TB9400/TN9275 Installation and Operation Installation 87
© Tait International Limited May 2023
4.6.9 Connecting General Purpose Inputs and Outputs
General purpose inputs and outputs are connected via the DB-25 connector
on the rear panel of the base station.
Analog line operation requires reciter hardware version 1.01 or later.
Reciters with hardware version 1.0 can be upgraded to version 1.01 at a
Tait service centre. Contact your Tait dealer for details.
The existing Tx key and Rx gate signals are sufficient for balanced
audio interconnection with connecting equipment compatible with 5V
TTL level signaling. Tait also offers an isolation adapter that provides
E&M isolated signaling (order number TBC101A).
The pin allocations for the DB-25 connector are given in the following
table (note that not all pins are used in this release of the base station):
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