FXS/FXO Lifeline Implementation
The “Life Line” feature is a telecommunications feature that ensures users can still place or receive a Public Switched Telephone Network (PSTN) call
in emergency situations or when there is a disruption in the internet service (SIP registration loss). The feature operates by connecting the PSTN line
to an analog phone that is connected to the FXS port.
FXO/FXS Lifeline Support
*Refer to the following lifeline port info table:
The three modes of operation are as follows:
Auto Mode (Default): In Auto mode, the Life Line feature will automatically activate when there is a power loss or when the device loses its
registration with the SIP server (which means the VoIP service is unavailable). When this happens, the PSTN line will be seamlessly connected to
the analog phone connected to the FXS port. This allows users to make and receive traditional phone calls through the PSTN network, providing
a backup communication method during emergencies or internet outages.
Always Connected Mode: In Always Connected mode, the Life Line feature is permanently active, meaning the PSTN line is always connected
to the phone connected to the FXS port. In this configuration, VoIP calls will not be allowed. This mode ensures that the device prioritizes the
traditional PSTN line for all communications and does not rely on VoIP services.
Always Disconnected Mode: In Always Disconnected mode, the Life Line feature is disabled, and the device will only allow users to make and
receive VoIP calls on the FXS port. PSTN calls via the FXS port will not be possible in this configuration. This mode is suitable for situations where
the user wants to use VoIP exclusively and does not require the fallback option of PSTN connectivity.
Model Lifeline Port Mapping
HT841
FXS FXO4
HT881
FXS FXO8
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