4 FXS, 2 GIGE, NAT Router 2 SIP profiles 4 FXS ports Dual Gigabit ports Built-in NAT router TLS & SRTP security encryption technology Automated provisioning options 3-way voice conferencing Failover SIP server T.38 Fax for creating Fax-over-IP Wide range of caller ID formats Interfaces Telephone Interfaces - Four (4) FXS ports Network Interfaces - Two (2) 10/100/1000Mbps RJ45 ports LED Indicators - POWER, LAN, WAN, PHONE1, PHONE2 Factory Reset Button - Yes

Voice, Fax, Modem Telephony Features - Caller ID display or block, call waiting, flash, blind or attended transfer, forward, hold, do not disturb, 3-way conference Fax Over IP - T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax Pass-through Short/Long Haul Ring Load - 3 REN, up to 1km on 24AWG line Caller ID - Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID Disconnect Methods - Busy Tone, Polarity Reversal/Wink, Loop Current

Signaling QoS - Layer 2 (802.1Q VLAN, SIP/RTP 802.1p) and Layer 3 (ToS, Diffserv, MPLS) DTMF Method - In-audio, RFC2833 and/or SIP INFO Provisioning and Control - HTTP, HTTPS, TELNET, TFTP, TR-069 , secure and automated provisioning using AES encryption, syslog