Ключевые слова: answer, background, black, business, call, center, communicate, communication, connection, contact, customer, desk, dial, dialing, hand, handset, headset, hold, human, ip, ip phone, line, man, number, object, office, operator, pbx, person, phone, pick, receiver, retro, service, support, talk, technology, telecommunication, telemarketing, telephone, up, white, work,