Brief

A Unix service that provides gateway functionality for GSM modems and TCP/IP network clients via ISDN. It serves multiple point to point connections between GSM and TCP/IP clients simultaneously.  The utility supports data transmission channels over ISDN.

Architecture

The utility is implemented as a server running on a Unix machine equipped with Beronet ISDN cards. It provides transparent data channels for TCP/IP network clients allowing them to communicate with GSM modems using AT commands. In other way it accepts incoming calls from GSM modems and establishes data channels for the first available TCP/IP network recipient registered in the system.
The system provides configurable logging for all communication events. The system is capable to work with several ISDN cards simultaneously.