RFC 2422 · PROPOSED STANDARD · 1998
SUN · 14 JUN 2026
Toll Quality Voice - 32 kbit/s ADPCM MIME Sub-type Registration
Overview
RFC 2422, “Toll Quality Voice - 32 kbit/s ADPCM MIME Sub-type Registration”, is a Proposed Standard document published in September 1998 by G. Vaudreuil, G. Parsons. It obsoletes RFC 1911. It has been obsoleted by RFC 3802 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
This document describes the registration of the MIME sub-type audio/32KADPCM for toll quality audio. [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 2422 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 1998
- RFC 2421 Voice Profile for Internet Mail - version 2
- RFC 2423 VPIM Voice Message MIME Sub-type Registration
- RFC 2420 The PPP Triple-DES Encryption Protocol
- RFC 2424 Content Duration MIME Header Definition
- RFC 2419 The PPP DES Encryption Protocol, Version 2
- RFC 2425 A MIME Content-Type for Directory Information
- RFC 2418 IETF Working Group Guidelines and Procedures
- RFC 2426 vCard MIME Directory Profile