Ключевые слова: access, administration, agency, answer, background, black, broadband, business, busy, button, call, center, company, computer, control, customer, desk, dial, engineer, fair, global, headset, helpdesk, helpline, hotline, immediate, ip, landline, machine, modern, operator, phone, provider, question, reception, response, sale, service, solution, speaker, station, system, talk, technology, telecommunication, telephone, telephony, training, voice, voip,