- Supports 2 SIP profiles through 4 FXS ports and dual Gigabit ports - Includes a built-in NAT router which can handle routing speeds up to 100MBps - TLS and SRTP security encryption technology to protect calls and accounts - LED Indicators - POWER NET1 NET2 PHONE1 PHONE2 PHONE3 PHONE4 - Automated provisioning options include TR-069 and XML config files - Supports 3-way voice conferencing - Failover SIP server automatically switches to secondary server if main server loses connection - Supports T.38 Fax for creating Fax-over-IP - Supports a wide range of caller ID formats - Use with Grandstream�s UCM series of IP PBXs for Zero Configuration provisioning