What is SIP in PBX?

Related questions

1. What is did in SIP?
2. What is AHT formula?
3. When was PBX invented?
4. How do PBX phones work?
5. How many types of Epabx are there?
6. How do I install a PBX phone system?
7. What is PRI in telecom?
8. How does a PBX telephone system work?
9. How does a PABX work?
10. What is a PRI line?

Tags

1. #individual
2. #enabled
3. #internet
4. #branch
5. #company
6. #connect
7. #networks
8. #mobile
9. #lines
10. #external
11. #calls
12. #telephone
13. #exchange
14. #private
15. #system
16. #connects
17. #protocol
18. #extensions