Overview Reviews Product Description The VIPER 3900 AC2600 Dual-Band MU-MIMO Gigabit VDSL2/ ADSL2+ Modem Router is a versatile, high-performance router. It provides all the functions that a home or small office needs to establish a high-speed connection to the Internet. Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × D-Link D-Link DSL-3900 Modem Router Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments