One of the most important buttons on any fax or multipurpose machines is the "Cancel" button. Yet on my Dell E525w printer I cannot get the Cancel button on the device to cancel any sending fax at anytime during the cycle after choosing "Send". The result, multiple calls to non-fax numbers, in my case 3, after a 60 second wait time. While the printer seems to be able to detect busy signal and RNA (ring no answer) and properly re-call the number for the set number of times, most faxes I've used cannot detect an answer by an answering machine, voicemail, or live person; therefore a quick, easy and effective way to cancel any such fax is critical.
Canceling of a scan, when using the document feeder can save a lot of time, and canceling a large print job misprinting or printing many more pages than desired are important functions, the ability to cancel a "fax gone wrong" is critical to ensure multiple unanswerable calls are placed to the wrong number, resulting calls to perplexed folks at the answering side.
I've noticed that using the Cancel button during a print job takes at least 2-3 seconds to actually work, a UI design issue, but I can live with that, as well as the unlit display area (except the non-touch display screen). Please advise if manufacturing defect, working as designed, or other way to cancel a sending fax. Turning the machine off, including at the same time disconnecting the phone line are not effective (and are ridiculously complex and arcane) - the machine just attempts to resend when it's back on and reconnected.