switchboard

Từ điển Oxford Learners Wordfinder Dictionary

noun

telephone central where circuits are completed with patchcords (Freq. 1)
• Syn:
patchboard, plugboard
• Hypernyms:
central, telephone exchange, exchange
• Part Holonyms:
telephone system, phone system

• Từ đồng nghĩa / Synonyms:
  patchboard, plugboard