Cisco 1900 is a series of routers from Cisco Systems. It is designed for small to medium-sized businesses and provides a wide range of features, including advanced security, voice, and wireless capabilities. The 1900 series is available in a variety of models, each with different features and capabilities. It is easy to set up and configure, making it an ideal choice for businesses that need a reliable and secure network. The 1900 series is also cost-effective, making it a great option for businesses on a budget.