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DEFINITY Made Easy Tools
Issue 2, November 2000



DEFINITY Hardware

TN775B/C

The TN775B/C boards are used in maintenance and monitor power failure signals in an EPN cabinet in R7si/r or later. These circuit packs also monitor the clock, monitor and control the power supplies and battery charger, and monitor air flow and high temperature sensors. These circuit packs provide 2 serial links to communicate with Expansion Interface (EI) circuit packs, and provide an RS-232 interface for connection to an administration terminal. Each circuit pack contains a 3-position switch to control emergency power transfer.

The TN775C contains a new DC to DC power converter and is used in maintenance to monitor the R7 or later processor in a Survivable Remote Expansion Port Network (SREPN) configuration.

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