Check out the links shown below for some information on speaker phones and headsets. Faxes can be handled at least two ways. A fax modem board in a PC will receive and send faxes, however the only way to get a hard copy is to print the fax on the printer. And there is no way to input hard copy for faxing without the use of a scanner, which negates any savings from not buying a fax machine. However, if a scanner is needed anyway, then this method is a pretty good solution.
Fax machines are available everywhere today at resonable prices.
Brother is a very popular brand name that we have had good results from. Plain paper is better but costs significantly more. It is important to consider though, that a plain paper fax doubles pretty well for a copier. This is not true of thermal paper machines. Although they will make copies, the thermal paper is only useable in house.