I found a phone on the map that, when clicking on the context menu and pressing the right mouse button, a menu is displayed where it says "delete", and so on.
As I remember, triggers have that, don't they?
And when trying to capture a physical cannon, the beam "lags behind", which also suggests thoughts. Moreover, the second phone nearby does not have such a feature.
To move to that place, enter sv_cheats 1 and "setpos 1986.844604 794.005249 -39.968758" into the console while on the map.