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          1. News

            News

            Elevator Emergency Failover Solution with FXO Gateway

            Solution Background

            Building call box as analog terminals for emergency calls in the elevator. When the VoIP gateway disconnects with the SIP server, in case the internet is disconnected, or theSIP server is faulting, needs to use the call box to make outbound calls and realize emergency failover.

            Providing high reliable environment for user in the elevator, whenever the emergency happens, they are still able to make calls through the call box to connect to the building management and get help.


            Function Definition

            Use the FXO gateway to provide customers with alternative lines.

            When the FXS VoIP gateway and SIP server is disconnected, the call is automatically sent to the FXO PSTN line for outbound calls, providing a high-reliability guarantee for the customer's voice communication in the elevator.


            Solution1 Non-FXS/FXOHybrid Gateway

            Instructions

            1.The FXS gateway registers to the SIP server through the Internet, and the FXO gateway connects to PSTN.

            2.FXS and FXO gateway in the same local network.

            3.Using the active standby function of the FXS gateway, when the SIP server is not accessible, the calls will be sent to the FXO gateway, realize emergency failover.


            Solution2 Non HybridGateway with Call Box

            Instructions

            1.The new FXO gateway 2registers to the SIP server through the Internet, the call box connect to the FXO gateway 2through analog phone line.

            2.The twoFXO gateways in the same local network.

            3. Using the active-standby function of the FXO gateway 2, when the SIP server is not accessible, the calls will be sent to the FXO gateway 1connected to PSTN.


            Solution3 FXS+FXO Hybrid Gateway




            Instructions

            1.The VoIP gateway has both FXS andFXO ports.

            2. FXS registers to the SIP server through the Internet, and the FXO ports connect to PSTN.

            3.Using the failover function of the gateway, when the SIP server is not accessible, the calls will be sent to the FXO ports.


            Solution Value Proposition


            1. Help migrating legacy building call box to cloud and save cost on PSTN connectivity.
            2. Unified call hang up mechanism across different call box brands.
            3. Preserve existing wiring and call box whether they are FXS terminal type like Viking W-E30 or FXO station type like Viking W-3000.
            4. Simple, scalable and secure for installation, configuration and operation.


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