Pick up the handset of a phone connected to an FXS port and dial *** to open the IVR. Then dial 02, and the device will announce its current IP address. This applies whether the unit is using DHCP, Static IP, or PPPoE mode.

Lifeline support ensures phone continuity during failures. If the HT813 loses power or loses SIP registration, it will automatically hard-relay the FXS port to the FXO port, which then allows the connected analog phone to directly use the PSTN line without configuration.

The HT841 and HT881 are FXO VoIP gateways designed to bridge traditional analog PSTN lines with IP-based phone systems. They convert PSTN calls to SIP and vice versa, enabling integration with IP PBXs, SIP servers, or direct IP calling scenarios. The only difference between them is the FXO port count: the HT841 provides 4 FXO ports, while the HT881 offers 8 FXO ports, making the HT881 suitable for environments needing more PSTN line capacity.

Yes. The GXW42xx (V2) includes:

• Over-voltage protection
• Surge immunity

This prevents damage from lightning or line surges on analog cabling, especially important when using long-distance wiring.