Overview Product Description 48522 - 2160-R/M - 56 kbps DSU/CSU 6-Port TDM Rackmount (Refurbished) 90 Day Warranty Product Videos Custom Field Product Reviews Write a Review Write a Review × Codex 48522 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *