Your description reminds me of "The Terrornauts", a 1967 movie based on the novel "The Wailing Asteroid", by Murray Leinster. The story involves a group of characters who receive a radio signal from space. After they respond to the call, an alien ship appears and transports them to a deserted space station, where they are required as crew to repel an invasion by a different, hostile alien race. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjE5azA5_r6AhVwTDABHUhXAB4QFnoECCAQAQ&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FThe_Terrornauts&usg=AOvVaw0ELQnxrgWqJ29cU6RA4gbL

Your description reminds me of "The Terrornauts", a 1967 movie based on the novel "The Wailing Asteroid", by Murray Leinster. The story involves a group of characters who receive a radio signal from space. After they respond to the call, an alien ship appears and transports them to a deserted space station, where they are required as crew to repel an invasion by a different, hostile alien race.