If power goes out or Internet service is lost, calls can be safely redirected to a traditional carrier via the standard analog interface.
One RJ-11 POTS (Plain Old Telephone Service) FXS port to connect an existing analog phone or fax machine
One PSTN FXO port to connect to a Telco or PBX circuit
Two 100BaseT RJ-45 Ethernet interfaces to connect to a home or office LAN, and an Ethernet connection to a broadband modem or router
FXS and FXO lines that can be independently configured
Secure encryption-based methods for communication, provisioning, and servicing