Amazon.com: 2-Port VoIP SIP Phone Adapter - GT202 Wireless Router, Supports WiFi Asterisk ATA VOS FXS Fax. Suitable for Home or Business (Black) : Office Products
Fax to email | T.38 VoIP fax support
Fax Adapters | US-Made VoIP FAX Adapter Products
Why T.38 Does Not Solve The FAX Problem - Vitelity, an Inteliquent Company