I'm not Nortel either but the power supply part number may help more then the trunk card. The only reason I would think a 24 v supply may connect to a 66 block with trunk lines would be for external paging like Valcom. Your going to have to explain what type of equipment you have as was stated if your trunk card has lights then its working. Your best choice would be to click here and find some professional help call


Merritt

Business Telephones & Equipment + Commercial Audio/Video Products
Commercial Communications . . . Turner, Maine
If it was built after 1980 don't expect it to work right.