Avaya Definity TN570D Expansion Interface (TN570D)

Definity TN570D

Overview:

Provides interface between the TDM bus and packet bus, and fiber optic links interconnecting cabinets
Used in a Port Network (PN) between a PN and another PN in a direct-connect system, and between a PN and an SNI in a switch node carrier in a CSS-connected system
Provides control channel applications and time-slot interchanging between the PPN and EPN
Used when ISDN-BRI and/or ASAI is connected in an EPN
Carries circuit-switched data, packet-switched data, network control, timing control, and DS1 control
Communicates with the TN775B maintenance circuit pack in an EPN to send the EPN environmental and alarm status to the SPE
Replaced by the TN2305 or TN2306 when an ATM switch replaced the CSS
Used in an EPN that is supported by a Survivable Remote Processor (SRP)