Ключевые слова: bell, blower, business, buttons, buzz, call, caller, chat, communication, connecting, connection, contact, conversation, cordless, cradle, device, dial, dialing, dialphone, equipment, exchange, global, hand, hook, intercom, line, microphone, network, number, office, online, operator, phone, pulse, receiver, redial, ring, ringer, set, speaker, system, talk, technology, telephone, toll, tone, up, voice, worldwide,