ADTRAN 4700252F2SBC Session Border Controller

ADTRAN NetVanta 6250 8 FXS with Lifeline FXO (part number 4700252F2SBC) is an enterprise‑class IP business gateway that combines VoIP routing with an integrated Session Border Controller to securely interconnect SIP trunking and traditional telephony. It provides eight FXS ports for connecting internal phones and a Lifeline FXO interface (RJ‑11) for analog trunk connectivity, enabling local PSTN fallback and survivability in IP telephony deployments. The SBC Feature Pack supports border control for SIP signaling, and this variant is documented to support up to 100 simultaneous SBC sessions, making it suitable for small‑ to mid‑sized organizations migrating to SIP trunking while maintaining legacy lines. As part of the NetVanta 6000 series, it is designed to integrate voice services with data networking in a single appliance for streamlined management of enterprise VoIP and security at the network edge.