TUCoPS :: Truly Miscellaneous :: cdc_28.txt

Yellow Pages Vol.II by Franken Gibe

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         [ x x ]            cDc communications              [ x x ]
          \   /                 presents...                  \   /
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           (U)                                                (U)
                    Frankie's Yellow Pages ... Volume II
            Yet another file from the Cow's Information Series,
            the Yellow Pages are a testament to the fun-filled
            world created by those zany Bell technicians. Herein,
            the serious phreak will find a complete encyclopedia
            of Bell System terms, abbreviations, and acronyms...

      >> A CULT Publication by High Priest and Scribe, Franken Gibe <<
           -cDc- Cult of the Dead Cow Dissemination Council -cDc-


  Cable Fill           The percentage of pairs in a cable sheath actually
  ~~~~~~~~~~           assigned and used.

  Cable Vault          An area, generally on the lower level of the telco,
  ~~~~~~~~~~~          where cables enter the building.

  Call Forwarding
  One of those amazing custom calling services. When call forwarding is
  activated by a customer, all calls to that line are automatically routed
  to another line designated during activation. [C.F. is ESS's answer to
  the diverter]

  Call Store
  The equipment unit of an Electronic Switching System that provides temporary
  memory storage of information pertaining to call processing & maintenance.

  Call Waiting
  The custom calling service adored by millions that provides a tone burst
  to a customer on an established call when a second call has been directed
  to that line. The notification tone is heard only by the called customer,
  whereas the incoming caller hears regular ringing. The customer can place
  the existing call on hold, connect to the calling party, and then repeat
  the procedure to reestablish the original connection. This operation can
  be done ad nauseum. [See File on the Call Waiting Tap...available to some]

  CAMA                See Centralized Automatic Message Accounting
  ~~~~                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  CAMA-ONI            See CAMA- Operator Number Identification
  ~~~~~~~~            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Carried Load
  (1) The load you tote around on the Big Date, and try to control [eew!]

  (2) The average number of calls that are in progress. The unit, one call,
      is called...shucks, y'know this...an Erlang.

  Carrier System
  A system for transmitting one or more channels of information by processing
  and converting to a form suitable for the transmission medium used by the
  system [got that?]. Many information channels can be carried by one broad-
  band carrier system. Common types of carrier systems are frequency-division,
  in which each info. channel occupies an assigned portion of the frequency
  spectrum, and time-division, in which each info. channel uses the trans-
  mission medium for periodic assigned time intervals.

  Carterfone Decision
  The MONUMENTAL decision made by the FCC in 1968 to the effect that telco
  customers should be allowed to connect their own equipment (i.e.
  DATA MODEMS) to the public telenetwork provided that this interconnection
  not adversely affect the telco's operations or the utility of the tele-
  phone system to others. Prior to this wonderful decision, only telco
  provided equipment could be hooked up to the network. Let's take a
  few moments to thank the Modem Deity for Equal Access.

  CCH                 See Connections per Circuit Hour
  ~~~                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  CCIS                See [yawn] Common Channel Interoffice Signaling
  ~~~~                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  CCITT               See Intl. Telephone & Telegraph Consultative Committee
  ~~~~~               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  CCS                 See Hundred Call Seconds
  ~~~                 ~~~~~~~~~~~~~~~~~~~~~~~~

  CCSA                See Common-Control Switching Arrangement
  ~~~~                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  CDO                 See Community Dial Office
  ~~~                 ~~~~~~~~~~~~~~~~~~~~~~~~~

  Central Office (CO)
  (1) An Overrated Bulletin Board System.

  (2) A switching system that connects lines to lines and lines to trunks. The
      term is more often used to refer to the telco building itself in which
      a switching system is located and to include other equipment (such as
      transmission system terminals) that may be located in such a building.

  Central Office Code
  A 3-digit identification number under which up to 10k station codes are
  subgrouped. Exchange area boundaries are associated with the CO code which
  accordingly has billing significance. Note that SEVERAL CO codes may be
  served by a single CO. Also called NNX code...the prefix...the exchange.

  Central Office Work Order
  An order for work to be done in the operating company to make or change
  equipment assignments for switching system line or trunk access.

  Centralized Automatic Message Accounting (CAMA)
  (Phantom Phreak's Phavorite...) A process using centrally located
  equipment, including a switchboard or a traffic service position,
  associated with a tandem or toll switching office, for automatically
  recording billing data for customer-dialed extra-charge calls originating
  from several local central offices. A tape record is processed at an
  electronic data processing center.

  Centralized Automatic Message Accounting- Operator Number Identification
  (CAMA-ONI) Operator
  An operator located at a position that is connected temporarily on a
  customer-dialed station-to-station call. The operator secures the calling
  number from the customer and keys the number into the centralized
  automatic message accounting equipment.

  Centralized Intercept Bureau (CIB)
  That type of bureau that is part of an Automatic Intercept System and is
  associated with one or more automatic intercept centers. It provides
  facilities whereby operators situated at auxiliary service positions
  furnish assistance to calling customers whose calls have been intercepted
  and who require help beyond that furnished by the auto. intercept center.

  A service for customers with many stations that permits station-to-station
  dialing, one listed directory # for the customer, direct inward dialing
  to a particular station, and station identification on outgoing calls.
  The switching functions are performed in a central office.

  A transmission path between two points. The term channel may refer to a
  one-way path or, when paths in the two directions of transmission are
  always associated, to a 2-way path. It is usually the smallest subdivision
  of a transmission system by means of which a single type of communication
  service is provided, i.e., a voice channel, teletypewriter, or data channel.

  Channel Bank
  Channel terminal equipment used for combining (multiplexing) channels on a
  frequency-division or time-division basis. Voice channels are combined into
  12- or 24-channel groups.

  Channel Busy Tone
  An audible signal indicating that a call cannot be completed because of
  trunk or switching system blocking. The tone is applied 120 times per
  minute. Also called fast busy or (the ever-popular reorder) tone.

  CIB                 See Centralized Intercept Bureau
  ~~~                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  (1) A communication path between two or more points.

  (2) A network of circuit elements, such as resistors, inductors, capacitors,
      semiconductors, etc., that performs a specific function.

  (3) A closed path through which current can flow.

  (4) A term no 'philter' would ever dream of asking.

  Circuit Order
  The document used to transmit engineering design of a public telephone
  network trunk or special-service circuit to the department that
  implements the design. (Good Social Engineering term...)

  CLASS               See Custom Local Area Signaling Service
  ~~~~~               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Class 5 Office
  A local central office that serves as the network entry point for station
  loops and certain special-service lines. Also called an end office. Other
  offices, classes 1,2,3, and 4, are toll offices in the telenetwork.

  CO                  See Central Office
  ~~                  ~~~~~~~~~~~~~~~~~~

  (1) Any of a wide variety of schemes for representing info. such as a color
      color code for values resistors, Morse code for telegraphy, and a ZIP
      code for a mail address.

  (2) A system of rules for representing information by digital signals such
      as teletypewriter code. See ASCII (Vol. I).

  (3) A numbering system for telephone addresses. See Central Office Code,
      Station Code, and Number Plan Area.

  (4) A set of standard abbreviations for equipment and facility names. See
      Common Language Code.

  (5) A set of rules for representing the amplitude of a signal sample by
      digital signals. See Pulse Code Modulation.

  (6) The least impressive achievement or possession of the common phreak.
      See also Codezz, Kodezz, K0dezz, etc.

  Coded Ringing
  A form of semiselective ringing. The customer is required to identify his
  own code by the number of rings and/or their duration. A variation of
  coded ringing is one of the CLASS services.

  (1) Something the CULT is not very often.

  (2) Refers to a fixed phase relationship that provides certain advantages
      in signal detection.

  Coherent Modulation System
  (For the SERIOUS amongst you)...A modulation system that requires a carrier,
  either transmitted or locally derived and having the same frequency and
  phase as that associated with the received signal, for recovering the
  original modulating signal.

  Coherent Phase-Shift Keying (CPSK)
  Modulation techniques for transmitting digital info. in which that info.
  is conveyed by selecting discrete phase changes of the carrier relative
  to a reference. See Coherent Modulation System or a physicist near you.

  Coin-First Service
  Coin telephone service in which an initial rate deposit is required to
  obtain a dial tone. Coin-first service is being replaced by dial-tone-
  first, an improved service requiring additional functions in the station
  and in the switching system. (Thus the BIOC concept that areas with
  coin-first fortress phones are served by older switches.)

  Coin Relay
  A relay in a coin telephone that collects or returns the coins under the
  control of the central office. This relay is activated by CO tones,
  and in areas that do not use out-of-band signaling, Red Box tones can
  mean free calls by activating this relay.

  Common Channel Interoffice Signaling (CCIS)
  This is as precise a definition as I could find. I remember on Phreak Klass
  2600 (in 806), the arguments used to rage as to what CCIS is and how
  it negates or prevents boxing. Sigh. I'll go into all that here, since
  CCIS is one of the Top Five most-likely Philter Questions.

  CCIS is a signaling system, developed for use between stored program
  switching systems (i.e., ESS et alia), in which all of the signaling info.
  for a group of trunks (i.e., operator or 'blue box' MF tones, Green and
  Red tones) is transmitted over a dedicated high-speed data link, rather
  than on a per-trunk basis (i.e. inband signaling, whereby tones
  were actually 'shuttled' on your voice trunk). CCIS can reduce call setup
  time and save money (yeah!) compared with individual trunk signaling.

  That is the definition. Now, you may wonder what the difference
  is between out-of-band signaling and CCIS. Alright, though some will
  say that they're the same, that's not quite so. CCIS is out-of-band, but
  out-of-band is not always CCIS. Got that? That is to say, out-of-band
  is the generic label of signaling that occurs outside the voiceband.
  This method usually places signaling at frequencies beyond the voice
  frequencies, but not necessarily on a dedicated-trunk (CCIS). Thus,
  per-trunk signaling COULD be out-of-band. CCIS, on the other hand,
  devotes a separate trunk to signaling data. Thus, all such signaling
  is carried over a trunk separate from the voice trunk. This is out-of-
  band in a sense, then. The following is a letter I wrote to 2600 Mag. and
  their response. It's not too explicit, but it may help clarify a touch.

  Dear 2600:
       In the course of two years of telecom, I've read countless Gfiles
  which describe the (virtual) spectrum of 'boxes'. Yet few files give
  a clear explanation as to why boxing is impossible in many electronic
  switching offices. Would you mind explaining CCIS, and just how this
  'prevents' boxing? Thanks.

  Reply: "Put quite simply, it's impossible to blue box in an electronic
  switching office under CCIS because the equivalent of the blue box tones
  that a phreak would send are transmitted over a completely different line.
  Since you don't have access to these lines, blue boxing no longer works.
  This is ALSO called out-of-band signaling."

  Common Control
  An automatic arrangement in which items of control equipment in a switching
  system are shared; they are associated with a given call only during the
  periods required to accomplish the control functions. All Bell System
  Crossbar and ESS systems have common control. This is in contrast to the
  individual relays of Strowger switching.

  Common-Control Switching Arrangement (CCSA)
  An arrangement in which switching for a private network is provided by one
  or more common-control switching systems. The switching systems may be
  shared by several private networks and also may be shared with the public
  telephone network.

  Common Language Code
  Codes used to ensure uniform abbreviation of equipment and facility names,
  places, place names, etc. (Be nice to get ahold of a summary...anyone?)

  Communications Satellite Corporation (COMSAT)
  Created by authorization of Congress in the Communications Satellite Act
  of 1962. This private corporation (NOT any agency of the U.S. Government,
  though subject to governmental regulation) was created primarily to
  provide for the establishment, operation, and management of a commercial
  communications satellite system. COMSAT presently acts as manager for
  INTELSAT and also represents the U.S. in INTELSAT.

  Community Dial Office (CDO)
  A small automatic switching system that serves a separate exchange area
  having its own numbering plan and ordinarily having no operating or
  maintenance force located in its own building; operation is handled and
  maintenance is directed from a conveniently located and beautifully
  landscaped point referred to as an operator office.

  An abbreviation for compressor-expandor. A device used to compress the
  range of talker volumes at the input to a carrier system (in particular,
  to increase low-level talker volumes) and to expand the received volumes
  at the output of the carrier system (to provide complementary function
  and to make the transmission system transparent). This technique improves
  the signal-to-noise ratio for low-level talkers and provides a
  substancially reduced received noise level during the so-called quiet
  intervals. A miracle, really.

  Compandor Mistracking
  If this shows up on a philter, leave me mail. Mistracking refers to the
  failure of the expandor-characteristic of a compandor to complement
  exactly the compressor-characteristics, thereby causing signal distortion.

  COMSAT              See Communications Satellite Corporation
  ~~~~~~              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  (1) Applies to a switching network (or portion thereof) that has more
      inputs than outputs.

  (2) In a traffic network, combining calls arriving on many lines or trunks
      to transmit them more efficiently in a trunk group.

  (3) Locating as much equipment as possible at a given place to achieve
      economies in such things as building costs, maintenance, etc.

  (4) Something VERY difficult to maintain when reading tech. manuals.

  Connecting Arrangement
  The implementation for connecting arrangement service. A connecting
  arrangement consists of an interconnecting unit, a Technical Reference,
  and a tariff offering.

  Connecting Arrangement Service
  A service providing electrical connection to the public telenetwork of
  customer-provided equipment. This service, whish is usually denoted by a
  uniform service order code (USOC), is offered by tariff and is implemented
  with an interconnecting unit and a Technical Reference. (Great SE term!)

  (1) A point where a junction of two or more conductors is made.

  (2) Generally, a telfo connection is a 2-way voiceband circuit completed
      between two points by means of one or more switching systems. It
      contains two loops and may contain one or more trunks.

  Connections per Circuit Hour (CCH)
  An indication of holding time of calls. Under normal circumstances, ACH=
  CCH which is about equal to 6 in busy hour for trunk groups excluding
  high-usage groups.

  In Step-by-Step switching systems, a 2-motion electromechanical switch that
  operates on the last two digits of the telephone number to connect from a
  selector to any one of 100 customer loops. The connector performs the
  following functions:
  o Tests for busy
  o If busy, returns busy tone
  o If idle, rings the called party and returns ringback tone to calling line
  o Provides a supervisory signal indicating that answer has occurred and
    trips ringing
  o Provides talking battery to the calling line on intraoffice calls and
    to the called line
  o Disconnects when the customer hangs up

  Construction Program
  A detailed plan of placement, removal, and rearrangement of facilities to
  modernize and expand the capacity of the facilities network.

  Conversion (Converting)
  In signaling, the substitution of one, two, or three digits for received
  digits for the purpose of directing the call through the next office.

  Coordinate Network
  A switching network consisting of incoming and outgoing talking paths
  arranged at right angles to each other with fine-motion or electronic
  switching elements at intersections.

  CORNET Network
  A private telephone network serving Western Electric and Bell Laboratories;
  CORNET is a contraction of corporate network. This network uses common-
  control switching arrangements (CCSA).

  Country Code
  The 1-, 2-, or 3-digit number that, in the world numbering plan, identifies
  each country or integrated numbering plan in the world. The initial digit
  is always the world-zone number. Any subsequent digits in the code further
  define the designated geographic area (normally identifying a specific
  country). On an international call, the country code is dialed before
  the national number.

  An alternate name for an interconnecting unit.

  CPSK                See Coherent Phase-Shift Keying
  ~~~~                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Crossbar Switch
  The basic element of any Crossbar System. A crossbar switch is a relay
  mechanism consisting of 10 horizontal paths and 10 or 20 vertical paths.
  Any horizontal path can be connected to any vertical path by means
  of magnets. A 2-stage operation is used to close any crosspoint. First, a
  selecting magnet shifts all selecting fingers in a horizontal row, then a
  holding magnet shifts a vertical actuating card to close the selected

  Crosspoint Array
  An arrangement of switching elements used in some switching networks,
  characterized by incoming and outgoing talking paths arranged at right
  angles to each other, with switching elements at intersections.

  Undesired power coupled into a communications circuit from other communi-
  cations circuits. Telephone crosstalk may be either intelligible (& thus
  VERY amusing) or unintelligible (& thus VERY annoying).

  CTRAP               See Customer Trouble Report Analysis Plan
  ~~~~~               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Custom Calling Services
  A group of four keen services provided by ESS to business and residence
  customers: 3-way calling, speed calling, call waiting, and call forwarding.

  Custom Local Area Signaling Service (CLASS)
  The ultimate calling service. CLASS is one of the Bell Network's futuristic
  services meant to prop-up profits and presumably make the customers' lives
  a little better. This service includes such features as call-blocking
  and filtering, coded/priority ringing, and customer-accessible ANI on
  incoming callings. CLASS is but one facet of the ultimate telco network,
  ISDN (Integrated Services Digital Network).

  Customer-Premises Equipment
  Equipment normally installed on the customer's premises, such as telephone
  sets, key telephones, PBX's, etc.

  Customer Trouble Report Analysis Plan (CTRAP)
  A plan that provides manual and mechanized procedures for recording troubles
  reported by customers and analyzing the reports to obtain statistical data
  regarding customer service.

That's about it for Volume II. The C's are indeed myriad and multitudinous.
After you've digested yet another chunck of Telco Tech Info., look for Volume
III of the Yellow Pages, coming soon to BBS's everywhere...sorta.
 (c)1987 cDc communications  by Franken Gibe                         12/0/87-28
 All Rights Worth Not Very Much At All

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