I don't know if we count as advanced, but our communications are moving towards light that's confined to fiber optic cables, and radio waves that are practically disguised as noise. We are making an ongoing effort to reduce the power level used by those communications. That doesn't seem promising for having someone detect us from a distance.

For inter-stellar communications of sufficient distance, some sort of massive object (i.e., a space ship) seems like the preferred method because it can go at almost the speed of light, but it doesn't spread out over distance, can make minor corrections to its course, visit multiple destinations, and do something such as return a message, learn about its surroundings, and so forth.

I'd guess that a civilization might go through a period where it is emitting lots of easy-to-detect radio signals, lasting maybe a century, so we have to catch them at just the right moment.