if you want to learn telecommunications, go for a good book .. like Digital Communications for Sklar for example, learn what it is .. and then u will find urself biased to some specific fields of telecommunications .. then, u can ask for exercises
Telecommunications is a very wide area and can be divided into:
1. Digital Communications (text by Proakis, Sklar)
2. Networks (Texts by Ferouzan, Stallings, etc)
3. Wireless Comm. (Text by Rappaport)
4. RF Antennas (??)