What is difference between SIP and PRI?

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Tags

1. #connections
2. #quality
3. #connection
4. #service
5. #telephony
6. #company
7. #actual
8. #voice
9. #model
10. #difference
11. #circuit
12. #system
13. #requires
14. #connect
15. #guaranteed
16. #physical
17. #addition
18. #switched
19. #endpoints
20. #since
21. #between