Actually after personal experiance and reading I am not sure if I recommend the T7406. Out of the 3 T7406 I installed 2 of the sites have had problems, 3rd one I havn't heared from them in years, perhaps they ditched me cause of it! I had to ask the users of the other 2 sites to reset, unplug, don't use, however the handsets seem to recover, before I make it buy.
I am guessing it may be to early to tell if the new T7406E is more stable and reliable than the T7406. Perhaps I should recommend the analog solution with ATA's! Myself as well as the users do like the full intergration.
I am interested in the stability of this new version. If anyone has installed these please post how long problem free service they have got so far. Comments are welcome. Thanks