On the official website of ZoiPer, in the download tab, select the version for Linux and click Download.
In the pop-up window, in the Free field, click Download.
After the download starts, you can close this window, it is no longer needed.
After the download and installation is complete, we are greeted by the softphone start window in which you need to select Continue as a Free user.
To continue, you will need a login and password for the internal line, this information can be obtained in the personal account of the UniTalk user in the “Users” tab.
The login is an internal number, and the password can be found by clicking on the “Show password” button.
We return to the softphone and enter the internal line number as a login and through @ the name of the SIP server cstat.nextel.com.uaor sip.nextel.cloud (as specified in the SIP line settings on the Users tab), you also need to enter a password, after which click on the Login button.
The next step ZoiPer will prompt you to specify a sip proxy or sip server, leave the default server and click the Next button.
Next, we DO NOT NEED to specify additional options, so uncheck the Optional checkbox if it was previously set and click Skip.
The next step ZoiPer will test the ability to connect using different protocols, in our case, SIP UDP is required, it should be highlighted in the checkbox and have the status (Found), if at this stage everything is fine, click Next, if not, return to the beginning and check the correctness of the login and password, perhaps a space was added somewhere.
At this stage, the softphone will offer to check the settings of the sound input / output system, if the user wishes, this can be done, but as a rule, it makes sense to skip this step.
In the program window that opens, if everything is fine, there should be a green checkmark next to the account name; it signals successful authorization on the server.