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Stock  YES
Manuf. Part#  120A2-R
Special Offer    - ONE YEAR WARRANTY  
Your Price:  ONLY $495.00

  • The 120A channel service unit (CSU) module connects to either a TN464E/F or a TN767D/E DS1 circuit pack on 1 end. The other end connects to the network interface smart jack. The 120A is powered from the +5 VDC port carrier power supply and uses a maximum of 1.2 Watts.
  • In combination with the DS1 circuit pack, it provides the essential functions of external CSUs. The TN464/767 and switch administration support all framing and line coding options.
  • The 120A is small, a little larger than a wallet, is easier to install than an external CSU, and does not require any option switch settings or DS1 cable.
  • Vintage 2 of the 120A CSU module (the 120A2) provides enhancements to support the payload loopback function available when the ESF framing format is selected.
  • This 700A loopback jack is controlled from the network side using the data link provided by the ESF framing format. This provides a loopback of data back to the network and operates as defined in AT&T TR54016-1989.
  • Includes Clip and Cable.

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