Today, high-quality communication is no surprise. Manufacturers are focused on solutions that can make communication between subscribers the most convenient. In addition, active users, who use VoIP connection for communication, increase as it provides more features than the traditional PSTN and GSM networks.
VoIP telephony is available and allows you to make cheap calls to another city or country. It is an ideal solution for the organization of warehouses and offices when installing fixed lines is problematic. Unlike traditional telephony, one does not need to pay for additional VoIP lines.
An important link between the PSTN, GSM, and PC when you organize the Internet telephony is a VoIP GSM gateway. The device forwards the calls to the correct format. When you connect it, a call is carried out as follows "office IP-based network -> the GSM gateway -> mobile operator subscriber".
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There are several types of gateways:
- Network-to-network gateways;
- GSM gateways;
- Cellular gateways;
- VoIP GSM gateways;
- Multi gateways.
Network-to-network gateways transfer traffic from traditional PBX to VoIP-network. GSM gateways transmit calls from a fixed communication network to the GSM network, and vice versa. Cellular gateways are designed to redirect the signal to the mobile networks of all standards - GSM, UMTS, CDMA, etc. Multi gateways translate traffic between multiple networks (PSTN, GSM, VoIP).
As for a way of connection, there are analog (FXS, FXO) and digital gateways. They are an excellent alternative to 3G modems. Connecting the gateway to organize the VoIP telephony, you can save on additional equipment. And when you buy a device with FXS ports, you will not need a SIP-phone.There are many models of gateways from different manufacturers - AddPac, Cisco, D-Link, Q-Tech, Rad Data Communications, GoIP, EjoinTech & China Skyline. The selection of a device depends primarily on the number of communication channels necessary for efficient communication in the office.
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