Avaya Definity TN765 Processor Interface (Refurbished)Avaya Definity TN765 Processor Interface. More Information Integrates the tone generator, tone detection, system clock, and synchronization functions onto one circuit pack for use in standard, high, and critical reliability systems Provides 4 data links to the Time Division Multiplexing (TDM) bus and a link through the memory bus to the processor Interfaces the 3B2 MSA, DCS, ISDN, and Audix Interface service Allows direct access to one data link from