Grandstream HT813 analog telephone adapter (ATA) that provides the following: - Support for two (2) SIP profiles through one (1) FXS port and one (1) FXO port - Dual 100Mbps LAN and WAN ports - Failover SIP server automatically switches to secondary server if main server loses connection- Device is NOT preprogrammed. Non-cancelable, non-returnable (NCNR).
