I had a faculty member who I recently converted to a 7962 from his Nortel M7208 and he was upset to find out that just like the Nortel M7208 the 7962 was not activating the t-coils in his hearing aids. After some searching on the internet I found that many modern headsets do not have enough static magnitism to activate the auto t-coils in modern hearing aids. After testing this by taping a hard drive magnet to the faculty members headset (which worked ;-) ) I bought some small cylinder magnets from Amazon and epoxyed one to the ear cup on the headset. The additional more powerful magnet activated the magnetic reed switch in his hearing aids and then the t-coils picked up the signal from the headset like a champ. Here are some background links I found on the problem.
http://www.sandman.com/hearingaid.html
http://www.oticonusa.com/Oticon/Professional_Resources/Library/News_From_Oticon_/T_Coils__Beyond_the_Telephone.html
And the magnets I bought that corrected the issue:
http://www.amazon.com/Magcraft-NSN0802-2-Inch-Magnets-14-Count/dp/B000YF92PA
Hope this helps someone else out.
