If you have any problems with Bitrix24 Telephony, please check the following requirements:
- 
	Internet connection speed - no less than 128 Kbps (Kilobits per second) for each conversation. 
- 
	Supported Internet browsers: - Google Chrome (recommended);
- Mozilla Firefox;
- Edge;
- Safari.
 Read more about supported browsers in the Voximplant Web SDK guide.We don't guarantee the correct functioning of Bitrix24 Telephony if you use any other browser. 
- 
	If you're using Bitrix24 Messenger for calls, it should be version 7 or newer. WebRTC technology uses HTTPS protocol. Thus, you need to get a trusted SSL certificate to make voice calls and video calls via Bitrix24 Messenger. A self-signed certificate may cause incorrect work. This applies to Bitrix24 Cloud version with own domain and Bitrix24 Self-hosted version. 
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	To make calls, you need a headset or configured SIP phone connected. 
- 
	If you use SIP phones and To everybody type of call distribution, incoming calls cannot be transferred to more than 10 phones (devices). This is Voximplant's limitation. 
- 
	Local network settings must be done. You can get a list of settings from Bitrix24 Support.
- 
	Voximplant supports G711 (u-law and a-law), Opus, ILBC, H.264, VP8 codecs. 
- 
	Call quality test Follow this link to test call quality: https://echo.voximplant.com/iframe.html This test helps you check: - Browser version;
- SDK Load;
- Access to the 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. 
- 
	Ad-blocking software used in your browser or antivirus can also block calls. Just add your Bitrix24 account address and the call quality test website to exceptions in this software. 
 
								  
 