<p><img decoding="async" class='wp-post-image' style='float:left;margin-right:10px;' src="https://i5tech.files.wordpress.com/2012/10/telephone-histoire2.png" width="526px" alt="modern technology"/></p> <p>In our case, it helped us identify a defective timer on an air-conditioning unit that powered up on a Saturday and again down on a Sunday. As the workplace is unoccupied over the weekend we had been oblivious to this glitch but...