Specifications
The following table presents the main system specifications
| Characteristic | Value | Unit of measurement |
| Minimum network speed required for one video channel | 128 | kbps |
| Minimum network speed required for one audio channel | 10 | kbps |
| Maximum number of users connected to one server | 1000+ (*) | Pc |
| Maximum number of simultaneous video calls | 100+ (**) | Pc |
| Maximum number of participants in one conference | 30+ (***) | Pc |
| Maximum number of simultaneous conferences on one server | 3+ (****) | Pc |
| Minimum video channel resolution | 160x120 (SubQVGA) | Width x Height of points |
| Maximum video channel resolution | 4096x3112 (UltraHD/4K) | Width x Height of points |
| Audio channel sampling rate | 48 | кГц |
| Audio channel operating frequency range | 0-24000 | Гц |
| Default video codec | VP8 | |
| Default audio codec | Opus | |
| Channel of audio / video streaming | SRTP (RFC 3550) | |
| Control channel | WebSocket over HTTP(s) |
** - determined by network bandwidth.
*** - is determined by the performance of the server hardware, network bandwidth and the power of client PCs.
**** - determined by the performance of the server hardware and network bandwidth.
Network and hardware requirements
The system works according to the following principle - AV streams from each participant are sent separately to each client device via the server, which acts as a traffic multiplier. Thus, each participant transmits to the server one AV stream (its own) and receives N AV streams, where N is the number of participants in the conference.
The minimum requirements for the outgoing communication channel of each participant is 160 kbps. To ensure SD quality, an outgoing channel of 384 kbps is required, for HD 864 - kbps, for FullHD - 1152 kbps. Channel inbound bandwidth must be at least N * (outbound bandwidth), where N is the number of participants in a video conference.
Server network requirements - incoming channel: N * (outgoing bandwidth of the participant), outgoing channel: N * N * (outgoing bandwidth of the participant), where N is the number of participants in a video conference.
The system works reliably with losses in communication channels up to 5%, retains speech connectivity with losses up to 10%.
The table below presents the approximate hardware and network requirements depending on the number of users and quality.
| Number of participants | Quality | Server network bandwidth | Client network bandwidth | Server hardware requirements | Client hardware requirements |
| 2 | SD | In: 760 kbps Out: 760 kbps |
In: 380 kbps Out: 380 kbps |
CPU is not worse Intel Atom E6xx, 512 Mb RAM | CPU is not worse Intel Atom E6xx, 512 Mb RAM |
| 2 | HQ | In: 1024 kbps Out: 1024 kbps |
In: 512 kbps Out: 512 kbps |
CPU is not worse Intel Atom E6xx, 1024 Mb RAM | CPU is not worse Intel Atom E6xx, 1024 Mb RAM |
| 2 | HD | In: 2048 kbps Out: 2048 kbps |
In: 1024 kbps Out: 1024 kbps |
CPU is not worse Intel Atom E6xx, 1024 Mb RAM | CPU is not worse Intel Celeron 2GHz, 1024 Mb RAM |
| 8 | SD | In: 3 mbps Out: 24 mbps |
In: 3 mbps Out: 380 kbps |
CPU is not worse Intel Celeron 2GHz, 1024 Mb RAM | CPU is not worse Intel Celeron 2GHz, 2048 Mb RAM |
| 8 | HQ | In: 4 mbps Out: 32 mbps |
In: 4 mbps Out: 512 kbps |
CPU is not worse Intel Celeron 2GHz, 1024 Mb RAM | CPU is not worse Intel Core 2 Duo, 2048 Mb RAM |
| 8 | HD | In: 8 mbps Out: 64 mbps |
In: 8 mbps Out: 1024 kbps |
CPU is not worse Intel Celeron 2GHz, 2048 Mb RAM | CPU is not worse Intel Core i3, 4096 Mb RAM |
| 16 | SD | In: 6 mbps Out: 48 mbps |
In: 6 mbps Out: 380 kbps |
CPU is not worse Intel Celeron 2GHz, 2048 Mb RAM | CPU is not worse Intel Core 2 Duo, 4096 Mb RAM |
| 16 | HQ | In: 8 mbps Out: 64 mbps |
In: 8 mbps Out: 512 kbps |
CPU is not worse Intel Celeron 2GHz, 4096 Mb RAM | CPU is not worse Intel Core i3, 4096 Mb RAM |
| 16 | HD | In: 16 mbps Out: 128 mbps |
In: 16 mbps Out: 1024 kbps |
CPU is not worse Intel Core 2 Duo, 4096 Mb RAM | CPU is not worse Intel Core i5, 8192 Mb RAM |
| 32 | SD | In: 12 mbps Out: 96 mbps |
In: 12 mbps Out: 380 kbps |
CPU is not worse Intel Core 2 Duo, 4096 Mb RAM | CPU is not worse Intel Core i3, 8192 Mb RAM |
| 32 | HQ | In: 16 mbps Out: 128 mbps |
In: 16 mbps Out: 512 kbps |
CPU is not worse Intel Core i3, 4096 Mb RAM | CPU is not worse Intel Core i5, 8192 Mb RAM |
| 32 | HD | In: 32 mbps Out: 256 mbps |
In: 32 mbps Out: 1024 kbps |
CPU is not worse Intel Core i5, 8192 Mb RAM | CPU is not worse Intel Core i7, 8192 Mb RAM |
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