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The Concept Map you are trying to access has information related to:
tel RERC, telecommunication access RERC has developed guidelines, the essential audio and video characteristics of IP telecommunication needed to support lipreading, mainstream telecommunications manufacturers concerning accessibility, guidelines for mainstream telecommunications manufacturers, hearing aids with digital phones, the essential audio and video characteristics of IP telecommunication needed to support IP based speech, telecommunication access RERC defines the essential audio and video characteristics of IP telecommunication, text communication built in by mainstream telecommunications manufacturers, problems faced by users, the essential audio and video characteristics of IP telecommunication needed to support sign language