In this catalog we have tried to group all the systems that have been designed by De Lorenzo for the study of telecommunications in order to provide our customers with a wide choice to suit their specific needs. The laboratory is divided into four broad categories:
• Basic Telecommunications
• ICT
• Transmission Systems
• Telephony
COMMUNICATION PROTOCOLS: HDLC, SDLC, X.25, FRAME RELAY, ATM DL TC72 
LOCAL AREA NETWORK (LAN) AND INTRANET DL TC74
WIDE AREA NETWORK (WAN) AND INTERNET DL TC75
VOICE OVER IP (VOIP) DL TC77
WIRELESS LAN (WLAN) DL TC78
NETWORK TECHNOLOGY TRAINING PACKAGE DL NTP001