system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] How come the crew are able to determine no response to a hail so quickly?

I was watching Star Trek Voyager, and one thing that I noticed was that whenever Janeway asks Kim to hail another ship, he almost instantly says there is no response. Like come on, shouldn't he give a few seconds for the other ship to decide to answer their hail?

Whenever Voyager gets hailed, Janeway takes a couple of seconds to accept a hail. I just think this is a bit weird.
gpt
I seem to recall that "opening hailing frequencies" is something they had to actually do before talking. It's possible that the instant response is because the ship they're hailing has not opened these frequencies, and so they have no ability to receive the message. 

Or maybe it goes straight to voicemail.