00567pamaa2200169 4500 0000030448 20060608090000.0 047149903X 621.3822 EBE 2001 TK5103.483 EBE 2001 EBERSPACHER GSM : switching, services and protocols Jorg Eberspacher, Hans-Jorg Vogel and Christian Betstetter. Chichester: John Wiley & Sons, Ltd., 2001. xiv, 332p.: ill.; 24cm. Global system for mobile communications Vogel, Hans-Jorg BETSTTER, Christian