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58 CHAPTER A: OPTIONAL CABLE SPECIFICATIONS
Figure 33 V.35 DCE Cable Assembly
Table 34 describes V.35 DCE cable pinouts.
X.21 DTE Cable Pinouts Figure 34 illustrates the X.21 DTE cable.
Table 34 V.35 DCE cable Pinouts
DB-50 Signal
Signal
Direction
34PIN Signal
31 CTS/RTS <— C RTS
2 RTS/CTS —> D CTS
26 DTR/DSR —> E DSR
1 LL/DCD —> F RLSD
6 DSR/DTR <— H DTR
30 DCD/LL <— K LT
20 RxD/TxD+ <— P SD+
44 RxD/TxD- <— S SD-
15 TxD/RxD+ —> R RD+
39 TxD/RxD- —> T RD-
19 RxC/TxCE+ <— U SCTE+
43 RxC/TxCE- <— W SCTE-
17 NIL/RxC+ —> V SCR+
41 NIL/RxC- —> X SCR-
16 TxCE/TxC+ —> Y SCT+
40 TxCE/TxC- —> AA SCT-
50 GND - A Shield_GND
7 GND - B Circuit_GND
24 RxD-REST GND - -
49 RxC-REST GND - -
25 TxC-REST GND - -
Enlarged A side
DB50 Male
V.35 Female
Label
Enlarged B side