Softphone supports up to 10 (ten) custom buttons.
When user clicks on a custom button it is possible to do one of following actions:
- Open specific web-page in an external browser (for example, http://www.example.com/rates.html)
- Open local html file in an external browser (for example, local help file file:///C:/help.html)
- Start third-party application
- Show Settings dialog
- Show Login dialog
- Initiate outgoing call to specified number (for example, technical support number)
Position and picture for custom buttons are defined inside skin file (*.smf).
But action for custom buttons is specified in installer-brand.nsi file (see INFO*_URL).
Some of available skins have only one custom button defined. Others have more custom buttons.
You can define up to 10 (ten) custom button in a skin.

Each custom button should have unique ID (see below table).
| Button "Custom 1" | 50033 |
| Button "Custom 2" | 50035 |
| Button "Custom 3" | 50038 |
| Button "Custom 4" | 50039 |
| Button "Custom 5" | 50040 |
| Button "Custom 6" | 50041 |
| Button "Custom 7" | 50042 |
| Button "Custom 8" | 50043 |
| Button "Custom 9" | 50044 |
| Button "Custom 10" | 50045 |
All other properties have the same meaning as for regular button.