https://app.knowbase.one/vault/rfc/docid/4161
RFC3802: Toll Quality Voice - 32 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM) MIME Sub-type Registration
Network Working Group G. Vaudreuil Request for Comments: 3802 Lucent Technologies Obsoletes: 2422 G. Parsons Category: Standards Track Nortel Networks ...