What’s VoIP gateway

VoIP gateway is used to build bridges between traditional telephony and VoIP world. Gateways are often used to connect a traditional phone system (PBX or ACD) and VoIP resources, or connect modern VoIP phone system with traditional telephone lines.

In traditional PBX phone systems add VoIP network system is to add functionality, reduce cost of doing business one way to success. Gateway to connect to legacy systems via analog or digital trunk port. PBX telephone system will be regarded as the gateway company or another networked PBX system. Outgoing calls from the PBX to the outside world will be converted into a VoIP phone, and sent to the VoIP service provider or other VoIP calls through the network. VoIP calls placed from the telephone network will also be converted into the corresponding protocol and transferred to traditional PBX systems.

In SIP trunk is unavailable or PSTN system reliability applications is not strong, you can use the gateway to connect to the VoIP telephone system and a traditional telephone line. Use this gateway can also easily create redundant systems. Gateways usually associated with major IP PBX. When the main IP PBX fails, the backup system may also be a gateway for data transmission.

Other features also include VoIP gateways segmented transfer. Gateway can be connected to PSTN systems, the traditional PBX systems and new IP PBX system. In this case, PSTN trunk interface to connect to a gateway device. Another interface connected to a conventional PBX system trunk port. The new IP PBX systems are integrated via VoIP protocols (typically SIP). The gateway to some of the incoming calls to the traditional PBX systems or other IP PBX systems. It also enables call transfer between two PBX systems. This makes the case that people have turned to IP systems, some departments or branches of the company to retain the existing system.

Basic and main features

The gateway has several formats. Analog Gateway can translate between VoIP protocols and traditional analog phone lines or (and) phone. Digital Gateway can switch between VoIP calls and a variety of digital phone service, depending on the gateway formats: T1, E1, PRI and / or BRI.

Gateways typically can connect to multiple VoIP terminals (equipment or services), which allows PSTN resource sharing among multiple IP communication systems.

Gateway has a routing function makes it possible to flexibly adapt from one medium to another call. For example, customers can transfer a call to add or remove digital dial string. In addition, the system can identify a variety of ways, and provide guidance on different interfaces.

VoIP gateway can be used to call from one code to another code, a process also known as transcoding. When the system is connected to a variety of VoIP solutions, this method is very effective.


Gateway can “enable Internet telephony” extend the life of legacy equipment. This can include traditional trunk lines to SIP trunks, or some VoIP Internet phone traffic is transmitted to a remote PBX or gateway – a process called long-distance bypass.

Gateway can increase the flexibility of the system. Not just the traditional PBX into IP PBX, companies can also transfer data through the gateway the bridge.

use asterCC as gateway

asterCC using standard computer and one or more telephone interface card to build gateways. asterCC asterisk-based products, all asterisk compatible devices can be used. No matter which brand you choose, the final product will be notable for its flexibility and price far beyond the traditional gateway products. And because asterCC functionality, but also provide additional features such as billing, cascade, voice transcoding, to further enhance the cost.