Top positive review
The Deep Sleep resolved.
Reviewed in the United States on March 14, 2015
This fax machine is excellent. However, the "deep sleep" mode problem is real. Pasting together several comments that appeared online, I learned the following. 1) The machine will spontaneously go into regular sleep mode when not in use. This saves energy. In regular sleep mode the machine will wake up and received faxes normally. So, that is good. 2) After a certain time (that you can set from the Ecology menu), left to its own devices, the machine will fall into "deep sleep" mode. This mode saves more power than regular sleep mode. However, the machine in deep sleep mode will only wake up and become able to receive faxes if: a) one physically touches a key, b) one lifts the handset, or c) if it received data from a computer or network. This will only happen if the fax machine is used as a printer, attached to a computer or a network. So, if one wants to use it as a stand-alone fax machine or one wants to receive faxes at all times, the deep sleep mode needs to be turned off. This is not an intuitive project.
To turn off the Deep Sleep mode you need to do the following: Press Menu. With the up and down arrows select 1. General Setup, press OK. Select 4. Ecology, press OK. Select 2. Sleep Time, press OK. Then, with the two-digit sleep time still on the screen, PRESS TOGETHER the LOW ARROW + START keys. The Deep Sleep menu will appear. You can then choose yes or no with the up and down arrows. Enter OK, then press Stop/Exit to exit the Manu mode.
As much as the deep sleep mode is ecologically friendly, it remains incomprehensible why Brother made the access to controlling the Deep Sleep mode so hidden and arcane.
The machine makes excellent copies and is a great printer. As to durability and cost of maintenance, remains to be seen.