The Avaya 120A4 CSU Module (Channel Service Unit) is a compact telecommunications interface designed to provide essential Channel Service Unit functions when used with compatible Avaya DS1 equipment. The module provides an integrated alternative to a larger external CSU, helping simplify installation and reduce the amount of separate equipment required in supported Avaya communications environments. Its compact design makes the 120A4 particularly useful for maintaining, servicing, or restoring existing Avaya systems that use compatible DS1 circuit packs.
Avaya 120A4 CSU Module (Channel Service Unit) Features
- Provides essential CSU functions when used in combination with compatible Avaya DS1 equipment.
- Compact design provides a convenient alternative to a larger external CSU.
- Designed to simplify installation in supported Avaya DS1 applications.
- Does not require option-switch settings.
- Does not require a separate DS1 cable.
- Provides connections for alarm contacts and network connectivity.
- Suitable for replacement, maintenance, and restoration of compatible Avaya communications equipment.
Compatibility
The Avaya 120A CSU product family is designed for use with compatible Avaya DS1 circuit packs in supported Definity, MultiVantage, and Communication Manager environments. The supplied legacy product information identifies the following DS1 circuit-pack families in connection with 120A CSU applications:
- TN464E through TN464HP
- TN2464CP and earlier
- TN767D or TN767E
- TN2313 or TN2313AP
Because the original compatibility information specifically references the 120A2 revision, customers replacing a CSU with a 120A4 should verify the installed DS1 circuit pack and system configuration before ordering. The 120A CSU installation and operating manual provided below can be referenced for additional technical information.
For organizations continuing to operate compatible Avaya communications equipment, the 120A4 provides a practical service component for maintaining an existing DS1 installation. Its compact form factor and integrated CSU functionality can reduce the need for a separate external CSU while allowing businesses to continue supporting established Avaya telecommunications infrastructure.
Includes
- Avaya 120A4 CSU Module (Channel Service Unit)
- Clip
- Cable
