Chapter 5 Troubleshooting
Pinouts
Table | RJ45 1PPS/ToD Port Pinout (continued) | |||
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Pin | Signal Name | Direction | Description | |
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7 | TOD_P |
| Output or Input | Time of Day |
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| character |
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8 | TOD_N | Output or Input | Time of Day | |
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| character |
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Alarm Port Pinout
Table
Table | External Alarm Input Pinout | ||
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Pin | Signal Name | Description | |
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1 | ALARM0_IN | Alarm input 0 | |
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2 | ALARM1_IN | Alarm input 1 | |
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3 |
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| No connect |
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4 | ALARM2_IN | Alarm input 2 | |
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5 | ALARM3_IN | Alarm input 3 | |
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6 |
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| No connect |
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7 |
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| No connect |
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8 | COMMON | Alarm common | |
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Console/Aux RJ45 RS232 Serial Port Pinout
Table
Table | Console/Aux RJ45 RS232 serial port |
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Pin | Signal Name | Direction | Description |
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1 | RTS | Output | Request to send |
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2 | DTR | Output | Data Terminal Ready (always On). |
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3 | TXD | Output | Transmit data |
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4 | RI |
| Ring Indicator |
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5 | GND |
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6 | RXD | Input | Receive data |
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7 | DSR/DCD | Input | Data set ready/Data Carrier detect |
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8 | CTS | Input | Clear to send |
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Cisco ASR 903 Router Hardware Installation Guide
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