Installation guide

D.3 NTU Pin Assignments
Tables D-2 to D-4 show the V.24, X.21 and V.35 interface pin assignments
presented to a PSS/KiloStream NTU at the NTU end of the cables specified
in Table D-1. For the pinouts at the PIM end of the cables refer to
Appendix B.
Table D-2 V.24 Interface Pin Assignments
(At NTU End of Cable X818-401211)
PIN NO. DIRECTION ASSIGNMENT
2
3
4
5
6
7
8
15
17
20
Output
Input
Output
Input
Input
–
Input
Input
Input
Output
Transmit Data (TxD)
Receive Data (RxD)
Request To Send (RTS)
Clear To Send (CTS)
Data Set Ready (DSR)
Signal Ground (SGND)
Data Carrier Detect (DCD)
Transmit Clock (TxC)
Receive Clock (RxC)
Data Terminal Ready (DTR)
Table D-3 X.21 Interface Pin Assignments
(At NTU End of Cable X890-408411)
PIN NO. DIRECTION ASSIGNMENT
3
10
6
13
2
9
4
11
5
12
8
Output
Output
Input
Input
Output
Output
Input
Input
Input
Input
–
Control (CA)
Control (CB)
Signal Element Timing (SA)
Signal Element TIming (SB)
Transmit Data (TA)
Transmit Data (TB)
Receive Data (RA)
Receive Data (RB)
Indication (IA)
Indication (IB)
Signal Ground (G)
X870-300451 Issue 2 D-4 Rev.0