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� Home : ITU-T : Publications : Recommendations : F�Series : F.921
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F.921�:�Audio-based indoor and outdoor network navigation system for persons with vision impairment �

Recommendation F.921

In force components
Number
 Title Status
F.921 (08/18)
� 		Audio-based indoor and outdoor network navigation system for persons with vision impairment � In force
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Superseded and Withdrawn components
Number
 Title Status
F.921 (03/17)
� 		Audio-based network navigation system for persons with vision impairment � Superseded

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