Annie Oakley - "Annie and The First Phone" (1956)
While surveying the route for the first telephone line intended to link remote ranches with the Diablo phone company spot a burning ranch house and arrive at the neighboring homestead in time to drive off the attack.
Annie discovers that a crooked businessman has convinced the Indians to burn out the small ranchers so he can buy their land for next to nothing and turn a huge profit reselling the acreage when the Indian troubles suddenly cease.
Director: George Archainbaud
Writer: Warren Wilson (teleplay)
Stars: Gail Davis, Jimmy Hawkins, Brad Johnson
https://www.imdb.com/title/tt0513438/?ref_=fn_al_tt_1