From John Taylor & Associates:
Snappy Fax Super G3 Edition can simultaneously send and receive multiple faxes using inexpensive fax modems, no expensive dedicated fax boards are required. Typical faxes are transmitted at maximum speeds of 14,400 bits per second (referred to as baud rate). An average page of text will take about 45 to 60 seconds to transmit. With Super G3 fax, speeds of up to 33,600 bits per second are possible yielding a reduction in transmission time of 50 or more. We say 50 but that would be at a speed of 28,800 bps, the session speed is actually negotiated between the sender and receiver so the session speed may be as high as 33,600 bps. Super G3 also includes error correction which will increase the reliability of fax transmissions over less than perfect phone line conditions.