Telepathy is an ability to receive or transmit thoughts, read minds or basically manipulate others thoughts.
It is also linked to sensory perception and being able to channel your spirit guides or link to other telepaths,angels and those who have crossed over to the other side,animals of all kinds or just domesticated animals.
I would more so associate telepathy with psychokinesis allowing one to manipulate information on an atomic or sub-atomic level.
Thought being weight, mass, and having form.
There are a few different types of telepathy it merely depends on each indervidual and their perception and how they mentally communicate,either they recieve/transmit or do both.
Imagery, meditation in a relaxed quiet atmosphere, searching for your thought channel and opening it and also narrowing it ..which in turn can work both with you and for you, learn to open your thought channel fully and visualize this then start closing it little by little thus you are narrowing your percision , this will not happen overnight it could take days, weeks or even months to master.