Ключевые слова: advice, appliance, assistance, background, base, blue, business, busy, call, classic, communicate, concept, connection, contact, conventional, cord, customer, desk, device, global, handset, help, helpdesk, helpline, hold, hook, information, landline, landline telephone, network, nobody, object, off, offline, on hold, personal, phone, receiver, removed, service, support, technology, telecommunication, telecommunications, telephone, unavailable, unreachable, wait, waiting, white,