Telephone calls from a specific person, living or dead, implies a telepathic message from that person.
If the person is living, the dreamer should hear from him or her within a very short time.
If the dreamer is making a phone call, she wants to tell someone something but is holding back out of fear.
A telephone that is not being used indicates that the dreamer is holding back from making a contact that needs to be made.
Astrological parallel: Mercury/Uranus combinations Tarot parallel: The suit of wands