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The Rainbow app is a cloud-based UC service (UCaaS) that makes additional collaboration services available to users,
regardless of their existing communications systems.
As an overlay solution, Rainbow brings rich feature capabilities, like contact management, presence, chat, audio/video call,
screen and file sharing. And it's simple to deploy: users can download and install it in a single click at www.openrainbow.com
First one, called Video Collaboration, is collaboration oriented (IM, sharing, audio, video)
with a reduced capacity of participants (up to 10).
The second one, called Audio Conference, supports a large capacity of participants (up to 100).
1. The organization of the conference:
2. he way to access it:
Ad-Hoc video conferences managed directly by Rainbow servers thanks to SFU routing services (Bridge).
Ad-hoc conferences are established through a bubble.
1. SFU doesn’t process the video media but rather routes it to everyone who needs it
2. Each client sends its video media to the SFU, which then forwards that media to all other participants who decided to display it.
3. Client sends one video flows and receive several flows (up to 4 with Rainbow).
4. Client can instruct SFU which streams to send.
5. High throughput on server side (SFU).
6. Low latency.
Comparison of different media flows with a 5 participants conference (and a capability of 4 displays)
To avoid transcoding, a single codec for audio and a single codec for video are supported.
Rainbow WebRTC conference rely on the following codecs:
The matrix below provides typical bandwidth per media
Let’s have an example for a Video Collaboration session with 8 participants.
Main graphical aspects of a video conference through a bubble
Audio conference is accessible thanks to a scheduled invitation only.
Audio mixing is done through a MCU (Multipoint Control Unit) provided by a third-party solution (Partner is Pgi)
From the user interface each participant can:
Added to the previous capabilities, organizer (or owner) of the meeting can:
Through the PSTN network
Possibility to choice between Dial-in or Dial-out
Dial-out accessible through a web interface for Rainbow users and guests
Multi-language voice prompt greeting for Dial-in accesses (See next slide)
1. Telecom Regulation Compliancy : in providing an Audio Conference service,
ALE has to be declared as ‘operator’ in most of the countries where the service is sold.
2. Currently ALE is compliant in 44 countries in term of Country Regulation and soon 6 more.
3. Business Partners have to check in their respective country if they have something to do to be compliant with their local Telecom Regulation.
Main graphical aspects to create an audio conference
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