HUNTSVILLE, Ala.--(BUSINESS WIRE)--ADTRAN®, Inc., (NASDAQ: ADTN), a leading provider of next-generation networking solutions, today announced the integration of a captive portal and wireless video delivery into the ADTRAN Gigabit service architecture. Service providers are now able to drastically reduce the time of adding new broadband and business subscribers from hours to minutes. With demand for Gigabit broadband outpacing service providers’ ability to ramp up services in their respective co