For further  assistance, contact Autonet  Client Support at  1-800-521-2733
or  1-313-995-6595.


                         Autonet Communications Glossary 
 
 
  Access Location     A city in which Autonet can be accessed through a
                      toll-free telephone call.
 
  AHIP                Asynchronous Host Interface Processor.  A com-
                      munication computer that connects a host computer to
                      Autonet.
 
  Asynchronous ASCII  A device consisting of a keyboard which represents 128
  Terminal            distinct characters (such as upper and lower case
                      alphabetics, numerals, punctuation and control
                      characters) and a display screen or printing mechanism.
                      The terminal is used to send data to, or receive data
                      from a computer by a start-stop transmission method.

  ATC                 Asynchronous Terminal Concentrator.  An Autonet network
                      access service arrangement which also features local
                      async ports for multiple terminals.
 
  Autonet             An Autonet access facility consisting of one or more
  Communication       network nodes.
  Center
 
  AutoWATS            A host interface arrangement for users whose initial
                      data communications needs are small.  The service
                      provides subscribers with value-added WATS service at
                      50% less than conventional WATS lines.
 
  Bit                 The smallest unit of data.
 
  BPS                 Bits Per Second.  A rate of speed at which bits are
                      transmitted.
 
  CCITT               The International Consultative Committee for Telegraphy
                      and Telephony of the International Telecommunications
                      Union, which recommends industry standards.


  Dial Back-up        A service option which establishes a temporary circuit
                      to route around line or node failures.
 
  DTF                 Dedicated Terminal Facility.  An Autonet network access
                      service arrangement which features a hardwired
                      connection to an access port.
 
  Error Detection     A system which detects transmission errors and causes
  and Correction      data to be retransmitted until it is received
  Code                correctly.
 
  Front End           A device which performs communications processing and
  Processor           certain protocol functions before passing data to the
                      host.
 
  HAL                 Host Access Line.  A single leased line which supports
                      one simultaneous connection between a host computer and
                      a network node.
 
  HCF                 Host Communication Facility.  A leased com-munication
                      line which connects a host computer to a network node.


  Host                A computer system which processes data, as contrasted
                      to a computer used for communications purposes.
 
  Leased Access       A communication line used to connect client equipment
  Channel             to a port at an Autonet Communication Center, or to a
                      concentrator.
 
  Modem               A device which converts digital signals to analog form
                      for transmission over telephone lines.
 
  Node                An Autonet communication computer which accepts and
                      transmits packets, and performs network access and
                      interface functions.
 
  Non
 Prime           A cost-saving Public Dial-In service option featuring
  Subscription        reduced rates during off-peak business hours.
 
  Packet              A unit of traffic on a packet-switching network.  A
                      packet consists of a destination address, special
                      control function characters, error detection code, as
                      well as message data, all arranged in a special format.


  Packet-switching    Method of transmitting data between client equipment by
                      means of formated packets.
 
  Port                A communication interface between Autonet and a
                      terminal or host computer.
 
  Private Rotary      A service option which features access to a number of
                      access ports through a single private number.
 
  Protocol            A pre-established order for the transfer of data over a
                      communications channel.
 
  Remote Access       A network connection which establishes communication
                      with data processing equipment from a distant location.
 
  Traffic             Data transmitted between user terminals and host
                      computers via Autonet.
 
  Virtual Dedicated   A billing option which features a flat monthly rate in
  Ports               lieu of Public Dial-In access and traffic charges.

  X.25                The industry standard packet-switching protocol
                      approved by the CCITT.
 
  XHIP                X.25 Host Interface Processor.  An Autonet host
                      interface service arrangement which features multiple
                      terminal access over a single communication line.
