuit, and introduces loss



                                      in the direction of transmission.







EIGHT HUNDRED SERVICE (800)           A commonly used reference for inward WATS



                                      service (See WATS, Inward).







EITHER END HOP OFF (EEHO)             Uses either Head Hop Off or Tail End Hop



                                      Off.







ELECTRONIC DATA PROCESSING            The use of electronic memories to store,



                                      up-date, read, and use information.







ELECTRONIC KEY TELEPHONE SETS (EKTS)  A generic term indicating key telephones



                                      with special buttons which are



                                      electronically programmed to access



                                      various PBX features.







ELECTRONIC SWITCHING SYSTEM (ESS)     A Bell System term for electronic







ELECTRONICALLY PROGRAMMABLE READ      Memory which is initially programmed by



ONLY MEMORY (EPROM)                   the manufacturer.  Changes can be made to



                                      conform to the customer requirements



                                      at their premises.







ELECTRONIC TANDEM NETWORK (ETN)       1. A private network automatically and



                                      electronically connecting the calling



                                      office to the called office through



                                      Tandem-Tie-Trunks. The network switches



                                      also function as PBX's. 2. An AT&T



                                      product name. 3. Used as a generic term



                                      a PBX base network.







END OFFICE CONVERSATION               When an end office offers equal access.







ENHANCED PRIVATE SWITCHED             A private network utilizing Bell provided



COMMUNICATIONS SERVICE (EPSCS)        equipment located in the central office



                                      and dedicated to a specific customer.







E&M LEADS                             A pair of leads which carry signals



                                      between trunk equipment and seperate



                                      signaling equipment unit.  The M lead



                                      transmits battery or ground signals to



                                      the signaling equipment, and the E lead



                                      recieves open or ground signals from the



                                      signaling equipment.







E&M SIGNALING                         An arrangement whereby signaling between



                                      a trunk circuit and an associated



                                      signaling unit is effected over two



                                      leads providing full-time, 2-way,



                                      2-level supervision.







ENTERPRISE NUMBER                     A unique telephone exchange number that



                                      permits the called party to be



                                      automatically for the incoming calls.



                                      Synonym: "Toll Free Number;" INWARD WATS.







EQUALIZATION                          The procedure of compensating for



                                      fluctuation in circuit amplitude, delay,



                                      or distortion.







ERLANG                                A unit of traffic intensity. One Erlang



                                      is the intensity at which one traffic



                                      path would be countinuously occupied,



                                      e.g., one call per hour.







ERLANG B TABLE                        A method for determining grade of service



                                      for a specified amount of traffic.



ERROR RATE                            The probability of an error ocurring



                                      during the transmission of a message.







EXCHANGE                              A telephone switching center.







EXCHANGE AREA                         A geographical unit established within a



                                      telephone company's serving area for the



                                      adminastration of telephone service



                                      provided. One schedule of charges applies



                                      to the whole area. Usually served by one



                                      or more central offices and their



                                      associated outside plant.







EXCAHNGE NETWORK FACILITIES FOR       AT&T's pricing arrangement for local



INTERSTATE ACCESS (ENFIA)             loops offered to OCCs for connecting the



                                      OCC's network to the local telephone



                                      company's central office.







EXPECTED MEASURED LOSS (EML)          The calculated 1 kH  loss of the trunk



                                      shown on the circuit or design layout



                                      record.







EXTENDED AREA SERVICE (EAS)           A telco tariff giving customers the



                                      option whereby the subscriber can pay a



                                      higher flat rate in order to obtain



                                      geographic coverage without additional



                                      per-call charges (non-toll charges).











                                    - F -











FACILITY                              Synonym: Circuit.







FACSMILE                              The transmission of pictures, maps or



                                      other documents via communications



                                      circuits using a device which scans the



                                      original document, transforms the image



                                      into coded signals and repoduces the



                                      original document at a distant point.







FEDERAL COMMUNICATIONS COMMISON (FC)  The government agency established by the



                                      Communications Act of 1934 which



                                      regulates the interstate communications