Junk fax unlawful to send an individual an unsolicited sales and marketing fax without any prior consent of the customer. If the fax receiver is a company or corporate instances, fax communications are permitted unless the subscriber has previously notified the caller that such communications should not be sent on that line; or the subscriber’s line is listed in the register kept under regulation 25 of PECR. This register is maintained on behalf of OFCOM by the Direct Marketing Association and is branded as the Facsimile Preference Service (“FPS”). Unsolicited faxes are regulated by the Canadian Radio-television and Telecommunications Commission (CRTC) and
Fax to the e-mail to fax service that still uses fax modems at least one way. Computer modems are often designated by a particular fax class, which indicates how much processing is offloaded from the computer's CPU to the fax modem. Several different telephone line modulation techniques are used by fax machines. They are negotiated during the fax-modem handshake, and the fax devices will use the highest data rate that both fax devices support, usually a minimum of 14.4 kbit/s for Group 3 fax. Note that "Super Group 3" faxes use V.34bis modulation that allows a data rate of up to