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imageAttachmentIdatt29163543
baseUrlhttps://webitel.atlassian.net/wiki
macroIdc3d01061-e3f2-4271-b616-c9ee1705bec7
nameWebitel Basic
diagramAttachmentIdatt29098001
containerId21300561
timestamp1706613532452

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ObjectSoftwareResources (min)ConnectivityDescription
1. Telephony application server

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

Additionally, we will install:

OpenSIPS 3.4; rtpengine; nginx; SSL; 

  • 4 vCPU > 2,6 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 8Gb RAM
  • 60 GB, 1000 IOPS, 
  • 1 network interface >= 1 GbE

in-out: 80/tcp, 443/tcp, 5060/tcp, 5060/udp

in-out: 10000-50000/udp

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


2. Database Server

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

Additionally, we will install:

Linux; PostgreSQL 15; Grafana; Consul; RabbitMQ; 
  • 8 vCPU, > 2,8 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 16Gb RAM
  • 60 GB, 1000 IOPS
  • 250 GB, 2000 IOPS
  • 1 network interface >= 1 GbE



  • Database.
  • Microservice registration service.
  • Messaging bus.

We recommend duplicating the server to configure Streaming Replica.

3. Application Server

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

Additionally, we will install:

FreeSWITCH 10; Webitel FlowManager; Webitel App; Webitel API GW; Storage; CallCenter; Engine; Messages
  • 8 vCPU, > 2,6 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 16Gb RAM
  • 80 GB, 1000 IOPS
  • 1 TB, 200 IOPS, <10 мс (if S3 is not used)
  • 1 network interface >= 1 GbE

  • Applications server.
  • Server for creating voice menus.
  • Storage of conversation recordings.
4. External Data Services


Interaction with external systems runs via HTTP REST.
5.  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
6. 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
7. 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'.