Difference between the two Comdial 7700 phones

Comdial redesigned the Comdial Digitech and did not change the model number. This makes everything very confusing. Here are pictures of the two different phones with the same model number.

7700fb_circles.jpg (18380 bytes) 7700fb_old_circles.jpg (14863 bytes)
7700 New style: It has 10 line buttons down bottom with the ITCM and HOLD buttons. It also has a volume up and down button and 3 buttons just below the LCD 7700 Old style: It has only 3 line buttons down bottom with the ITCM and HOLD buttons. It has a volume slider knob in the middle if the keypad area and no butons under the LCD