Sergey,
The SC_AGENT_TIMEOUT parameter is configured within the configuration file.
Technically this is on the server side.
You can either directly edit the parameter in the configuration file, or you can use the GUI.
If using the GUI, log in, select a profile then a configuration file, and click the agent tab.
You'll see a value in that section that says: Timeout (secs)
Adjust the Timeout value, then click save and reload.
Hope this helps!
John