How are the feature/DN keys numbered on my Nortel IP set?
On IP Phone 2004 sets, there are 3 keys on each side of the display screen. Starting from lower right and counting upward, they are numbered 1, 2 and 3. On the left side and counting upward, they are numbered 4, 5 and 6. After you press the UP arrow key (located below the display screen), the keys on the right are (from bottom up), 1, 7 and 8 and on the right, 9, 10 and 11. Pressing the UP arrow key again, the right side now has keys (from bottom up) 1, 12 and 13; the left side has keys (from bottom up) 14.