Total Access 924e IP Business Gateway- Designed for WAN flexibility using Ethernet or T1 WAN. Includes 1 Gigabit 10/100/1000 BaseT port tw10/100 BaseT interfaces four T1 interfaces 24 FXS ports and IP Router. Includes lifeline FXO interface. VoIP gateway supports simultaneous Back-to-Back User Agent (B2BUA) and SIP proxy functionality. Includes G.168 EchCancellation support for G.711 and G.729a CODECs and supports up t60 simultaneous TDM tVoIP call conversions. Supports VoIP applications using SIP (for analog PRI and IP endpoints/PBX) and MGCP (for analog only). Router features include OSPF BGP RIP V1/V2 Static routes VRRP multi-VRF and stateful inspection firewall. OPTIONAL Session Border Controller Feature Pack alsavailable.