Important Facts of VoIP Gateway you Need to Know

VoIP Gateway plays an important role in the VoIP industry. To enrich your knowledge about VoIP technology and make your business successful, you need to understand about VoIP Gateway clearly.

VoIP gateway


VoIP Gateway is a crucial component of the VoIP industry. It is a device which acts as a bridge between the normal telephone system and VoIP. VoIP is a relatively new technology. The revolutionary features of VoIP leads the world of telecommunication to a new future. People prefer VoIP primarily because of its cost effectiveness. The features of VoIP evolve each year. The new additional features make VoIP more user friendly and interesting. You can get the latest trends of the VoIP industry from 7 Latest Trends that VoIP Service Providers Must Follow. In the transition of the old telephonic system to VoIP, there arises a need to connect the two. Thus comes the utility of VoIP Gateway. The VoIP Gateway connects the phone system with the VoIP resources.


What is a VoIP Gateway?

According to the definition of VoIPSupply, VoIP Gateway is a device that converts TDM telephony traffic from the PSTN into digital packet or IP packet. Thereafter the transportation of these digital packets over IP network takes place. A VoIP Gateway also has the ability to convert digital IP packets into TDM telephony traffic for transportation across the regular PSTN. TDM or Time Division Multiplexing is a method of transmitting and receiving independent signals over a common signal path.


How does a VoIP Gateway work?

The working of a VoIP Gateway is simple. The source of VoIP traffic is important for this process. The VoIP gateway converts the VoIP traffic according to its origin. This conversion of the VoIP traffic into an acceptable form is necessary. The destination network receives the VoIP traffic in the compatible form. When the traffic originates from PSTN, VoIP gateway will convert the analogue voice signal into a digital signal. Thereafter, by using a signalling protocol, transmission of the digital signals take place. For this process of transmission, further conversion of the digital signal into a series of packets take place. For a VoIP Gateway to work properly, a protocol and codec is necessary. It is also important for the protocol and the codec to be compatible with the VoIP Phone system or VoIP Service.

VoIP gateway


Types of VoIP Gateway

There are two main types of VoIP Gateway, firstly, Analog VoIP Gateway and secondly, Digital VoIP Gateway.

  • Analog Gateway:

The analog gateway connects the traditional analog telephone to a VoIP phone system or a VoIP phone system to a PSTN. Therefore to perform both of the actions, there are 2 forms of analog gateway: FXS and FXO.

The FXS gateway connects the traditional telephone and fax machine to a VoIP phone system. While the FXO gateway connects the VoIP phone system to the PSTN line.


  • Digital Gateway:

The digital gateway connects the VoIP phone system to digital voice lines. This gateway also helps to connect the traditional PBX system to an IP network.

Both the VoIP gateways are similar in their functionality. But there is one difference. The main difference between the two is the interface. Each gateway use different interface to bring and connect together various solution components.


Features of VoIP Gateway

The prevalent functions of a VoIP gateway includes voice and fax compression or decompression, conversion of voice traffic into digital or IP packets, call routing and control signalling. At times advanced VoIP Gateways may have a few extra features. For example interface to external controllers such as softswitch, billing system and network management system.

The routing functions are inbuilt in a VoIP gateway. This enables the gateway to adapt calls from one medium to the other. Thus gateways can recognize various patterns and route them across different interfaces. A typical VoIP gateway can connect to multiple VoIP endpoints, which allow the sharing of PSTN resources between multiple IP communications system. VoIP gateways can also convert VoIP calls from one code to another through the process of transcoding.

A VoIP gateway helps to increase the productiveness in a business communication system. The key benefit of the VoIP gateway is its cost effectiveness and the flexibility that it offers. The VoIP Gateway makes it possible to continue with the traditional system instead of switching to an IP based advanced PBX system.  This is because the traditional phone system will have the features of VoIP technology through the VoIP gateway.

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