Basic eLearning courses are completely free. These training courses include about 12-20 voice automated Slides.

Basic eLearning Training Videos

SS7 Fundamentals	Telecom Fundamentals	UMTS Fundamentals
Introduction to GSM	Sigtran Fundamentals	LTE-SAE *New
Introduction to Femto	Wimax	UMA
Introduction to SIP	RTP/RTCP Fundamentals	Learn about GPRS