220 lines
10 KiB
Plaintext
220 lines
10 KiB
Plaintext
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>>===========================================================<<
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>> ANOTHER TELECOMMUNICATIONS PHILE FROM THE ARCHIVES OF THE <<
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>> PRIVATE SECTOR BBS (201) 366-4431, OFFICIAL BOARD OF 2600 <<
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>> FOR BEST RESULTS WHEN READING TRY 80 COLUMNS / LOWER CASE <<
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>>===========================================================<<
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.............................................................................
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.............................................................................
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. - The Bell Glossary - ..
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. by ..
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. /\<\ /\<\ ..
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. </\>\>ad </\>\>arvin ..
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.............................................................................
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.............................................................................
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ACD: Automatic Call Distributor - A system that automatically distributes
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calls to operator pools (providing services such as intercept and directory
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assistance), to airline ticket agents, etc.
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Administration - The tasks of record-keeping, monitoring, rearranging,
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prediction need for growth, etc.
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AIS: Automatic Intercept System - A system employing an audio-response
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unit under control of a processor to automatically provide pertinent info
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to callers routed to intercept.
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Alert: To indicate the existence of an incoming call, (ringing).
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AMA: Automatic Number Identification - Often pronounced "Annie," a facility
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for automaticaly identify the number of the calling party for charging
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purposes.
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Appearance: A connection upon a network terminal, as in "the line has two
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network apperances."
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Attend: The operation of monitoring a line or an incoming trunk for off-hook
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or seizure, respectivly.
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Audible: The subdued "image" of ringing transmitted to the calling party
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during ringing; not derived from the acual ringing signal in later systems.
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Backbone Route: The route made up of final-group trunks between end offices
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in different regonal center areas.
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BHC: Busy Hour Calls - The number of calls placed in the busy hour.
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Blocking: The ratio of unsuccessful to total attempts to use a facility;
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expresses as a probability when computed a priori.
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Blocking Network: A network that, under certian conditions, may be unable to
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form a transmisson path from one end of the network to the other. In general,
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all networks used within the Bell Systems are of the blocking type.
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Blue Box: Equipment used fraudulently to synthesize signals, gaining access to
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the toll network for the placment of calls without charge.
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BORSCHT Circuit: A name for the line circuit in the central office. It
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functions as a mnemonic for the functions that must be performed by the
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circuit: Battery, Overvoltage, Ringing, Supervision, Coding, Hybrid, and
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Testing.
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Busy Signal: (Called-line-busy) An audible signal which, in the Bell System,
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comprises 480hz and 620hz interupted at 60IPM.
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Bylink: A special high-speed means used in crossbar equepment for routing
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calls incoming from a step-by-step office. Trunks from such offices are often
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referred to as "bylink" trunks even when incoming to noncrossbar offices; they
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are more properly referred to as "dc incoming trunks." Such hish-speed means
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are necessary to assure that the first incoming pulse is not lost.
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Cable Vault: The point which phone cable enters the Central Office building.
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CAMA: Centralized Automatic Message Accounting - Pronounced like Alabama.
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CCIS: Common Channel Interoffice Signaling - Signaling information for
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trunk connections over a seperate, nonspeech data link rather that over the
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trunks themselves.
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CCITT: International Telegraph and Telephone Consultative Committe- An
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International committe that formulates plans and sets standares for
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intercountry communication means.
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CDO: COMMUNITY dial Office - A small usualy rural office typically served by
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step-by-step equipment.
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CO: Central Office - Comprises a switching network and its control
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and support equepment. Occasionally improperly used to mean "office code."
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Centrex: A service comparable in features to PBX service but implemented
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with some (Centrex CU) or all (Centrex CO) of the control in the central
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office. In the later case, each station's loop connects to the central office.
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Customer Loop: The wire pair connecting a customer's station to the central
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office.
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DDD: Direct Distance Dialing - Dialing without operator assistance over the
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nationwide intertoll network.
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Direct Trunk Group: A trunk group that is a direct connection between a given
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originating and a givin terminating office.
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EOTT: End Office Toll Trunking - Trunking between end offices in different
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toll center areas.
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ESB: Emergency Service Bureau - A centralized agency to which 911
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"universal" emergency calls are routed.
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ESS: Electronic Switching System - A generic term used to identify as a class,
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stored-program switching systems such as the Bell System's No.1 No.2, No.3,
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No.4, or No.5.
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ETS: Electronic Translation Systems - An electronic repacement for the card
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translator in 4A Crossbar systems. Makes use of the SPC 1A Processor.
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False Start: An aborted dialing attempt.
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Fast Busy: (often called reorder) - An audible busy signal interupted at twice
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the rate of the normal busy signal; sent to the originating station to
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indicate that the call blocked due to busy equipment.
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Fianl Trunk Group: The trunk group to which calles are routed when available
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high-usage trunks overflow; these groups generaly "home" on an office next
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highest in the hierarchy.
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Full Group: A trunk group that does not permit rerouting off-contingent
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foreign traffic; there are seven such offices.
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Glare: The sutuation that occurs when a two-way trunk is seized more or less
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simultaneously at both ends.
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High-Usage Trunk Group: The appellation for a trunk group that has alternate
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routes via other similar groups, and ultimatly via a final trunk group to a
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higher ranking office.
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Intercept: The agency (usually an operator) to which calls are routed when
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made to a line recently removed from a service, or in some other category
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requiring explanation. Automated versions (ASI) with automatic voice
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responce units are growing in use.
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Interupt: The interuption on a phone line to disconect and connect with
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another station, such as an Emergence Interupt.
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Junctor: A wire or cuircuit connection between networks in the same office.
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The functional equivalent to an intraoffice trunk.
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MF: Multifrequency - The method of signaling over a trunk making use of the
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simultaneous application of two out of six possible frequencies.
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NPA: Numbering Plan Area.
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ONI: Operator Number Identification - The use of an operator in a CAMA office
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to verbally obtain the calling number of a call originating in an office not
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equipped with ANI.
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PBX: Private Branch Exchange - (PABX: Private Automatic Branch Exchange) An
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telephone office serving a private customer, Typically , access to the outside
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telephone network is provided.
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Permanent Signal: A sustained off-hook condition without activity (no dialing
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or ringing or completed connection); such a condition tends to tie up
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equipment, especially in earlier systems. Usually accidental, but sometimes
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used intentionaly by cunstomers in high-crime-rate areas to thwart off
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burglars.
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POTS: Plain Old Telephone Service - Basic service with no extra "frills".
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ROTL: Remote Office Test Line - A means for remotly testing trunks.
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RTA: Remote Trunk Arrangment - An extention to the TSPS system permitting its
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services to be provided up to 200 miles from the TSPS site.
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SF: Single Frequency. A signaling method fro trunks: 2600hz is
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impressed upon idle trunks.
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Supervise: To monitor the status of a call.
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SxS: (Step-by-Step or Strowger switch) - An electromechanical office type
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utilizing a gross-motion stepping switch as a combination network and
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distributed control.
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Talkoff: The phenomenon of accidental synthesis of a machine-intelligible
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signal by human voice causing an unintended response. "wistleing a tone".
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Trunk: A path between central offices; in general 2-wire for interlocal,
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4-wire for intertoll.
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TSPS: Traffic Service Position System - A system that provides, under stored-
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program control, efficient operator assistance for toll calls. It does not
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switch the customer, but provides a bridge connection to the operator.
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X-bar: (Crossbar) - An electromechanical office type utilizing a "fine-motion"
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coordinate switch and a multiplicity of central controls (called markers).
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There are fove varieties:
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No.1 Crossbar: Used in large urban office application; (1938)
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No 3 Crossbar: A small system started in (1974).
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No.4A/4M Crossbar: A 4-wire toll machine; (1943)
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No.5 Crossbar: A machine originally intended for relatively small suburban
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applications; (1948)
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Crossbar Tandem: A machine used for interlocal office switching.
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>>===========================================================<<
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>>=> PHOR THE BEST IN TELECOMMUNICATIONS INPHORMATION READ <=<<
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>>===========================================================<<
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>> 2600 MAGAZINE, BOX 752, MIDDLE ISLAND, NY 11953-0752 <<
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>> 12$ A YEAR, 1$ FOR BACK ISSUES <<
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>>===========================================================<<
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>>=> FOR THE BEST IN TELECOMMUNICATIONS INPHORMATION MODEM <=<<
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>>===========================================================<<
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>> THE PRIVATE SECTOR BBS ... 300/1200 ...... (201) 366-4431 <<
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>> THE PEARLY GATES BBS ..... 300 BAUD ...... (203) 624-4425 <<
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>> SHADOWLAND BBS ........... 300 BAUD ...... (303) 939-9614 <<
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>> THE DARK FOREST BBS ...... 300/1200 ...... (516) 549-0268 <<
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>> THE BROADWAY SHOW BBS .... 300 BAUD ...... (718) 615-0580 <<
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>>===========================================================<<
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>> ANOTHER TELECOMMUNICATIONS PHILE FROM THE ARCHIVES OF THE <<
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|||
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>> PRIVATE SECTOR BBS (201) 366-4431, OFFICIAL BOARD OF 2600 <<
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|||
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>> FOR BEST RESULTS WHEN READING TRY 80 COLUMNS / LOWER CASE <<
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>>===========================================================<<
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Call The Works BBS - 1600+ Textfiles! - [914]/238-8195 - 300/1200 - Always Open
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