After almost 10 years spent in the Telco world I can remember that:
It had been cool to be a RF engineer, and have a deep knowledge of radio protocols and modulation. Then it had been cool to know about networking protocols to be on the edge of the WAP (missed) revolution. Then it had been cool to know everything about videotelephony and H.324 protocol for the (missed) video telco revolution. Then it had been cool to be a Java testing expert for the upcoming (missed) java app revolution. Then it had been cool to be a IMS expert to give origin to the (missed) IMS revolution with all its great services, commencing from push to talk.
Then it had been cool to present a deep knowledge on fixed and PSTN to commence the (partially missed) convergence Telco revolution. You could also choose in that period to be a Wi-Fi expert for the upcoming (missed) Wi-Fi and Wi-Max revolution. In that period. In the mean time it was cool to know everything about rich messaging and strange on screen banner broadcasting bullshit (ops, sorry about that!)
It has then been cool to be a LTE expert for the upcoming (?) LTE high datarate revolution, while now it’s really cool to be a mobile application expert for the Mobile 2.0 revolution.
It is me or cool experts have a bad influence on revolutions?