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Adtran TSU 120 Multiplexer - Refurbished
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Adtran TSU 120 Multiplexer - Refurbished
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Adtran TSU 120 Multiplexer - Refurbished

SKU 149114 1200129L1 Refurbished (Grading Guide)
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Item Information

The TSU 120 and 120e are modular, full-featured T1/FT1 multiplexers designed to support a wide range of end-user applications. Equipped with both a synchronous V.35 DTE interface and a DSX-1 PBX port, the TSU 120/120e supports applications combining digital voice and high-speed data. 


  • Integrates T1 or DDS services into your network
  • Provides an interface between your data terminal equipment (DTE) and T1 or DDS circuits
  • Data rates up to 1.536 Mbps
  • Automatic protection switching
  • Integrated CSU/DSU
  • Diagnostic testing capabilities
  • Compatible with a wide range of DTE equipment
  • Easy installation and configuration
  • Compact size for use in small to medium-sized business environments


  • Adtran TSU 120 Multiplexer (1200129L1)


  • These items have been refurbished
  • Refurbished items have been cleaned, tested, and confirmed to be fully functional
  • These items may have minor blemishes on their housings which cannot be removed during the refurbishing process

TSU 120 Multiplexer Technical Specs

ModelTSU 120
Number of Ports3
Port TypeV.35 DTE
Port Speed-
Power Over Ethernet (PoE)No
Dimensions (WxDxH)17.2" x 10.6" x 1.75"

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Rest assured, if you order the wrong items, don't like the model, or just don't need it anymore we accept returns with NO restocking fees. Whether you want something different or just a credit, we have you covered! This policy goes hand in hand with our company culture of delivering outstanding customer satisfaction.

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  • Item(s) must be returned within 30 days from invoice date.
  • Item(s) must be received in original condition preferably in the same packing materials.
  • Item(s) should be securely packed for safe return.
  • The purchaser is responsible for all shipping costs and insurance.


  • Products usually ship within two business days after payment. If you have a rush order, or need an item delivered on Saturday please call to request faster shipping.
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