comms#telecom_and_traffic_object__telecomandtrafficobject
  supertype:  traffic_object  telecom_object
  subtype:  asynchronous_transfer_mode__ATM  a means of digital communications that is capable of very high speeds; suitable for transmission of images or voice or video as well as data; "ATM is used for both LAN and WAN"
  subtype:  frame_relay
  subtype:  ISDN  integrated services digital network
  subtype:  subscriber_line
     subtype:  ADSL  asynchronous subscriber line, assymetric digital subscriber line
     subtype:  DSL  digital subscriber line, HDSL, VDSL

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