The Cisco VG400 Analog Voice Gateway provides enterprises and service providers with a robust solution for connecting public-switched telephone networks (PSTNs) and existing telephony equipment to Cisco 4000 Series Integrated Services Routers. This medium-density analog voice gateway features 8 FXS ports for exceptional voice quality and telephony functionalities, along with 2 Gigabit Ethernet ports for high-speed data transfer. It supports advanced features such as Dual-Tone Multifrequency (DTMF) detection, voice compression, echo cancellation, and adaptive jitter buffering, making it an ideal choice for businesses looking to transition from TDM to IP. The device is rack-mountable and includes a management port for enhanced connectivity and control.