NetVanta NIM/VIM module slots, 24 Power over Ethernet 802.3af10/100 access ports, two Combo10/100/1000/SFP Gigabit ports, one10/100 WAN Ethernet port, two analog trunk (FXO) ports, two analog station (FXS) ports, music-on-hold input, paging output, and door relay. IP PBX supports 50 SIP phones and includes voicemail (12 hours, 8 ports), auto attendant (8 ports), call detail records, and e-mail notification of voicemail. Switch features include 15.4 watts/port PoE (370 watts total), 802.1Q VLANs, 802.1p/DiffServ QoS, 802.1w Rapid STP, 802.3ad Link Aggregation, Auto MDI/MDI-X. Router features include Static, RIP, OSPF, BGP, Frame Relay/PPP WAN Protocols, Stateful Inspection Firewall, and VPN (50 IPSec tunnels). System management features include Web GUI, CLI, HTTP/HTTPS GUI, SSH, RADIUS and TACACS+. Supports NetVanta Voice Interface Modules and NetVanta Network Interface Modules. 19" 1U housing. Rackmount and wall-mount brackets included. 5-year warranty. Can only be purchased by ADTRAN certified IP Telephony Dealers.