The Avaya 120A2 CSU Module (Channel Service Unit) is designed to provide essential Channel Service Unit functions when used with a compatible Avaya DS1 circuit pack. Its compact design provides an integrated alternative to a larger external CSU, helping simplify installation in supported Avaya telephone system environments. The 120A2 requires no option-switch settings or separate DS1 cable, reducing the amount of external equipment required for a compatible installation.
Avaya 120A2 CSU Module (Channel Service Unit) Features
- Provides essential external CSU functions when used with a compatible DS1 circuit pack.
- Compact design is easier to install than a traditional external CSU.
- Does not require option-switch settings.
- Does not require a separate DS1 cable.
- Designed for use with compatible Avaya TN-series DS1 circuit packs.
- Vintage 2 (120A2) provides enhancements supporting the payload loopback function when ESF framing is selected.
- Payload loopback operation requires a compatible 700A loopback jack.
Compatibility
The Avaya 120A2 CSU Module is compatible with several Avaya DS1 circuit packs used in supported Definity, MultiVantage, and Communication Manager environments. Always verify the installed DS1 circuit pack and system configuration before installation.
- TN464E through TN464HP DS1 circuit packs.
- TN2464CP and earlier revisions.
- TN767D and TN767E.
- TN2313 and TN2313AP.
- Supported on Definity, MultiVantage, and Communication Manager servers that support compatible TN circuit packs.
For organizations maintaining existing Avaya communications equipment, the 120A2 provides a practical solution for DS1 applications requiring CSU functionality without adding a separate external CSU. Its small form factor and simplified installation make it particularly useful when servicing, restoring, or maintaining compatible legacy Avaya systems.
Includes
- Avaya 120A2 CSU Module
- Clip
- Cable
