May 26, 2018
excerpt from HylaFAX FAQ, http//www.hylafax.org/content/About_HylaFAX
HylaFAX is a facsimile system for UNIX systems. It supports o sending facsimile o receiving facsimile o polled retrieval of facsimile o transparent shared data use of the modem o sending messages to pagers Facsimile can be any size e.g. A4, B4, either 98 or 196 lpi, and transmitted/received as either 1D-encoded or 2D-encoded facsimile data 2D-encoded data is frequently more compact and hence takes a shorter time to communicate. Any modem that supports one of the standard interfaces for facsimile operation can be used; i.e. any Class 1, Class 2, or Class 2.0 modem.