 
Avaya 120A5 CSU Module (Channel Service Unit)
Like New: $89.00
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)
Compatibility
- 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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