It is a device capturing and controling all the signals, which are being created by the whole system, especially the made and received phone call signals. The device is mostly used for connecting regular phone system with the Internet and backwards.
Analog GSM Gateway Topex Voxell is a simple and reliable way to reduce the cost of mobile communications for small and medium-sized companies. By connecting Voxell to a corporate telephone system you will be able to send all outgoing mobile calls through a gateway directly to the cellular network that supports GSM/3G standards, skipping expensive connections through wired lines.