According to LT1039 datasheet for specific pin V+ and V-, I assume these 2 pins are "input" that you can connect to external ±15V (±16V max) power supplies. Am I correct? Many other RS-232 devices have +V and V- pins as "output" only.

Could you please help to confirm these pins V+ and V- are "input only"? I need RS-232 that can fully swing ±15V for my application.

Thank you.