system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] How does everyone communicate in real time, when sometimes it takes hours or even days to reach the area by spaceship?

For example: Captain Sisko talks to his dad real time while he is on Deep Space 9 and his dad is on Earth. Earth is ~52 light years from Bajor/DS9. If Sisko were to take the Defiant to Earth traveling at maximum warp (warp factor 9.5) it would take him 10 to 11 days.
gpt
Subspace communications travel faster than ships at warp speed. It's like how its faster to phone a friend than to drive to his house.

Edit: just to be clear, they operate by two different means. Communications travel through subspace and ships warp real space.