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For an industrial environment with an average load of ap.100 thousand calls up to 400 thousand calls per day (250-350 simultaneous calls with call recording) and about 100 thousand chats per day, it is necessary to prepare 3 virtual machines, which are described in paragraphs 1-3 of the table below. You just need to install the operating system and leave Internet access to be able to download and install all additional software. After installation is complete, Internet access from virtual machines can be disabled. Access to the servers is provided to developers via SSH with the root user permissions for the time which is needed for the applications installation and testing. Virtual machines 1-3 should be able to operate on the same VLAN without filtering traffic by ports (allow all).

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ObjectSoftwareResources (min)ConnectivityDescription
1. Webitel Server

Debian 10 11 Linux 64bit - basic server installation with SSH connection;

Additionally, we will install:

OpenSIPS 3; rtpengine; nginx; SSL; webitel

  • 4 vCPU > 2,4 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 8Gb RAM
  • 120 GB, 20 IOPS, <10 ms
  • 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 / Cache Server / Storage Server

Debian 10 11 Linux 64bit - basic server installation with SSH connection;

Additionally, we will install:

Linux; PostgreSQL 1214; Grafana; Consul; RabbitMQ; Webitel Storage
  • 8 vCPU, > 2,6 GHz (Haswell generation or newer), No more than 2 virtual cores per 1 physical core
  • 16Gb RAM
  • 250+ GB, 100 IOPS, <8 ms
  • 1 TB, 10 IOPS, <10 мс (depends on quantity, duration and time of call recording storage)
  • 1 network interface >= 1 GbE



Database.

Call recording storage.

3. Media Gateway

Debian 10 11 Linux 64bit - basic server installation with SSH connection;

Additionally, we will install:

FreeSWITCH 10; 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, 20 IOPS, <8 ms
  • 1 network interface >= 1 GbE

Voice menu server.

4. External Data Services


Interaction with external systems runs via HTTP REST (needs to be discussed).
5.  Team

Microsoft Windows 10 / 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.