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Schnittstellen-Anschlussbezeichnungen V.24/RS232C/DIN66020
Short cut Description Direction Pin number
DIN CCITT EIA Short 25pin 9pin 96pin
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E1 101 AA GND Prot. Ground DTE<->DCE U+1 U 10c
E2 102 AB GND Signal Ground DTE<->DCE 7 5 16c
D1 103 BA TxD Trans. Data DTE ->DCE 2 3 11c
D2 104 BB RxD Receive Data DTE<- DCE 3 2 12c
M1 107 CC DSR Data Set Ready DTE<- DCE 6 6 15c
M2 106 CB CTS Clear to Send DTE<- DCE 5 8 14c
M3 125 CE RI Ring Indicator DTE<- DCE 22 9 19a
M4 112 - - Data Sign. Rate DTE<- DCE 12 - 22c
M5 109 CF DCD Data Carrier Det. DTE<- DCE 8 1 18c
S1.1 108/1 - - Connect Data Set DTE ->DCE 20 4 16a
S1.2 108/2 CD DTR Data Term. Ready DTE ->DCE 20 4 16a
S2 105 CA RTS Request to Send DTE ->DCE 4 7 13c
S4 111 CH SEL Data Sign.Sel. DTE ->DCE 23 - 20a
PM1 142 - - - DTE<- DCE 25 - 22a
PS2 140 - - Rem. Dig. Loop DTE ->DCE 21 - 18a
PS3 141 - - Analog Loop DTE ->DCE 18 - 14a
T1 113 DA XCK Transm. Clock DTE ->DCE 24 - 21a
T2 114 DB TCK Transm. Clock DTE<- DCE 15 - 11a
T4 115 DD RCK Receiv. Clock DTE<- DCE 17 - 13a
U = Unit cover
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