Avaya 120A CSU Module (106606536)
The Avaya Definity 120A ICSU plugs directly into system back-plane, plugs directly into the DS1 Circuit Card I/O connector. Compatible with DS1/ISDN PRI Trunk Circuit Card (TN767E) and Universal DS1/ISDN PRI Trunk Circuit Card (TN464F). DS1 CPE loop-back jack required when network provider does not install a smart jack. Includes clips and cable.
Features: