A VoIP Gateway, or Voice over IP Gateway, is a network device that converts fax and voice calls between an Internet Protocol (IP) network and a public switched telephone network (PSTN). This device bridges conventional telephone equipment and networks to telephone networks that use the VoIP technology.
The types of VoIP Gateways are analog units and digital units.
Functions of VoIP Gateways
Its principal functions include:
- Call routing,
- Fax/voice compression/decompression
- Control signaling
Other functions include interfaces to external controllers, such as network management systems, billing systems, and Gatekeepers or Soft Switches.
Majority of VoIP gateways have at least one telephone port and one Ethernet port. Protocols like SIP, LTP, or MGCP help in controlling a gateway.
Advantages of VoIP Gateways
One of the major advantages of a VoIP gateway is that it can provide connection to your present fax machines and telephone through the traditional key systems, PBXs, and telephone networks. This makes the procedure of making calls through the IP network familiar to VoIP users.
VoIP gateways can finish a telephone call and can give user admission control with the Interactive Voice Response (IVR) system. They can also present the call’s accounting records. They will help lead outgoing calls to a specific destination, or finish the call from another gateway and give a call to the PSTN.
VoIP gateways have a crucial role in developing carrier services. They also support the ease of the telephone calls for trouble-free access and less cost. Compliant call integration is enhanced at a lesser amount to allow distinctive ring tones and programmable call progress tones.
Potentials of VoIP in the Future
For many years, VoIP gateway has proven to be a proficient and adaptable solution in voice connectivity and office data. Aside from its good connectivity operation, VoIP also provides better dependability under various situations.
The potentials of VoIP in the near future are very apparent and clear-cut. Scaleable, open, and high-density platforms have to be developed and employed to enable the millions of telephones and the rapidly escalating number of H.323 computer clients (such as MS NetMeeting and Netscape Communicator) to keep in touch over IP.
A number of VoIP developers are currently designing interoperable VoIP gateways based on the most recent architectures. They aim to cater to the shifting demands of individual carriers, corporate network clients, and service providers.