A VoIP (voice over internet protocol) gateway converts telephony traffic into internet protocol (IP) for transmission over a data network. It works in two ways: converting incoming PSTN/telephone lines to VoIP/SIP and connecting traditional PBX/Phone system to the IP network. Other functions include voice and fax compression and decompression, packetization, call routing, and control signaling.
A VoIP gateway converts voice calls and faxes between a public switched telephone network (PSTN) and an IP network. It also allows users to make VoIP calls through a VoIP service provider. They are commonly used by companies to reduce call costs by routing calls through the Internet instead of a telephone line.
Types of VoIP Gateways
Kinds of VoIP Gateways include the following:
Analog VoIP gateway
An analog VoIP gateway connects to regular analog phone lines. It can handle two to 24 lines.
Digital VoIP gateway
A digital VoIP gateway is used for connecting to digital phone lines. It connects one or more T1 lines in the United States, and BRI ISDN and PRI/E1 lines in Europe.
Choosing VoIP Gateways (Buying tips)
Features: Choose a VoIP gateway with additional features such as an interface for external controllers, a network management system, and a billing system for better efficiency.