A GSM VoIP Gateway is a device that bridges Voice over Internet Protocol (VoIP) networks and GSM networks. It enables businesses to route voice calls between internet-based VoIP systems and mobile networks, facilitating communication through mobile SIM cards while leveraging VoIP technology. This integration is widely used in industries requiring cost-efficient telephony and flexible mobile communication. It helps in improved communication flexibility, Enhanced call management, Backup communication option, International Reach, and Application in Bulk SMS Services.