A VoIP gateway acts as an interface between a public switched telephone network (PSTN) and an IP network, converting voice and fax calls between the two in real time. Key functions include voice and fax compression/decompression, packetization, and call routing. There are analog gateways for connecting PSTN lines to VoIP systems and digital gateways for connecting PBX systems. When selecting a gateway, factors to consider include call load, supported protocols and compatibility, and cost.

1. VOIP GatewaysNayomiRanamuka

2. OverviewIntroduction

3. Network gateway

4. What is a VOIP Gateway ?

5. VOIP Gateway protocols and codecs

6. How does a VOIP Gateway work?

7. Convergence with VOIP Gateway

8. Types of VOIP Gateway

9. Media Gateway Controller

10. Signaling Gateway

11. Factors to purchase a gateway

12. Standard VoIP gateway Configurations

13. Examples of VOIP gateways

14. SummaryVOIP Gateway 3

15. IntroductionVOIP allows cheap phone call , call conferencing , voice mail over the internetSome VoIP service providers offer live broadcasts of radio shows and sports eventsComponents of a VoIP network User agents Gateways Proxy serversSelecting the right gateway is a crucial

16. Understanding the role VoIP gateway is very importantVOIP Gateway 3

17. Voice traffic over IP networks PC to PC Need a pc with sound card

18. IP telephony softwarePC to phoneNeed a gateway that connects IP network to phone network ( Router to PBX )VOIP Gateway 4

19. (3) Phone to PhoneNeed more gateways that connect IP network to phone network

20. Ip network could be Internet or dedicated intranetVOIP Gateway 5

21. Network gatewayIt is a network point that acts as an entrance to another network

22. A gateway links two systems that do not use the same:

23. Communication protocols , Languages

24. Data formatting structures , Architecture

25. It can be implemented in software, hardware, or as a combination of both Ex:- Electronic mail gateways(X.400 gateway) receive messages in one format, and then translate it and forward in X.400 format used by the receiver, and vice versa. VOIP Gateway 6

26. What is a VoIP gateway?Act as conversion interface between PSTN and an IP network

27. This device converts voice and fax calls, in real time, between the public switched telephone network (PSTN) and an IPnetwork

28. The primary functions of a VoIP gateway include

29. voice and fax compression/decompression

30. packetization