#central__telephone_exchange__telephoneexchange__exchange  a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication
  supertype:  workplace__work  a place where work is done; "he arrived at work early today"
  subtype:  centrex  switchboard
  part of:  telephone_system__telephonesystem__phone_system__phonesystem  a communication system that transmits sound between distant points

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