Thrane&Thrane TT-3080A, User Manual, Page: 111 / 124

Interfaces Interfaces Interfaces Interfaces Technical Specifications Technical Specifications Technical Specifications Technical Specifications
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9.1.5 ISDN
The pin out is as follows:
Pin no. Pin Function Signal Direction
1 Not used

2 Not used

3 RxP Input
4 TxP Output
5 TxN Output
6 RxN Input
7 Not used 
8 Not used 
9.1.6 RS-232 interface
The RS-232 is a DCE type of interface and the signals are as
follows:
Pin Number Pin Function Signal Direction
1 DCD Output
2 RXD Output
3 TXD Input
4 DTR Input
5 Ground 
6 DSR Output
7 RTS Input
8 CTS Output
9 RI Output