didww-voice-agent/NOTICE at main · edwinux/didww-voice-agent · GitHub

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didww-voice-agent
Copyright (c) 2026 didww-voice-agent contributors

This project is licensed under the MIT License (see LICENSE).

================================================================================
Third-party components
================================================================================

didww-voice-agent orchestrates the following components as SEPARATE processes
(Docker containers or npm packages). They are not modified or statically linked
into this project; each is governed by its own license.

  drachtio-server   SIP server, run as a Docker container.
                    https://github.com/drachtio/drachtio-server
  rtpengine         RTP/SRTP media proxy and transcoder, run as a Docker
                    container. Licensed GPL-2.0.
                    https://github.com/sipwise/rtpengine
  Caddy             TLS reverse proxy. Licensed Apache-2.0.
  Node.js packages  See server/package.json. Each dependency carries its own
                    license (drachtio-srf, @google/genai, ws, express,
                    sdp-transform, dotenv, express-rate-limit,
                    @alexanderolsen/libsamplerate-js).

================================================================================
Bundled source
================================================================================

  server/g722.js    An ITU-T G.722 codec ported to JavaScript from the
                    public-domain SpanDSP / CMU reference implementation.

================================================================================
Patent-encumbered codecs (OPTIONAL)
================================================================================

provision/rtpengine-evs/Dockerfile builds an rtpengine image with 3GPP EVS
support. The EVS reference source (3GPP TS 26.443) is DOWNLOADED AT BUILD TIME
from 3gpp.org and is NOT redistributed in this repository.

EVS, AMR-NB and AMR-WB are patent-encumbered codecs. Building or operating a
gateway that transcodes them may require patent licenses in your jurisdiction;
this is the operator's responsibility. None of these codecs are required — a
G.711 (PCMU) deployment uses none of them, and the stock rtpengine image avoids
EVS entirely.

================================================================================

This project is not affiliated with or endorsed by DIDWW, Google or Meta.
Product and company names are referenced only to describe interoperability.