Radio over IP GSM Gateway has been designed as a gateway between the Conventional Analog or Digital Two Way Radios with the IP Protocol and the GSM 2G Network. It is an advanced version of ROIP with added feature of 2G GSM Voice Connectivity. It can be used as a GSM Voice Call Patch with the Wireless Radio Network. It has Broadband Ethernet Port (RJ45) and 2G Sim Card Slot.