Telephone IP relay service for hearing or speech impaired: How it works
6 free internet-based telephone relay services if you have trouble hearing - EatSpeakThink.com
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CRTC TNC 2017-33 Docs: TTY & IP Relay Services // Services de relais IP et ATS – Deaf Wireless Canada Committee
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How to Make a Relay Call
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Video relay service - Wikipedia
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TELUS IP Relay by viiz Communications Canada, Inc.
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Services | Sprint Accessibility
