AudioCodes Mediant 1000B Gateway and E- SBC, hereafter referred to as device, offers a complete connectivity solution for small-to-medium sized enterprises. The device connects IPPBXs to any SIP trunking service provider. It offers superior performance in connecting any SIP to SIP environment, legacy TDM-based PBX systems to IP networks, and IP-PBXs to the PSTN in a modular 1U platform. The device supports a wide range of voice coders and is capable of transcoding between narrowband and wideband voice coders, providing SIP normalization, fax handling, gain control and numerous additional media processing features. It offers certified interoperability with leading unified communications solutions and SIP trunking providers. The device provides robust protection for IP communications infrastructure, preventing Denial of Service, fraud and service theft and guarding against cyber- attacks and other serviceimpacting events. The device maintains high voice quality to deliver reliable enterprise VoIP communications. Advanced call routing mechanisms, network voice quality monitoring and branch survivability capabilities (including PSTN fallback with E911) result in minimum communications downtime.