The GNU project's fax system

Comprehensive listing of fax server manufacturers and suppliers.

Offers a number of useful tools for calculating and sizing trunk groups. The ERLANG B calculator can also be used to size fax servers for incoming calls, derived from how many pages you receive in the peak hour. To use this for fax Simply divide the number of pages you receive in the peak hour by 80 and enter this number in the BHT field.

Comprehensive listing of Fax servers and gateways for Windows NT.