voice guide
The music instead leaves the caller with too many doubts. One presses 1 and waits - nothing happens so we press again etc... and before we know it an AP is answering. Replacing the 8 bit music with an audio guide like the former is important (especially for those who chain call, you have to actively remember that you need to press 1 (when focused on preparing for content of the call) because the music being long in any case, after a few calls one is used to having to wait listening to the music and forgets the 1 pressing step