Installing The Vanguard 3400 Series
This table describes the DB25 connector pinouts for port 1:
| DB25 V.24 Pinouts (DCE) |
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| ITU Circuit | I/O | Signal Name |
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| 1 |
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| Protective Ground |
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| 2 |
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| 103 | INPUT | Transmitted data |
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| 3 |
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| 104 | OUTPUT | Received data |
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| 4 |
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| 105 | INPUT | Request To Send |
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| 5 |
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| 106 | OUTPUT | Clear To Send |
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| 6 |
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| 107 | OUTPUT | Data Set Ready |
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| 7 |
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| 102 | Signal Ground |
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| 8 |
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| 109 | OUTPUT | Data Carrier Detect |
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| 14 |
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| INPUT | Data Restraint Out |
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| 15 |
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| 114 | OUTPUT | Transmitted Clock |
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| 16 |
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| N/C |
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| 17 |
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| 115 | OUTPUT | Received Clock |
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| 18 |
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| INPUT | External Rx Clock |
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| 20 |
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| 108/2 | INPUT | Data Terminal Ready |
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| 21 |
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| N/C |
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| 22 |
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| 125 | OUTPUT | Ring Indicator |
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| 24 |
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| 113 | INPUT | External Tx Clock |
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| 25 |
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| 142 | INPUT | Make Busy |
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Port 4 |
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This port has an | |||||||||||||||||
| for communicating with, configuring, monitoring, and for coldloading the node. | ||||||||||||||||
| Figure | ||||||||||||||||
| Pin 1 |
| Pin 8 |
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Figure 3-5. Port 4 Pin Numbers
Installation and Replacement |