Section 508 Reference Guide - 1194.25 Self-Contained, Closed Product Standards, In Other Words
1194.25(a) Usability without assistive technology: Self-contained products must be usable by people with disabilities. Products cannot require the attachment of AT for their use. Personal headsets for private listening do not fall under this standard; hence there is no conflict with 1194.25(e) below.
1194.25(b) Interactive system timeouts: Alert the user whenever a time-critical action is required on their part. The user must be given enough time to extend the response time.
1194.25(c) Redundancy for touch controls: An input method other than touch-responsive controls is required for devices using touchscreens or touch-operated (i.e., non-mechanic) controls. This provision does not prohibit the use of touchscreens and contact-sensitive controls, but requires a redundant set of controls that can be used by persons who have access problems with touch controls.
1194.25(d) Redundancy for biometric controls: If a system uses biometrics for identification (e.g., retinal scanning or fingerprint identification) or for system operation, the system must also provide a means of equivalent, alternative access independent of any particular biological feature (e.g., entering a password).
1194.25(e) Providing auditory output: If a product provides an audio output signal, it must meet specific requirements that allow for private listening.
1194.25(f) Mandatory volume control & reset: When a product has voice output and it will be used in a public area, it must have incremental volume control for the user to increase voice output above the ambient level. The product must be able to automatically reset the volume to its default level after every use.
1194.25(g) Supplement color coding: Color should never be the only means to identify functions, visual elements or information.
1194.25(h) Providing color selections: A variety of color selections and contrast levels should be provided when a product allows the user to change contrast or color settings. If the product does not feature adjustable color or contrast settings, then the standard does not apply.
1194.25(i) Avoid fast flashing/blinking: If a product includes one or more visual display screens, it should be designed so that flicker on the screens is nonexistent, or very slow (e.g., one flicker per second), or very fast (at least fifty-five flickers per second).
1194.25(j) When a product is intended to be a free-standing, permanent installation (e.g., an information kiosk), each operable control must be within reach.
(1) Vertical reference plane: Before verifying conformance to the reach ranges in standards (j)(2), (j)(3), and (j)(4) below, it is necessary to establish a reference plane for each control.
(2) Height of proximal controls: Each control that is proximal (within 10 inches of its reference plane) must be between 15 and 54 inches from the floor.
(3) Height of recessed controls: Each control that is recessed (farther than 10 inches from its reference plane, but within 24 inches) must be between 15 and 46 inches from the floor.
(4) Maximum depth of controls: Controls may not be recessed more than 24 inches.