ITU-T-F.921 › Historical Revision Information
Audio-based network navigation system for persons with vision impairment

ITU-T-F.921 - 2017 EDITION - SUPERSEDED
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Audio-based network navigation system for persons with vision impairment


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Document Number

ITU-T-F.921

Revision Level

2017 EDITION

Status

Superseded

Publication Date

March 1, 2017