2-FXS Port with a PSTN Bypass port VOIP GatewayVOIP Phone Single account registerGSM VOIP GatewayVOIP Gateway 1-FXS Port with a PSTN Bypass portVOIP Gateway 4 -FXS PortVOIP Gateway 8 -FXS PortVOIP Gateway 2 -FXS PortVOIP Gateway 1 -FXS PortVOIP Gateway 4-FXO PortVOIP Gateway 2-FXO PortVOIP Gateway 1-FXO & 1-FXS PortsVOIP Gateway 2-FXO & 2-FXS PortsVOIP Gateway 4-FXS & 4-FXO PortsVOIP 4-FXS Ports with 4 Bypass Port GatewayVOIP 2-FXS Ports with 2 Bypass Port GatewayVOIP 4-FXO & 4-FXS Mixed type GatewayVOIP 2-FXO & 2-FXS Mixed type GatewayVOIP 1-FXO & 1-FXS Mixed type Gateway4-FXO Port VOIP Gateway1 -FXS Port VOIP Gateway2 -FXS Port VOIP Gateway8 -FXS Port VOIP Gateway4 -FXS Port VOIP Gateway1-FXS Port with a PSTN Bypass port VOIP Gateway2-FXS Port with a PSTN Bypass port VOIP GatewayVOIP PhoneGSM VOIP Gateway2-FXO Port VOIP Gateway