Configuring ASUS Router for VentureTel VoIP

TL;DR

To configure an ASUS router for VentureTel VoIP, navigate to Advanced Settings > WAN > NAT Passthrough. Disable RTSP Passthrough and SIP Passthrough, then click Apply to save the changes. This configuration allows for proper VoIP functionality with VentureTel.

Navigate to Advanced Settings > WAN > NAT Passthrough.
Next to RTSP Passthrough, select Disable.
Next to SIP Passthrough, select Disable.
Click Apply.