The Dinstar Multi-SIM GSM 3G/4G VoIP Gateway is a versatile communication device designed to integrate traditional GSM, 3G, and 4G mobile networks with VoIP systems. It supports multiple SIM cards, enabling cost-effective and efficient routing of voice calls. Key features include robust call management, SMS sending and receiving, USSD support, and flexible routing strategies. It offers high compatibility with various SIP-based systems and ensures secure communication through encryption protocols. The gateway is ideal for businesses looking to optimize costs, & enhance connectivity