Answering Machines

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Across
  1. 3. An indicator that glows
  2. 4. Sound a phone makes
  3. 7. Very important and immediate
  4. 8. A short, sharp sound
  5. 10. Electrical energy
  6. 13. A piece of equipment
  7. 15. Crackling noise on a line
  8. 17. To hear sound
  9. 18. A small plastic case with tape
  10. 22. To return
  11. 23. Where the machine might be
  12. 26. Spoken sound
  13. 27. The hour and minute
  14. 28. To make a call number
  15. 29. To contact by phone
  16. 31. To go back on a tape
  17. 34. Device used for calls
  18. 36. A recorded communication
  19. 38. Device that outputs sound
  20. 40. To end a call
Down
  1. 1. Sound level
  2. 2. A continuous low, buzzing sound
  3. 5. Digits used for calling
  4. 6. To end a recording
  5. 9. A common farewell
  6. 11. A temporary halt
  7. 12. Telephone connection
  8. 14. A short, sharp sound from a button
  9. 16. To save sound
  10. 19. Magnetic ribbon for recording
  11. 20. To pause before action
  12. 21. A control you press
  13. 24. To delete a message
  14. 25. A common greeting
  15. 30. A signal or warning
  16. 32. The day, month, and year
  17. 33. A low, steady sound
  18. 35. Away from home
  19. 37. To store a message
  20. 39. To start a recording