DAG3000-312S FXS analog gateway is a multi-functional voice gateway that provides seamless connectivity with analog phones, fax machine or analog PBXs to VoIP gateway. The overall frame of DAG3000-312S is compact and structured, supporting RJ21 interface standards and up to 312 FXS voice interfaces via user boards plugging at a size of 3U. In addition, DAG3000-312S provides high-performance hardware solution with good voice/fax processing capability. It is able to provide efficient and high-quality IP voice services for service providers, enterprises, community residents, and hospitalities.