How do PRI lines work?

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Tags

  1. #calls
  2. #conjunction
  3. #support
  4. #generally
  5. #circuit
  6. #single
  7. #technology
  8. #which
  9. #refer
  10. #caller
  11. #channel
  12. #systems
  13. #exchange
  14. #voice
  15. #private
  16. #lines
  17. #other
  18. #concurrent
  19. #related
  20. #business
  21. #branch