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.
Some fax machines will also print out a short confirmation report. Here's how to receive a fax: 1  Make sure the fax machine is plugged in, powered on and connected to a working phone jack. 2  This phone jack can either be your regular phone line or a dedicated fax line.3  The important thing is that the sender has the right number.ome fax machines will also print out a short confirmation report. Here's how to receive a fax: 1  Make sure the fax machine is plugged in, powered on and connected to a working phone jack. 2  This phone jack can either be your regular phone line or a dedicated fax line.