Black Box 16 port - Manual (Page 130)

Black Box Console Server user guide 130
Admin Port
The port labelled ‘Admin’ is on the rear of the unit. When fitted with a 25-pin female
D-type connector the wiring is as follows:
If you wish to connect a terminal into the Admin Port, see the connection example in
Terminals on page 138 .
Pin Signal Function
2 RXD Receive
3 TXD Transmit
7 S/GND Signal Ground
all others - (do not connect)