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Click the 
button at the top of the block to open the archive of calls. A list of calls made earlier opens (Fig.4) with information about the duration of the call, the start time of the call, and the call buttons; when clicked, a call is made to the chosen number. More about working with calls can be found here.
Fig. 4. Central block - archive
The system user User list opens (Fig.5) when clicking the 
button.
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