Interface Pinouts
Console Pinouts
The connector shown here and pinouts described here correspond to the connector labeled “Console” on the back of the unit.
13 
1
DB25 Female DCE
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Contact | CCITT | IEEE |
| Circuit | Direction | |
Number | Circuit | Circuit |
| Name | To | From |
| Number | Desig. |
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| DCE | DCE |
1 | 101 | AA |
| Protective Ground | NA | |
2 | 103 | BA |
| Transmitted Data | X |
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3 | 104 | BB |
| Received Data |
| X |
5 | 106 | CB |
| Clear to Send |
| X |
6 | 107 | CC |
| Data Set Ready |
| X |
7 | 102 | AB |
| Signal Ground | NA | |
8 | 109 | CF | Received Line Signal Detector (CD) |
| X | |
20 | 108.2 | CD |
| Data Terminal Ready | X |
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22 | 125 | CE |
| Ring Indicator |
| X |
Figure D-3 Console Pinouts
The connecting cable must be a shielded cable.
When connecting the router console directly to a modem, a null modem cable must be used because both the router console and the modem are DCE devices. A null modem cable with pinouts according to the following figure must be used.
router Contact Number | Modem Contact Number |
8 | 20 |
3 | 2 |
2 | 3 |
20 | 8 |
7 | 7 |
4 | 5 |
5 | 4 |
22 | 22 |
Figure D-4 Console Null Modem Cable Pinouts
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