A techno-buzzword for this arrangement is SCADA, “supervisory control and data acquisition.” The 6-bushing round can is typically a sectionalizing switch. Many out west are standalone, with local controls to “test” the line by a recloser, for often overhead-line faults are temporary; caused by lightening, tree or bird contact.
Earlier radio was single direction, in that the control room could transmit an open/close command with only indirect indication of switch operation—i.e., the neighborhood lights came on. More recent is fully duplex/bidirectional radio, so when a close command is sent, in a few seconds it sends back a confirmation from a mechanical auxiliary contact buried in the sectionalizer. If there is low-voltage AC closeby, {less than a few spans away} the switch auxiliary power is derived from that, but in more remote situations a local control-power transformer is installed.
It is expensive to install this type of switching, but if there is a history of temporary faults in an area, they are worth the money. Besides, having to get out in the middle of a windy night to manually operative a switch is not too “convenient.” Especially in bad weather, troublemen can be very opinionated about when and where the next one is needed.
