Ключевые слова: answer, background, business, buttons, buzz, call, callcenter, caller, calling, chat, close, communicate, communication, connection, contact, contacting, conversation, cord, dial, helpdesk, hold, intercom, isolated, keypad, message, mic, number, office, phone, phonecall, phoning, port, pulse, receive, receiver, redial, ring, ringing, speak, speaker, support, talk, technical, technology, telecom, telecommunications telephone, tone, volume, white,