Overview Product Description 1202129L1 - TSU 120e - T1/FT1 DSU/CSU Multiplexer External (Refurbished) 90 Day Warranty Product Videos Custom Field Product Reviews Write a Review Write a Review × Adtran 1202129L1 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *