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Avaya 120A5 CSU Module (Channel Service Unit)

Certified Refurbished: $89.00
This product is eligible for 2 Year Platinum Protection!

Avaya 120A5 Features

  • In combination with a DS1 circuit pack, it provides the essential functions of external CSUs
  • Small size, easier to install than external CSU
  • Does not require any option switch settings or DS1 cable
  • Vintage 2 provides enhancements to support the payload loopback function available when the ESF framing format is selected (requires 700A loopback jack)


  • The 120A2 CSU Module is compatible with the following DS1 circuit packs:
    • TN464E to TN464HP
    • TN2464CP and earlier
    • TN767D or TN767E
    • TN2313 or TN2313AP
  • Supported on Definity, Multivantage, and Communication Manager servers that support TN circuit packs

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