The DAG2500 Series FXS analog gateway is multi-functional voice gateway that provides seamless connectivity with analog phones, fax machine or analog PBXs to VoIP gateway. The overall frame of DAG2500 is compact and structured, supporting RJ45/RJ21 interface standards and up to 48/72/96 FXS voice interfaces at a size of 1U. In addition, DAG2500 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 provider, enterprises, community residents, and corporate telephone systems. DAG2500 supports standard SIP and RTP protocols and is compatible with multiple well-known platforms, for example, compatible with BroadSoft. It also works as extensions with various IPPBX products based on Asterisk and FreeSWITCH, and is also perfectly compatible with IMS/NGN softswitch platforms and call center systems. In addition, customers can build an enterprise branch communication network by using the DAG2500 to achieve interoperability between branches, which can provide an efficient, stable, and cost-effective voice communication solution for large enterprises.