How to block manual calls from soft phone

Hi,
I'm using Vicidial 2.0.5 and I'm willing to block manual calls to be placed from soft phones.
I'm using SJPhone 1.6 and I did not found any option to block calls from being placed by agent.
I want all calls to be performed and managed by Vicidial and let no option to an agent to place call by hand using installed soft phone.
Thanks for your help
I'm using Vicidial 2.0.5 and I'm willing to block manual calls to be placed from soft phones.
I'm using SJPhone 1.6 and I did not found any option to block calls from being placed by agent.
I want all calls to be performed and managed by Vicidial and let no option to an agent to place call by hand using installed soft phone.
Thanks for your help