Main page


Tech requirements for Telephony module


If you have any problems with Bitrix24 Telephony, please check the following requirements:

  1. Internet connection speed - no less than 128 Kbps (Kilobits per second) for each conversation.
  2. Recommended Internet browsers:
    • Mozilla Firefox version 27 and newer;
    • Google Chrome version 29 and newer;
    • other browsers based on Chrome version 29 and newer (e.g., Opera Next).
  3. If you're using Bitrix24 desktop app for calls, it should be version 4 or newer.
    WebRTC technology uses https protocol. Thus, you need to get trusted SSL certificate to make voice calls and video calls via desktop app. Self-signed certificate may cause incorrect work. This applies to Bitrix24 Cloud version with own domain and Bitrix24 Self-hosted version.
  4. Local network settings.
    You need to open:
    • Ports:
      443 TCP, 1935 TCP, 5060 TCP, 1935 UDP, 5060 UDP, 19350-19360 UDP, 8000-48000 UDP.
    • Bitrix24 servers addresses:,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

    • Voximplant addresses:,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
  5. Voximplant supports g.711, opus, speex wb codecs.
  6. Call quality test.
  7. Follow this link to test call quality:

    This test helps you check:

    • Browser version;
    • SDK Load;
    • Access to microphone;
    • Authorization;
    • Connection quality.

    If any problems are found during the test, you will be offered possible solutions. Then you can start this test again to make sure everything works fine.

This helped Thanks :) This didn't help Sorry :(
Could you please tell us why:
It's not what I'm looking for
It's too complicated

Did not find an answer to your question?

Send your question to the Bitrix24Care team
Access to technical support specialists requires commercial plan subscription and is not available to free account users. Free accounts are limited to self-support resources such as product manuals, helpdesk articles, video tutorials, and free webinars. Technical assistance, training, setup, customization and other value added services can also be purchased directly from local Bitrix24 partners