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Avaya 120A4 CSU Module (Channel Service Unit)

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Avaya 120A4 CSU Module Channel Service Unit

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 and higher provide enhancements to support the payload loopback function available when the ESF framing format is selected (requires 700A loopback jack)
One Year Warranty

Compatibility:

The Avaya 120A4 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