Adtran Total Access 924
The Adtran Total Access 924 IP Business Gateway supports VoIP applications using SIP. It provides SIP-gateway functionality, a robust IP router, and firewall and VPN functionality.
It supports a number of analog and digital interfaces for existing phone equipment, or for the combination of an IP PBX and an analog fax, phones, or modem. Ideal for networks transitioning to VoIP and an all IP voice and data WAN.