The caller ID recognition does not work almost at all, in communication with the technical department the information was that there is a problem with some providers in caller ID recognition, which is not true because for the same person it can sometimes display the number and sometimes not. Our experience after 2 months of use is that regardless of the provider of the person calling us, the caller ID recognition does not work almost at all.
Also, when we answer a call, for a minimum amount of time, there continues to be a ringing sound during the conversation, as if the line has not yet been opened and the person who called hears the ringing sound instead of our answer.

Simple analog telephone center. Naturally VFM... The only bad things are with the caller ID recognition that doesn't work properly / always, with VoIP lines (above the Modem)