| Evaluation instructions |
Source |
| Hardware |
Input/controls |
Verify that user can turn microphone ON/OFF to intermix speech with TTY use. |
Section 255, Telecommunications Act [1193.51(d)] |
| Verify that product supports use of cross-manufacturer non-proprietary standard signals used by TTYs. |
Section 255, Telecommunications Act [1193.51(d)] |
| Verify that a standard non-acoustic connection point allowing voice communication is provided if a TTY is in use. |
Section 255, Telecommunications Act [1193.51(d)] |
| Output/displays |
Identify any lights that are used (LED or other stand-alone types of illumination). Determine when/if they flash or are steady. Verify that when lights are used as prominent visual indicators that a steady light represents a continuous condition and a flashing light indicates new conditions. |
|
| Verify that visual indicators of system status are placed within 30° of the user's normal line of vision. |
Section 255, Telecommunications Act [1193.43(d)(2)(c) Advisory Guidance] |
| Identify any use of flash, and measure the rate of flash. Verify that flash rate is between 3-10 flashes/sec with equal intervals of light and dark. |
|
| Identify text versions of auditory information. Verify that all text versions of auditory information are easily visible and preserved intact (all styles and exact timing and synchronization commands are maintained and there is zero introduction of errors or garbling of data; that is, message is either all numbers or the message is mixed numbers with text). |
Section 255, Telecommunications Act [1193.43(d)(2)(d) Advisory Guidance] |
| Determine whether flashing lights are used. If a flashing light is used to indicate different system modes, verify that no more than 3 different flash rates are used. |
|
| Manipulations |
Identify all auditory cues that are used. Verify that additional visual or tactile cues are used when auditory cues are used to attract a users attention to product alerts/messages. |
|
| If a built-in tactile cue is not readily achievable, verify that an auxiliary vibrating signaler has been provided (e.g., vibrating pager). |
Section 255, Telecommunications Act [1193.43(d)(2)(b), Advisory Guidance] |
| Software |
|
Verify that, if an automated voice response system is used, then an automated TTY response system is also used. |
Section 255, Telecommunications Act [1193.33(b)(2), Advisory Guidance] |
| Websites |
|
Verify that text transcriptions/descriptions for all audio output are provided. |
Section 255, Telecommunications Act [1193.33(17)(b), Advisory Guidance] |