Is VoIP cheaper than PSTN?

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Tags

1. #internet
2. #rather
3. #landline
4. #significantly
5. #system
6. #because
7. #cheaper
8. #connection
9. #short
10. #other
11. #phone
12. #existing
13. #hardware
14. #additional
15. #answer
16. #separate
17. #requiring