CodeRED will not leave a message on an answering device. There are many different brands and types of capturing devices for leaving a message. Occasionally something about the answering device or the beep of the device causes the system to think it has reached a live person and begins playing the message. When the message is left, it only leaves part of the message. You may call 866-419-5000 to receive the entire message.
If the call rings once and hangs up and you have a ring back tone that plays a song the system will interpret this as an operator intercept and hang up.