Overview Product Description 6456524700020 -DDS/MR64 - 64 kbps DSU/CSU RS232/V.35 External (Refurbished) 90 Day Warranty Product Videos Custom Field Product Reviews Write a Review Write a Review × Motorola 6456524700020 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *