A frequency range with an upper limit of at least 7000Hz may not be guaranteed (requirement number 6.1 Voice bandwidth of UNE-EN 301549:2022).
– It may not be possible to provide a two-way communication mode via RTT (requirement number 6.2.1.1 Communication via RTT, of UNE-EN 301549:2022).
– It may not be possible to provide a two-way communication mode of voice and text simultaneously (requirement number 6.2.1.2 Simultaneous voice and text, of UNE-EN 301549:2022).
– It may not clearly differentiate sent text from received text in RTT communications [requirement number 6.2.2.1 Visually distinguishable display, of UNE-EN 301549:2022].

The RTT send and receive address may not be software determinable [requirement number 6.2.2.2.2 Software determinable send and receive address, of UNE-EN 301549:2022].
– RTT speaker identification may not be provided [requirement number 6.2.2.3 Speaker identification, of UNE-EN 301549:2022].
– There may not be an on-screen visual indicator of real-time audio activity [requirement number 6.2.2.4 Real-time audio with text visual indicator, of UNE-EN 301549:2022].
– It may not be able to ensure compatibility with other systems with RTT functionality [requirement number 6.2.3 Interoperability, of UNE-EN 301549:2022].

May not be able to guarantee that RTT input is transmitted to the network within 500ms [requirement number 6.2.4 RTT Responsiveness, of UNE-EN 301549:2022].
– An alternative to voice may not be provided to perform interactive assistance or response tasks [requirement number 6.4 Alternatives to voice-based services, of UNE-EN 301549:2022].
– A minimum resolution of QVGA may not be guaranteed for video functionalities [requirement number 6.5.2 Resolution, of UNE-EN 301549:2022].
– A minimum video frame rate of 20 FPS during communications may not be guaranteed (requirement number 6.5.3 Frame rate, of UNE-EN 301549:2022).
– The maximum time of 100ms between voice and video presentation to the user may not be exceeded [requirement number 6.5.4 Audio and video synchronisation, of UNE-EN 301549:2022].

There may not be a mode for speaker identification for sign language users in real time [requirement number 6.5.6 Speaker identification with video communication, of UNE-EN 301549:2022].
Criterion 7 – Video capability: Not applicable.
– There may be a video player that does not have a mode of operation to display existing subtitles [requirement number 7.1.1 Playback of subtitles, of UNE-EN 301549:2022].
– There may be a video player that does not have a mode of operation that allows synchronisation of audio with subtitles (requirement number 7.1.2 Subtitle synchronisation, of UNE-EN 301549:2022).
– There may be a video player that does not have a subtitle saving system [requirement number 7.1.3 Preservation of subtitles, of UNE-EN 301549:2022].

The user may not be able to adapt the subtitle characteristics to his individual requirements [requirement number 7.1.4 Subtitle characteristics, of UNE-EN 301549:2022].
– A mode of operation that provides a spoken output of the available subtitles may not be provided in all cases [requirement number 7.1.5 Spoken subtitles, of UNE-EN 301549:2022].
– There may be a player that does not have a mode to select and play available audio description [requirement number 7.2.1 Playback of audio description, of UNE-EN 301549:2022].
– There may be a player that does not have a way to synchronise available audio descriptions [requirement number 7.2.2 Synchronisation of audio description, of UNE-EN 301549:2022].

There may be a player that does not have a mode for saving available audio description [requirement number 7.2.3 Preservation of audio description, of UNE-EN 301549:2022].
– Some page incorporates a video player that does not provide controls for the playback of subtitles and audio description at the same level of interaction as the other controls [requirement number 7.3 User controls for subtitles and audio description, of UNE-EN 301549:2022].
Criterion 9 – Requirements applicable to web pages: Not applicable.
– There are non-textual contents that lack a textual alternative, or have an alternative that is not adequate [requirement number 9.1.1.1.1 Non-textual content, of UNE-EN 301549:2022].

Some recorded videos do not have text-based alternatives or audio alternative [requirement number 9.1.2.1 Audio only and video only, of UNE-EN 301549:2022].
– Some recorded video may not contain subtitles (requirement number 9.1.2.2.2 Subtitles (recorded), of UNE-EN 301549:2022).
– Some pre-recorded videos on the website do not have audio description or alternative means [requirement number 9.1.2.3 Audio description or alternative means, of UNE-EN 301549:2022].
– Some pre-recorded videos on the website do not have audio description or alternative means (requirement number 9.1.2.5 Audio description (recorded), of UNE-EN 301549:2022).
– On some pages the information, structure and relationships are not determined by software or have no alternative as text [requirement number 9.1.3.1 Information and relationships, of UNE-EN 301549:2022].

Some page does not have at least one correct reading sequence defined by program [requirement number 9.1.3.2 Meaningful sequence, of UNE-EN 301549:2022].
– Identification of elements only sensory characteristics such as shape, colour, size, visual location, orientation or sound [requirement number 9.1.3.3.3 Sensory characteristics, of UNE-EN 301549:2022].
– Content does not adapt when changing screen orientation [requirement number 9.1.3.4 Orientation, of UNE-EN 301549:2022].
– There are form elements in which the purpose of the input is not identified [requirement number 9.1.3.5 Identify the purpose of input, of UNE-EN 301549:2022].
– On some pages colour has been used as the only visual means to convey information, indicate an action, provoke a response or distinguish a visual element [requirement number 9.1.4.1 Use of colour, of UNE-EN 301549:2022].

There are elements of sound that play automatically and there is no mechanism to pause or stop it [requirement number 9.1.4.2 Audio control, of UNE-EN 301549:2022].
– On some pages the contrast ratio in text may not be at least 4.5:1 (requirement number 9.1.4.3 Contrast (minimum), of UNE-EN 301549:2022).
– There are errors on some pages related to text size and its customisability when zooming in [requirement number 9.1.4.4.4 Text resizing, of UNE-EN 301549:2022].
– There are clipart images based on text only [requirement number 9.1.4.5 Text images, of UNE-EN 301549:2022].
– Errors exist when customising font size, zoom level or text spacing [requirement number 9.1.4.10 Text Reset, of UNE-EN 301549:2022].
– Insufficient contrast in interface components or graphical objects [requirement number 9.1.4.11 Contrast of non-text content, of UNE-EN 301549:2022].

There is text that is not displayed correctly when line spacing and line heights are changed [requirement number 9.1.4.12 Text spacing, of UNE-EN 301549:2022].
– When an element receives the pointer or keyboard focus, additional content is displayed that cannot be dismissed without moving the pointer or changing the mouse focus [requirement number 9.1.4.13 Content with hover or focus, of UNE-EN 301549:2022].
– There are pages where keyboard navigation is not optimal and errors appear [requirement number 9.2.1.1.1 Keyboard, of UNE-EN 301549:2022].
– There are components that, when receiving the focus, prevent the user from moving to another focus using only the tab key or arrow keys [requirement number 9.2.1.2 No focus traps, of UNE-EN 301549:2022].
– There are keyboard shortcuts that do not work [requirement number 9.2.1.4 Shortcuts with character keys, of UNE-EN 301549:2022].
– There is a time limitation in place that cannot be stopped, adjusted or extended [requirement number 9.2.2.1 Adjustable time, of UNE-EN 301549:2022].

There may be some information in automatic motion that does not have controls to pause, control or hide [requirement number 9.2.2.2.2 Pause, stop and hide, of UNE-EN 301549:2022].
– There may be elements that flash more than three times in one second or above the general threshold [requirement number 9.2.3.1 Threshold of three flashes or less, of UNE-EN 301549:2022].
– On some pages there is no mechanism to omit blocks of content that are repeated on several pages [requirement number 9.2.4.1 Avoid blocks, of UNE-EN 301549:2022].
– Inadequate description of some of the titles of web pages [requirement number 9.2.4.2 Page titling, of UNE-EN 301549:2022].
– In some documents the sequential keyboard navigation may not have a consistent order [requirement number 9.2.4.3 Order of focus, of UNE-EN 301549:2022].

The purpose of links, headings or labels on the portal may not always be sufficiently descriptive or consistent for all users (requirement number 9.2.4.4 Purpose of links (in context), of UNE-EN 301549:2022).
– Links to related content pages or alternative ways of navigation are not always provided [requirement number 9.2.4.5 Multiple pathways, of UNE-EN 301549:2022].
– There are headings with repeated and/or non-descriptive text [requirement number 9.2.4.6 Headings and labels, of UNE-EN 301549:2022].
– The location of the focus is not always visible when navigating with a keyboard [requirement number 9.2.4.7 Visible focus, of UNE-EN 301549:2022].
– There are elements using multipoint or path-based that cannot be operated with only a pointer or without a path-based gesture [requirement number 9.2.5.1 Pointer gestures, of UNE-EN 301549:2022].
– There are pages where a mouse click event cannot be cancelled [requirement number 9.2.5.2 Pointer cancellation, of UNE-EN 301549:2022].
– There are interface components that do not have visible labels [requirement number 9.2.5.3 Name label, of UNE-EN 301549:2022].

There is functionality only operable by motion [requirement number 9.2.5.4 Activation by motion, of UNE-EN 301549:2022].
– Some pages do not indicate the default language used [requirement number 9.3.1.1 Language of the page, of UNE-EN 301549:2022].
– There may be occasional failures of editing and identification of the language in some parts of the web page [requirement number 9.3.1.2 Language of the parts, of UNE-EN 301549:2022].
– There are components that, when receiving the focus, initiate a context switch [requirement number 9.3.2.1 On receiving the focus, of UNE-EN 301549:2022].
– User interaction with a control causes page changes without prior warning [requirement number 9.3.2.2.2 When receiving input, of UNE-EN 301549:2022].

There may be pages with inconsistent navigation, due to different links to the same destination [requirement number 9.3.2.3 Consistent navigation, of UNE-EN 301549:2022].
– Certain interactive elements are not presented consistently in all cases, as they are displayed in different visual styles [requirement number 9.3.2.4 Consistent identification, of UNE-EN 301549:2022].
– There are error messages that are not very descriptive, or error messages that are not grouped into a single message, as well as a lack of suggestions in the form to fill in the fields correctly [requirement number 9.3.3.1.1 Identification of errors, of UNE-EN 301549:2022].
– There are forms with mandatory fields where the user is not informed of this, as well as fields where a textual example of the format of the field is missing [requirement number 9.3.3.2 Labels or instructions, of UNE-EN 301549:2022].
– There could be an input error in a field/form where the user is not notified of the suggestion to solve it [requirement number 9.3.3.3.3.3 Suggestions for errors 333, of UNE-EN 301549:2022].

The data entry does not detect errors and does not provide the user with an opportunity to correct them (requirement number 9.3.3.4 Error prevention (legal, financial, data), of UNE-EN 301549:2022).
– Errors may exist in the use of HTML and WAI-ARIA 1.1 tags and attributes [requirement number 9.4.1.1.1 Processing, of UNE-EN 301549:2022].
– On some pages user interface components such as form elements, links and script-generated components do not follow the structure recommended by the accessibility guidelines [requirement number 9.4.1.2 Name, function, value, of UNE-EN 301549:2022].
– On some pages status messages may not be determined programmatically through functions or properties [requirement number 9.4.1.3 Status messages, of UNE-EN 301549:2022].
– Some of the WCAG 2.1 requirements are not met [requirement number 9.6 Conformance requirements of WCAG guidelines, of UNE-EN 301549:2022].

In some documents the information, structure and relationships are not determined by software or do not have an alternative as text [requirement number 10.1.3.1 Information and relationships, of UNE-EN 301549:2022].
– Some documents do not have at least one correct reading sequence defined by software [requirement number 10.1.3.2 Meaningful sequence, of UNE-EN 301549:2022].
– There may be documents for which there is no accessible alternative with which to operate and understand the content [requirement number 10.1.3.3.3 Sensory characteristics, of UNE-EN 301549:2022].
– There may be documents whose content does not adapt when the orientation of the screen is changed [requirement number 10.1.3.4 Orientation, of UNE-EN 301549:2022].
– In some forms the input field that collects information about the user does not have the purpose identified [requirement number 10.1.3.5 Identify the purpose of input, of UNE-EN 301549:2022].
– In some documents, colour has been used as the only visual means to convey information, indicate an action, elicit a response or distinguish a visual element [requirement number 10.1.4.1 Use of colour, of UNE-EN 301549:2022].

There are audio elements in a document that play automatically and there is no mechanism to pause or stop it [requirement number 10.1.4.2 Audio control, of UNE-EN 301549:2022].
– In some documents the contrast ratio in text may not be at least 4.5:1 (requirement number 10.1.4.3 Contrast (minimum), of UNE-EN 301549:2022).
– In some texts the size cannot be changed by up to 200 percent without loss of content or functionality and in some documents the content may lose functionality or information when the content is enlarged [requirement number 10.1.4.4.4 Text resizing, of UNE-EN 301549:2022].

In some documents, images of text may have been used instead of text to convey information [requirement number 10.1.4.5 Images of text, of UNE-EN 301549:2022].
– In some documents the content may lose functionality or information when the content is expanded [requirement number 10.1.4.10 Resetting of text, of UNE-EN 301549:2022].
– In some documents the contrast of user interface components and graphical objects may not reach 3:1 with adjacent colours [requirement number 10.1.4.11 Contrast of non-text content, of UNE-EN 301549:2022].
– In some texts it is not possible to override the specified text spacing [requirement number 10.1.4.12 Text spacing, of UNE-EN 301549:2022].
– The content of some documents do not receive keyboard focus with which to perform any action [requirement number 10.1.4.13 Content with hover or focus, from UNE-EN 301549:2022].

There are documents in which it is not possible to operate entirely via the keyboard [requirement number 10.2.1.1 Keyboard, of UNE-EN 301549:2022].
– In some documents, headings have not been defined and keyboard navigation is not possible [requirement number 10.2.1.2 No focus traps, of UNE-EN 301549:2022].
– In some documents there are keyboard shortcuts that do not work [requirement number 10.2.1.4 Shortcuts with character keys, of UNE-EN 301549:2022].
– In some documents there is a time limitation that cannot be stopped, adjusted or extended [requirement number 10.2.2.1 Adjustable time, of UNE-EN 301549:2022].
– A document may contain information in automatic movement that does not have controls to pause, control or hide [requirement number 10.2.2.2.2 Pause, stop and hide, of UNE-EN 301549:2022].
– A document may contain elements that flash more than three times in one second or above the general threshold [requirement number 10.2.3.1 Threshold of three flashes or less, of UNE-EN 301549:2022].

There may be documents that do not have a title [requirement number 10.2.4.2 Page titling, of UNE-EN 301549:2022].
– In some documents, headings have not been defined and the keyboard cannot be navigated [requirement number 10.2.4.3 Focus order, of UNE-EN 301549:2022].
– A document may contain a link that may not have the specific purpose textually defined (requirement number 10.2.4.4.4 Purpose of links (in context), of UNE-EN 301549:2022).
– In some documents there may be a heading or a control name that is not sufficiently descriptive of its purpose [requirement number 10.2.4.6 Headings and labels, of UNE-EN 301549:2022].
– The location of the focus is not always visible when navigating with a keyboard through a document [requirement number 10.2.4.7 Visible focus, of UNE-EN 301549:2022].
– In some documents there may be elements using multipoint or path-based elements that cannot be operated with only a pointer or without a path-based gesture [requirement number 10.2.5.1 Pointer gestures, of UNE-EN 301549:2022].

There are documents where it is not possible to cancel an event by clicking the mouse [requirement number 10.2.5.2 Cancellation of the pointer, of UNE-EN 301549:2022].
– There are documents where some labels accompanying the controls do not have the same name [requirement number 10.2.5.3 Name label, of UNE-EN 301549:2022].
– There are documents whose functionality is only operable by movement [requirement number 10.2.5.4 Activation by movement, of UNE-EN 301549:2022].
– There may be documents where the main language is not identified [requirement number 10.3.1.1 Language of the page, of UNE-EN 301549:2022].
– There may be contents or phrases within some documents where the language cannot be determined by program [requirement number 10.3.2.1 Language of parts, of UNE-EN 301549:2022].

There may be components in a document that, when receiving the focus, initiate a change of context [requirement number 10.3.2.1 On receiving the focus, of UNE-EN 301549:2022].
– User interaction with a control causes page changes without prior warning [requirement number 10.3.2.2.2 When receiving input, of UNE-EN 301549:2022].
– There are data entry fields with automatic error detection capability that do not identify where or how the error occurs [requirement number 10.3.3.1 Error identification, of UNE-EN 301549:2022].
– In some form of a document, an automatic context switch may occur without warning the user [requirement number 10.3.3.2 Labels or instructions, of UNE-EN 301549:2022].
– In a document, there could be an input error in a field/form that the user is not notified of the suggestion to solve it [requirement number 10.3.3.3.3 Suggestions in case of errors, of UNE-EN 301549:2022].
– In a document there may be a form for data collection or a form that is legally or financially compromising that is not reversible, reviewable or has confirmation before submission (requirement number 10.3.3.4 Error prevention (legal, financial, data), of UNE-EN 301549:2022).

In some documents there may be duplicated attributes and IDs (requirement number 10.4.1.1.1 Processing, of UNE-EN 301549:2022).
– In some document user interface components such as form elements, links and script-generated components do not follow the structure recommended by the accessibility guidelines (requirement number 10.4.1.2 Name, function, value, of UNE-EN 301549:2022).
– In some documents status messages may not be determined programmatically through functions or properties [requirement number 10.4.1.3 Status messages, of UNE-EN 301549:2022].
Criterion 11 – Requirements applicable to software: Not applicable.
– The visual user preferences of the browser are not respected on the page [requirement number 11.7 User preferences, of UNE-EN 301549:2022].

The information required for accessibility may not be compatible with the format used for the output of the authoring tool [requirement number 11.8.1 Content management technology, of UNE-EN 301549:2022].
– There may be no mechanism to create content in an accessible form [requirement number 11.8.2 Creation of accessible content, of UNE-EN 301549:2022].
– There is no mechanism for preserving accessibility information during transformations [requirement number 11.8.3 Preservation of accessibility information during transformations, of UNE-EN 301549:2022].
– An accessibility checker repair mechanism may not be available [requirement number 11.8.4 Repair service, of UNE-EN 301549:2022].
– A template that supports content creation according to the requirements of chapter 9 (Web) or 10 (Non-web documents) may not be available (requirement number 11.8.5 Templates, of UNE-EN 301549:2022).