Telephones; circuit boards; telephone system equipment and components; namely, PBX, handsets, linecords, handset cords, cabinets, and power backup batteries; computer telephony software; telephone answering machines; telephone equipment, namely, radio telephones and transceivers

CONSTRUCTING, INSTALLING, REPARIRING AND MAINTAINING ELECTRONIC AUDIO AND VISUAL COMMUNICATION SYSTEMS, INCLUDING CLOSED CIRCUIT TELEVISION SYSTEMS, AIRLINE FLIGHT INFORMATION DISPLAY SYSTEMS FOR AIRPORTS, IN-HOUSE COMMUNICATIONS SYSTEMS, TELEPHONE AND WIRELESS PAGING SYSTEMS, AND IN-HOUSE VIDEO TAPE RECORDER SYSTEMS, BUT NOT INCLUDING SYSTEMS INCORPORATING FACSIMILE TRANSMISSION EQUIPMENT