Thanks!
One more question. The integration instructions say that you can choose to create a Lead in CRM. I checked all the boxes as written in the instructions. I see an appeal to Bitrix in the logs. However, the Lead is not being created. I read somewhere on the Internet that you need to manually click the "create lead" button in the 3cx web application, but I don't have such a button. Or did I get it all wrong?

Have you tried configuring the Web Client to call using smartphone?What if I'm not taking a call on a softphone? it's just that when accepting a call on a SIP-DECT handset, this window immediately closes and it turns out that it is impossible to create a Lead.

Domain in the Bitrix integration in the 3CX console...Add "https://" to the Domain field.View attachment 51353
View attachment 51355
in the settings, the domain is specified as in the instructions. However, the link shows the content bitrix24.com
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.