TDDs (telecommunication devices for the deaf) and emergency access.
Illinois Commerce Commission.
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DJ
Ellis
D003143:Communication Devices for People with Disabilities; D004631:Emergency Medical Service Communication Systems; D004632:Emergency Medical Services; D006297:Health Services Accessibility; D006311:Hearing Disorders; D006801:Humans; D012656:Self-Help Devices; D013064:Speech Disorders; D014481:United States