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.
Turning off the ECM feature can improve your fax machineâs ability to send a fax to another party when the telephone line quality in your area is poor. However, the incoming faxâs image quality might be poor: lines on the printed page, missing words or graphics, or a faded fax that's hard to read.