
60CHAPTER A: OPTIONAL CABLE SPECIFICATIONS
Table 36 X.21 DCE Cable Pinouts (continued)
DB50 | Signal | Signal Direction | Signal | DB15 |
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14 | CTS/RTS- | <- | Control- | 10 |
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20 | RXD/TXD+ | <- | Transmit+ | 2 |
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44 | RXD/TXD- | <- | Transmit- | 9 |
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15 | TXD/RXD+ | Receiver+ | 4 | |
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39 | TXD/RXD- | Receiver- | 11 | |
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16 | RXC/TXCE+ | Timing+ | 6 | |
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40 | RXC/TXCE- | Timing- | 13 | |
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- | Shielding sheath | Shielding sheath | - | |
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EIA/TIA-449 DTE Cable Figure 36 illustrates the EIA/TIA-449 DTE cable.
Pinouts
Figure 36 EIA/TIA-449 DTE Cable Assembly
Table 37 describes EIA/TIA-449 DTE cable pinouts.
Table 37 EIA/TIA-449 DTE Cable Pinouts
DB50 | Signal | Signal Direction | Signal | DB37 |
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7 | GND | Circuit GND | 19 | |
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23 | DTE/DCE | - | Circuit GND | 19 |
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50 | GND | Sield GND | 1 | |
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8 | DTR/DSR+ | TR+ | 12 | |
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32 | DTR/DSR- | TR- | 30 | |
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13 | DSR/DTR+ | <- | DM+ | 11 |
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37 | DSR/DTR- | <- | DM- | 29 |
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10 | RTS/CTS+ | RS+ | 7 | |
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34 | RTS/CTS- | RS- | 25 | |
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38 | CTS/RTS+ | <- | CS+ | 9 |
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14 | CTS/RTS- | <- | CS- | 27 |
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36 | DCD/DCD+ | <- | RR+ | 13 |
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12 | DCD/DCD- | <- | RR- | 31 |
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1 | LL/LL | LL | 10 | |
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20 | RXD/TXD+ | <- | RD+ | 6 |
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44 | RXD/TXD- | <- | RD- | 24 |
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15 | TXD/RXD+ | SD+ | 4 | |
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39 | TXD/RXD- | SD- | 22 | |
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16 | TXCE/RXC+ | TT+ | 17 | |
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