> ## Documentation Index > Fetch the complete documentation index at: https://docs.orbit.devotel.io/llms.txt > Use this file to discover all available pages before exploring further. # Open source attribution > Required notices for the open source software Orbit by Devotel uses or redistributes # Open source attribution Orbit by Devotel is built on top of several open source projects. This page satisfies Apache-2 License §4 and similar redistribution-notice requirements for every OSS component shipped as part of the platform. The notices below are the minimum required by the upstream licenses. Full upstream `LICENSE` and `NOTICE` files are vendored alongside each component in the Orbit source tree and are NOT stripped or modified. *** ## Orbit Media **Upstream:** [`livekit/livekit`](https://github.com/livekit/livekit) — the LiveKit OSS Selective Forwarding Unit. **Upstream license:** Apache License 2.0. **What Orbit ships:** a Devotel fork (`@orbit/media-server`) deployed into our GKE cluster as the SFU media plane for multi-party voice, video rooms, and server-side recording. A matching browser SDK is published as [`@orbit/media-client`](https://www.npmjs.com/package/@orbit/media-client). **Required notice (Apache-2 §4):** > Copyright 2021–present LiveKit, Inc. > > Licensed under the Apache License, Version 2.0 (the "License"); you > may not use this file except in compliance with the License. You may > obtain a copy of the License at > > [http://www.apache.org/licenses/LICENSE-2.0](http://www.apache.org/licenses/LICENSE-2.0) > > Unless required by applicable law or agreed to in writing, software > distributed under the License is distributed on an "AS IS" BASIS, > WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or > implied. See the License for the specific language governing > permissions and limitations under the License. > > Portions of this work have been modified by Devotel for the Orbit > platform; modifications are tracked in the `@orbit/media-server` > repository changelog and remain Apache-2 licensed. *** ## drachtio **Upstream:** [`drachtio/drachtio-server`](https://github.com/drachtio/drachtio-server) — the SIP signaling server we run as the Orbit SBC alongside Jambonz. **Upstream license:** MIT License. **What Orbit ships:** unmodified `drachtio-server` builds packaged into our `sbc-sip` StatefulSet; configured via Jambonz and a thin Orbit-side wrapper. **Required notice (MIT):** > Copyright (c) Dave Horton and drachtio.org contributors. > > Permission is hereby granted, free of charge, to any person > obtaining a copy of this software and associated documentation files > (the "Software"), to deal in the Software without restriction, > including without limitation the rights to use, copy, modify, merge, > publish, distribute, sublicense, and/or sell copies of the Software, > and to permit persons to whom the Software is furnished to do so, > subject to the following conditions: > > The above copyright notice and this permission notice shall be > included in all copies or substantial portions of the Software. *** ## rtpengine **Upstream:** [`sipwise/rtpengine`](https://github.com/sipwise/rtpengine) — the RTP/SRTP media proxy we use for codec transcoding and NAT traversal on PSTN-to-SIP bridging. **Upstream license:** GNU General Public License v3 (GPLv3). **What Orbit ships:** unmodified `rtpengine` builds running as a sidecar to the SBC. Orbit does NOT link `rtpengine` source into any proprietary binary — it runs as a separate process with a documented NG control protocol, so the GPL boundary is preserved. **Required notice (GPLv3 §5):** > Copyright (C) 2010–present Sipwise GmbH. > > This program is free software: you can redistribute it and/or modify > it under the terms of the GNU General Public License as published by > the Free Software Foundation, either version 3 of the License, or > (at your option) any later version. > > This program is distributed in the hope that it will be useful, but > WITHOUT ANY WARRANTY; without even the implied warranty of > MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > General Public License for more details. *** ## Jambonz **Upstream:** [`jambonz/jambonz-feature-server`](https://github.com/jambonz/jambonz-feature-server) and the surrounding component family (`jambonz-api-server`, `sbc-sip-server`, etc.). **Upstream license:** MIT License. **What Orbit ships:** Jambonz running in our voice-edge GKE cluster as the call-control layer between the carrier and Orbit Media / AI agent runtimes. We add an Orbit-side helm chart and a few configuration overlays; no upstream source modifications are redistributed. **Required notice (MIT):** > Copyright (c) Dave Horton and the Jambonz contributors. > > Permission is hereby granted, free of charge, to any person > obtaining a copy of this software and associated documentation files > (the "Software"), to deal in the Software without restriction, > including without limitation the rights to use, copy, modify, merge, > publish, distribute, sublicense, and/or sell copies of the Software, > and to permit persons to whom the Software is furnished to do so, > subject to the following conditions: > > The above copyright notice and this permission notice shall be > included in all copies or substantial portions of the Software. *** ## coturn **Upstream:** [`coturn/coturn`](https://github.com/coturn/coturn) — TURN/STUN relay used by browser softphone clients behind symmetric NAT. **Upstream license:** BSD 3-Clause "New" or "Revised" License. **What Orbit ships:** unmodified `coturn` builds, deployed via the helm chart at `infrastructure/helm/coturn/`. **Required notice (BSD-3-Clause):** > Copyright (c) 2011, 2012, 2013 Citrix Systems and other contributors. > All rights reserved. > > Redistribution and use in source and binary forms, with or without > modification, are permitted provided that the following conditions > are met: > > 1. Redistributions of source code must retain the above copyright > notice, this list of conditions and the following disclaimer. > 2. Redistributions in binary form must reproduce the above copyright > notice, this list of conditions and the following disclaimer in > the documentation and/or other materials provided with the > distribution. > 3. Neither the name of the project nor the names of its > contributors may be used to endorse or promote products derived > from this software without specific prior written permission. > > THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS > "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES ARE DISCLAIMED. IN NO > EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY > DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL > DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE > GOODS OR SERVICES) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY. *** ## Reporting an attribution gap If you spot OSS code in any Orbit deliverable (npm package, container image, public asset, doc) whose upstream license is not honoured on this page, email `legal@devotel.io` with the upstream repo URL and the location in our distribution where it appears. We treat attribution gaps as P1 — they're fixed inside one business day and a corrected attribution shipped with the next release. The `infrastructure/runbooks/livekit-cloud-decom-checklist-2026-05-14.md` runbook is the operational cutover plan that retired our use of the hosted LiveKit Cloud service in favour of the in-house Orbit Media fork. The Apache-2 attribution above continues to apply to every release that ships the fork.