Ключевые слова: abstract, analog, background, booth, branch, busy, cable, camera, cctv, complicated concept, confused, control system, danger, design, difficult, electrical wires, engineering, failure, fiber optic cable, hard, house, hub, inside, ip camera, lan, landline phone, line, mixed, old, open, pabx, pattern, pbx, private automatic branch exchange, private branch exchange, problem, public, road, security, solutions, street, system, telecom box, telecommunication, telephone booth, terrible, texture, traditional, wire and cable, wires,