Replacement for the popular SPA-3000, offers both 1 FXS station side port and 1 FXO PSTN jack, and features integrated call routing for local and emergency calls, excellent for service providers and remote offices! The SPA-3102 NA features VoIP adapter functionality found in the SPA-2002 and SPA-1001 with the additional benefit of an integral connection for legacy telephone network applications. If power is lost to the unit or the VoIP service is down, calls can be sent to a traditional carrier via the FXO interface.