1. Download application.
After the installation open the «Mode & Audio Quality» tab. In the Communication Device section select "Use microphone and speakers". In the Quality / Bandwidth section select "Use default settings (Recommended)". Click "Next"
2. Select your hardware from the Sound Record Device options list in the Microphone Connection and Record Volume section. Leave the Audio Input Channel as default. Click "Next".
3. Select your hardware from the Sound Play Device options list in the Soundcard and Playback Volume section. Click "Next".
4. Right click with your mouse on line 1 and select "Configure Line"
5. Enter the following settings:
Full 'Friendly' Display Name: 111111
Server (SIP Proxy or Virtual PBX): sip.zadarma.com
SIP Number (or User Name): Your sip number (for example 111111) from your personal account
Password: Your sip number password from your personal account
Full 'Friendly' Display Name: 111111
Server (SIP Proxy or Virtual PBX): pbx.zadarma.com
SIP Number (or User Name): Your PBX extension number (for example 1234-100) from your personal account
Password: Your PBX extension number password from your personal account
6. Softphone is set.