Spec Sheet Preview: ADA compliant speaker phones (Meets all requirements of ADA, ASME A17 and B44 Codes for elevator emergency phones) Designed for 120VAC or 24VAC/DC power Requires analog telephone line either POTS, PBX or central office phone lines. If used on a VoIP system, you must purchase a model# ABL-VOIP VoIP Interface Device. If you have one from the VoIP provider, have them program it with a standard WINK or disconnect signal per FCC and CRTC requirements External power drives built-in phone consolidator and line detection complian …