5.1. Closed functionality
There is currently no content classified with this term.
ICT has closed functionality for many reasons, including design or policy. Some of the functionality of products can be closed because the product is self-contained and users are precluded from adding peripherals or software in order to access that functionality.
ICT may have closed functionality in practice even though the ICT was not designed, developed or supplied to be closed.
Computers that do not allow end-users to adjust settings or install software are functionally closed.
5.1.2.1. Closed functionality
Where ICT has closed functionality, it shall meet the requirements set out in clauses 5.2 to 13, as applicable.
5.1.2.2. Assistive Technology
Where ICT has closed functionality, that closed functionality shall be operable without requiring the user to attach, connect or install assistive technology and shall conform to the generic requirements of clauses 5.1.3 to 5.1.7 as applicable. Personal headsets and induction loops shall not be classed as assistive technology for the purpose of this clause.
5.1.3.1. General
Where visual information is needed to enable the use of those functions of ICT that are closed to assistive technologies for screen reading, ICT shall provide at least one mode of operation using non-visual access to enable the use of those functions.
5.1.3.2. Auditory output delivery including speech
Where auditory output is provided as non-visual access to closed functionality, the auditory output shall be delivered:
- either directly by a mechanism included in or provided with the ICT;
- or by a personal headset that can be connected through a 3,5 mm audio jack, or an industry standard connection, without requiring the use of vision
5.1.3.3. Auditory output correlation
Where auditory output is provided as non-visual access to closed functionality, and where information is displayed on the screen, the ICT should provide auditory information that allows the user to correlate the audio with the information displayed on the screen.
5.1.3.4. Speech output user control
Where speech output is provided as non-visual access to closed functionality, the speech output shall be capable of being interrupted and repeated when requested by the user, where permitted by security requirements.
5.1.3.5. Speech output automatic interruption
Where speech output is provided as non-visual access to closed functionality, the ICT shall interrupt current speech output when a user action occurs and when new speech output begins.
5.1.3.6. Speech output for non-text content
Where ICT presents non-text content, the alternative for non-text content shall be presented to users via speech output unless the non-text content is pure decoration or is used only for visual formatting. The speech output for non-text content shall follow the guidance for "text alternative" described in WCAG 2.0 [4] Success Criterion 1.1.1.
5.1.3.7. Speech output for video information
Where pre-recorded video content is needed to enable the use of closed functions of ICTand where speech output is provided as non-visual access to closed functionality, the speech output shall present equivalent information for the pre-recorded video content.
5.1.3.8. Masked entry
<p>Where auditory output is provided as non-visual access to closed functionality, and the characters displayed are masking characters, the auditory output shall not be a spoken version of the characters entered unless the auditory output is known to be delivered only to a mechanism for private listening, or the user explicitly chooses to allow non-private auditory output.</p>
5.1.3.9. Private access to personal data
Where auditory output is provided as non-visual access to closed functionality, and the output contains data that is considered to be private according to the applicable privacy policy, the corresponding auditory output shall only be delivered through a mechanism for private listening that can be connected without requiring the use of vision, or through any other mechanism explicitly chosen by the user.
5.1.3.10. Non-interfering audio output
Where auditory output is provided as non-visual access to closed functionality, the ICTshall not automatically play, at the same time, any interfering audible output that lasts longer than three seconds.
5.1.3.11. Private listening volume
Where auditory output is provided as non-visual access to closed functionality and is delivered through a mechanism for private listening, ICT shall provide at least one non-visual mode of operation for controlling the volume.
5.1.3.12. Speaker volume
Where auditory output is provided as non-visual access to closed functionality and is delivered through speakers on ICT, a non-visual incremental volume control shall be provided with output amplification up to a level of at least 65 dBA (-29 dBPaA).
5.1.3.13. Volume reset
Where auditory output is provided as non-visual access to closed functionality, a function that resets the volume to be at a level of 65 dBA or less after every use, shall be provided, unless the ICT is dedicated to a single user.
5.1.3.14. Spoken languages
Where speech output is provided as non-visual access to closed functionality, speech output shall be in the same human language as the displayed content provided, except:
a) for proper names, technical terms, words of indeterminate language, and words or phrases that have become part of the vernacular of the immediately surrounding text;
b) where the content is generated externally and not under the control of the ICT vendor, clause 5.1.3.14 shall not be required to apply for languages not supported by the ICT's speech synthesizer;
c) for displayed languages that cannot be selected using non-visual access;
d) where the user explicitly selects a speech language that is different from the language of the displayed content.
5.1.3.15. Non-visual error identification
Where speech output is provided as non-visual access to closed functionality and an input error is automatically detected, speech output shall identify and describe the item that is in error.
5.1.3.16. Receipts, tickets, and transactional outputs
Where ICT is closed to visual access and provides receipts, tickets or other outputs as a result of a self-service transaction, speech output shall be provided which shall include all information necessary to complete or verify the transaction. In the case of ticketing machines, printed copies of itineraries and maps shall not be required to be audible.
Where any functionality of ICT is closed to the text enlargement features of platform or assistive technology, the ICT shall provide a mode of operation where the text and images of text necessary for all functionality is displayed in such a way that a non-accented capital "H" subtends an angle of at least 0,7 degrees at a viewing distance specified by the supplier.
The subtended angle, in degrees, may be calculated from:
Ψ = (180 x 60 x H) / (π x D)
Where:
- ψ is the subtended angle
- H is the height of the text
- D is the viewing distance.
- D and H are expressed in the same units
Where pre-recorded auditory information is needed to enable the use of closed functions of ICT, the ICT shall provide visual information that is equivalent to the pre-recorded auditory output.
5.1.6.1. Closed functionality
Where ICT functionality is closed to keyboards or keyboard interfaces, all functionality shall be operable without vision as required by clause 5.1.3.
5.1.6.2. Input focus
Where ICT functionality is closed to keyboards or keyboard interfaces and where input focus can be moved to a user interface element, it shall be possible to move the input focus away from that element using the same mechanism, in order to avoid trapping the input focus.