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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

Output

Input

Output

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

Output

Input

Output

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

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Case Communications 8000 Series Guida di Installazione Pagina 50

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