This product is a replacement for: ADTRAN - Total Access 904 (2nd Generation) (4212904L1) The Total Access 908 IP Business Gateway provides SIP-gateway functionality, a robust IP router, firewall and VPN functionality, and support for a number of Analog and digital interfaces for existing telephone equipment, or for the combination of an IP PBX and an analog FF AX, telephones or modem. Part numbers are available for both single T1 and single ADSL2+ WAN interfaces. Cost-effective, carrier-class IP enterprise gateway for integrated services such as VoIP Supports up to 8 analog FXS interfaces for legacy equipment Single Ethernet interface for data connectivity Comprehensive DSX-1 PRI/CAS for PBX connectivity Transparent proxy with survivability for outages Network Voice Quality Monitoring (VQM) to improve Quality of Service (QoS) Supports industry-leading softswitches and calling agents Full-End Featured IP router for data support and Internet access Stateful inspection firewall for network security Quality of Service (QoS) for delay-sensitive traffic as the VoIP command line interface (CLI) mimics the de facto industry standard ADTRAN Operating System (AOS)