I was at a standstill in my career, then I read a book. It was written about 500 BC. Nothing has changed in business or in war. "The Art of War" by Sun Tzu has been issued many times and renamed many times. This book is also used in many MBA programs. Go to Project Gutenberg (gutenberg.org) and search for the Art Of War (click on the link for a version on this site), download the original translation by Lionel Giles done in 1910 with his comments.
You are NOT reading this to learn how to fight war, but how to conduct business meetings and how to outsmart the other guy in business. If you change War to Business and Enemy to Vendor or .... well you get the idea. Just as you should never go into war without a Plan B, you should never go into a business meeting without a Plan B. I often went into meetings with several sets of paper work or designs. When the time came, all of a sudden, I had the right solution, the wrong ones were kept hidden and destroyed after the meeting.
In the Introduction Mr. Giles explains how the troops were brought into line. We do not behead people (well not in the English speaking world), but sometimes drastic action is necessary. The applications of this book in management are many. Tempered with the reading of the Hawthorn Experiments listed on the Bosses page, you will make a great leader.
There are many books on business. Read some of them.
I would add more, but this is a telephone site.
For those that might want to be a Telecommunications Engineer, I do not have any advice. I have no training in Telecommunications, so I do not know what to tell you. I am also a functional MBA/Business person without any training. I learned it all on my own (modesty is not one of my outstanding points) and that is how I managed to do it all. The few people I have respect for those in the field, Jim P... and Mike C.... also learned it on their own. I also gave freely of that knowledge when I was working, if someone had a problem or a question, they could come to me for answers.
In any career, it is not what you learn in College, but what you know. College only teaches you advanced readin, writin and rithmetic. That may, with luck, get you in the door. If you are serious about Telecommunications, read all the State and Federal Tariffs. Then get every book on Telephony (like the old ones written in the '20s and '30's), on VOIP and everything in between. Read a book or two on Basic Electronics. Oh, you also need to know how to use, Microsoft Office, Excel, Project, Visio and other related products.
It all depends on you, not what you learn in school!