I believe the SA-100 is extension of the Shoretel system, although I am not familiar with it.
More details are going to be necessary to assist with this... Types of phones, if other, known working phones work on these ports or if these phones work on other known good ports, if the switch has been reboot, patch cords or cable runs tested, etc.
I am going to move this to what I believe is a more appropriate discussion area.