Section 508 Reference Guide - 1194.23 Telecommunications Product Standards, In Other Words
1194.23(a) TTY function / compatibility: Telecommunication products (e.g., telephones) or systems that provide voice communication must also have the capability to provide standard non-acoustic connection points for TTY. Microphones must be capable of being turned on and off to allow user to intermix speech with TTY use.
1194.23(b) TTY signal protocols: Voice telecommunication products must support commonly used protocols such as 45.5 baud Baudot and 300 baud ASCII.
1194.23(c) Interactive system usability: Automated telecommunication services (e.g. voice mailboxes) must support TTY interaction.
1194.23(d) Interactive system timeouts: The user should be alerted when any time-dependent function is about to timeout. The user must be given enough time to extend the response time.
1194.23(e) Telecommunications functions: Caller identification and similar functions of a telecommunication device must be accessible to TTY users and those who cannot see the device's display.
1194.23(f) Mandatory volume control: Telecommunications products that transmit voice communications must have the ability to amplify the volume and have an intermediary setting.
1194.23(g) Automatic volume reset: On telecommunication products that have adjustable volume, there must be an automatic volume reset function that sets the volume back to the default level. Assume that this standard refers to products that have a handset, headset, earphone, or other transducer near the ear. Assume that the default volume level is safe, clear, and audible for fully able users.
1194.23(h) Magnetic wireless coupling: When using a telecommunication product such as a telephone, there must be a means to effectively use magnetic wireless coupling devices such as hearing aids. Assume that effective magnetic wireless coupling to hearing aids with a telecoil and cochlear implants is applicable to this requirement.
1194.23(i) Hearing technology interference: Interference to hearing technologies (e.g., hearing aids, cochlear implants, assistive listening systems) should be reduced to the lowest possible level.
1194.23(j) Transmission of information: Any telecommunication product must have the ability to process information in a usable format. Products shall not remove information required for access. This requirement applies to the transmission of TTY signals over voice-based telecommunications systems, including VoIP. The requirement was written broadly to ensure that it would apply to evolving technologies.
1194.23(k)(1) Tactilely discernible controls: The controls and keys on a telecommunication product must be designed and manufactured so that a user may locate and identify them by means of touch alone, without activating them.
1194.23(k)(2) Operability of controls: Mechanically operated controls must be usable with one hand, without particular motions (twisting of the wrist, tight grasping, pinching) or considerable exertion (more than five pounds of force).
1194.23(k)(3) Adjustable key repeat rate: Telecommunications products with key repeat features must allow a two-second delay before repeating a key being held down. Products with key repeat features must also allow up to two seconds between each repetition of a key being held down.
1194.23(k)(4) Discernible status of controls: All locking or toggle controls or keys must be discernible visually, and through touch or sound.