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http://www.rfc-editor.org/rfc/rfc2422.txt
RFC 2422: Toll Quality Voice - 32 kbit/s ADPCM MIME Sub-type Registration, G. Vaudreuil, G. Parsons
1998-09-01T23:00:00-00:00
This document describes the registration of the MIME sub-type audio/32KADPCM for toll quality audio. [STANDARDS-TRACK]