Sometimes the temperature does not decrease with height in the troposphere, but increases. Such a situation is known as a temperature inversion. Temperature inversions limit or prevent the vertical mixing of air.
Middle range machines can cost on average $400 and are often multi-function with copier and laser printer capabilities. Finally, high-end machines which offer high speeds, high capacity and high resolution come at a higher price-expect to pay $1000 - $2500 for such a fax machine.
Sending the Fax. 1  1. Use your fax machine to send the fax. Once you have done everything listed above, you are ready to send your fax. 2  2. Use the internet to send a fax. It is also possible to use the internet to send materials to a fax machine. 3  3. Use email to send a fax.