Adattatore telefonico analogico Grandstream HT813 1 porta FXS e 1 porta PSTN linea FXO ATA
For added flexibility, the FXS port extends VoIP service to one analog device. Supports 2 SIP profiles through 1 FXS port and 1 FXO port. Failover SIP server automatically switches to secondary server if main server loses connection.