Make any phone an IP phone: Convert analog phones to digital IP phones - easily and benefit from the sustainable and cost-effective solution that allows you to retain existing phones, streamline management and faxing. No ethernet, Wi-Fi enables VoIP access without ethernet. Wi-Fi via USB: With a WiFi USB adapter, sold separately, you can access Wi-Fi for VoIP even when ethernet isn't available, keeping your communication flowing smoothly in any situation. Communication platforms: The Poly ATA 400 works with your existing infrastructure. The Poly ATA is Zoom certified and Microsoft supported through Microsoft Teams SIP Gateway.