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Send2Fax, LLC: Fax Over IP Solutions
Allows users to send and receive faxes with any internet-connected computer. Toll-free fax number at no extra charge. As little as $1.95/month.
Fax Over IP: Launch Fax
Fax Broadcast, Fax to Email, Desktop Faxing and Opt-in Email Services. Send your broadcast from your desktop onto our servers.
Data On Call: Fax over IP (FoIP) Services
Offers a complete suite of Internet & email fax services: Desktop faxing for users, XML-based APIs for developers, fax broadcasts, and fax on demand.
IETF Internet Fax Working Group
Describes the IETF's Fax working group and includes contact and mailing list information, working and background documents, meeting minutes, and links to other organizations working on similiar topics.
Request for Comments document for the File Format for Internet Fax.
FaxFreedom: Fax Over IP
Send and receive faxes without a fax machine from any computer. Archive and email faxes, and administer your account from a personal control panel.
eFax: Fax over IP
Internet faxing solutions include fax by email capability with any web connection. Free trial.
Protus IP Solutions: Fax over IP (FoIP)
Offers web-based IP fax services that allows users to send and receive faxes from email and the Web.
RingCentral: Internet Fax
Offers Internet fax. Receive & broadcast fax via internet. Get a Local area number, never busy. Feature loaded with voicemail, virtual PBX, FindMe.
MaxEmail: Fax Over IP (FoIP)
Provider of fax to email, email to fax, voice mail and fax broadcast services. Individual and corporate packages available.