Appendix E: Connector Pinouts
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Pin | Name |
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| I/O | Description |
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1 | Shield |
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| I/O | Shield for cable |
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2 | DPR |
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| I | Digit Present |
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3 | ACR |
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| O | Abandon Call and Retry |
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4 | CRQ |
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| I | Call Request |
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5 | PND |
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| O | Present Next Digit |
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6 | PWI |
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| O | Power Indication |
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7 | SG |
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| I/O | Signal Ground |
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13 | DSC |
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| O | Distant Station Connect |
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14 | NB1 |
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| I | Digit LSB |
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15 | NB2 |
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| I | Digit bit 2 |
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16 | NB4 |
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| I | Digit bit 3 |
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17 | NB8 |
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| I | Digit bit MSB |
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22 | DLO |
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| O | Data Line Occupied |
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NC |
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| N/A | No Connection |
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NC |
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| N/A | No Connection |
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NC |
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| N/A | No Connection |
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I = Input | O = Output | N/A = Not Applicable |
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| PIN 1 |
| PIN 8 |
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ISDN
Figure E-5
RJ-45 Dial Line Connector U Interface
Table
Pin | Description |
4 | Ring |
5 | Tip |
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122 | ISU 2x64 Dual Port ISDN Service Unit User Manual |
