Nortel m3904 manual is related to Meridian series phone, m3904. Very similar device to this one is m3903. It has two programmable keys with the ability to assign lines to each one, or two features instead of lines. Second layer of keys is accessible by pressing the shift key. On top of programmable keys, there’s also four soft keys, sensitive to context. Main downside of this phone is that it lacks directory feature, although you may have the actual Directory/Log button on the phone, but it will not access the directory unfortunately. For some people this may be the biggest downside of the device, while it won’t bother the others. On the other hand, M3904 has six programmable keys, with the ability to assign two features on each one, with the ability to access the second layer by pressing the shift key. Unlike m3903, this model has four context sensitive soft keys. Because of that, some users will find this version as better solution if there’s a need for larger number of programmable keys. It just gives you more options and flexibility when it comes to everyday usage in busy environments like high-traffic offices, call operators, etc. In most situations, we link to official manufacturer website so you can be sure and 100% safe that you will not catch nasty malware. PDF files are easily exploited by this, so always download from safe sources. Nortel m3904 manual can be downloaded from Avaya’s official website if you click on this link: Download the user manual by clicking here.