Avaya Definity TN-765
The TN765 has 4 Datalinks to the TDM bus and a link through the memorybus to the processor. THe TN765 is an interface to the DCS, ISDN, and AUDIX interface service. The TN765 allows direct access to 1 data link from an EIA porton the circuit pack in AC-powered standard reliability systems. The other data links connect to a digital lineTN754 circuit and a 7400D data module to access a message service adjunct (MSA), DCS, CMS, ISDN, or AUDIX. Datalinks can connect to DS1 tie trunks to access DCS or ISDN applications.
The TN765 terminates BX.25 and ISDN link access procedure on the D-Channel (LAPD)protocals. The MCC supports 2 TN765 circuit packs using a total of 8 data links. Single-carriercabinets and CSSs support only 1 TN765 circuit pack using 4 Data links. The R6csi does not support the TN765 circuit pack.