A VoIP media gateway that effectively connects the mobile GSM/4G network to the IP network (VoIP) is the Synway 32 Port GSM Gateway (such as the SMG4032 series). It is intended for businesses and service providers to build flexible, affordable Wireless-to-IP communication systems and enables 32 concurrent calls.

Learn more: 4, 8, 16, & 32 Port GSM Gateways - Gsmgateway.in

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