Overview Product Description MMV3216C/56 - 16/32 - Port High Speed Multiplexer w/Integral 56K DSU/CSU (Refurbished) 90 Day Warranty Product Videos Custom Field Product Reviews Write a Review Write a Review × Multi-Tech MMV3216C/56 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *