A flashing message-waiting icon and text message on your phone screen. The red light and message-waiting icon display only when you have a message on your primary line, even if you receive voice messages on other lines.
When you have a voice message, listen for:
A stutter tone from your handset, headset, or speakerphone when you place a call. The stutter tone is line-specific. You hear it only when using the line with the waiting message.