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Gliffy
imageAttachmentIdatt44466273
baseUrlhttps://webitel.atlassian.net/wiki
macroId31222d87-0ed1-4a2d-9df3-f8c8bacdaa87
nameWebitel Extended Architecture
diagramAttachmentIdatt44499030
containerId21304179
timestamp1707598588022

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ObjectSoftwareResources (min)ConnectivityDescription
1. Webitel Server

Debian 12 Linux 64bit - basic server installation with SSH connection;

Additionally, we will install:

Nginx; SSL; Webitel Services

  • 4 vCPU > 2,4 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 8Gb RAM
  • 80 GB, 2000 IOPS
  • 2 network interfaces >= 1 GbE
in-out: 80/tcp, 443/tcp

SSL certificates with a trusted CA are required to provide a secure connection via HTTPS protocol and telephony in a browser.

Scaling is possible.

2. PostgreSQL

Debian 12 Linux 64bit - basic server installation with SSH connection;

Additionally, we will install:

Linux; PostgreSQL 15; Grafana
  • 8 vCPU, > 2,6 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 16Gb RAM
  • 80 GB, 2000 IOPS
  • 500+ GB, 5000 IOPS
  • 1 network interface >= 1 GbE

PostgreSQL database server with configured Streaming Replication. 


3. MQ & Storage Server

Debian 12 Linux 64bit - basic server installation with SSH connection;

Additionally, we will install:

Linux; Redis Server; Consul; RabbitMQ; Webitel Storage
  • 4 vCPU, > 2,6 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 8Gb RAM
  • 120 GB, 2000 IOPS
  • 1 network interface >= 1 GbE

Application registration server, messaging service, and call recording storage.

The call records are stored in S3 storage.

4. OpenSIPS & rtpengine

Debian 12 Linux 64bit - basic server installation with SSH connection;

Additionally, we will install:

OpenSIPS 3.4, Rtpengine;
  • 8 vCPU > 2,6 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 16Gb RAM
  • 60 GB, 2000 IOPS
  • 2 network interfaces >= 1 GbE

5060/tcp, 5060/udp, 5061/tcp

in-out: 10000-50000/udp

Telephony server.

Scaling is possible.

5. FreeSWITCH

Debian 12 Linux 64bit - basic server installation with SSH connection;

Additionally, we will install:

FreeSWITCH; Webitel FlowManager;

  • 8 vCPU, > 2,6 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 16Gb RAM
  • 120 GB, 2000 IOPS
  • 1 network interface >= 1 GbE

Server for building voice applications.

When the load increases, it is necessary to duplicate the server.

Scaling is possible.

6. Homer & Grafana

Debian 12 Linux 64bit - basic server installation with SSH connection;

Additionally, we will install:

Homer + PostgreSQL, Grafana;
  • 4 vCPU, > 2,6 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 8Gb RAM
  • 200 GB, 2000 IOPS
  • 1 network interfaces >= 1 GbE

Grafana for analytics.

Collection of logs and call logs.

7.  Team

Microsoft Windows 11 / Linux 64bit

Google Chrome / Microsoft Edge (the latest or previous version)

  • 4 vCPU
  • 8Gb RAM
Connection to the IS not less than 2 Mb/s per user, with delays of no more than 15-20 ms.Employees’ workplace
8. Hardware SIP Phone

Connection to the IS not less than 5 Mb/s per device, with delays of no more than 15-20 ms.

in-out: 5060/udp, 10000-20000/udp

Hardware phone with SIP 2.0 protocol support

9. External Data Services


Integrations with external systems
10. PSTN


Public Switched Telephone Network is a general subscriber communication network, the access to which is provided by telephone sets, PBX, and data transmission equipment.



Connection speedDelay (Ping)JitterPacket Loss

WebRTC

  • For audio calls: at least 100–300 Kbps.
  • For video calls (standard quality): at least 1–2 Mbps.
  • For high-quality video (HD or Full HD): at least 2–4 Mbps.
  • For conferences or streams (4K video): 8–25 Mbps is recommended.
  • Optimal delay for WebRTC should be less than 50 ms.
  • Acceptable delay: 50-100 ms.
  • If delay exceeds 150 ms, noticeable delays during calls or video may occur.
  • Optimal jitter should be less than 30 ms. Jitter refers to variations in packet delay, and high jitter can significantly degrade audio or video quality.

  • Jitter over 50 ms can cause distortion or delays in audio/video.


  • Optimal packet loss for WebRTC: less than 1%.
  • Loss of up to 2-3% may be acceptable for audio, but it will degrade video quality.
  • Loss above 5% will significantly impair communication, causing noticeable interruptions, artifacts, or video 'freezes'.