What are SIP calls?

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Tags

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  2. #works
  3. #company
  4. #there
  5. #regular
  6. #current
  7. #lines
  8. #phone
  9. #voice
  10. #instead
  11. #stands
  12. #connection
  13. #protocol
  14. #internet
  15. #physical
  16. #trunk
  17. #systems
  18. #virtually
  19. #installed
  20. #multiple
  21. #initiation