- SIP/MGCP protocols - 500 routing and number manipulation rules - Fax over IP using T.38 & G.711 pass-through - Dual redundant Ethernet ports - Dual DC/AC power supplies available - PSTN failover - TLS/SRTP - Auto provisioning - Remote access via the Redstone Cloud* - Management with the Redstone or third-party Remote Device Management Systems (TR-069 SNMP) - Interoperability with popular SIP servers such as Cisco CallManager/CUCM Broadsoft Microsoft Skype for Business (Lync) and Asterisk/Elastix - Class I lightning protection