A dream with a telephone is some important form of communication, a form of guidance that you should take note of.
The dream may imply that you have communication issues with someone in your life or you are not fully understanding someone. There is need for discussion. It may also be a symbol of how you communicate with others, or what you would like to get across to someone.
If you fail to answer the telephone then it suggests that you feel overwhelmed, unsupported or are avoiding communication in some area of your life.
If the telephone call is muffled then it suggests you have trouble connecting with people or a person in your waking life.
If you leave a telephone message then it suggests that you are looking for help or support, or that you need to have a voice.