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3.5 Information about the Physical Trunk Cards
Switch Settings
Switch | Type | Usage and Status Definition |
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Termination | Slide | Select 120 Ω (default) or 75 Ω to match the connector type to be |
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A/B | Slide | When using an RJ45 connector, select A (default) for trunk or B for |
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| When using BNC connectors, make sure that A is selected. |
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Pin Assignments
RJ45 Connector for Trunk Use
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| No. | Signal Name | Level [V] | Function |
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| 8 | 1 | RX+ | (+) | Receive data (+) | |
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| 2 | RX- | Receive data | |||
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| 1 | 3 | Reserved | – | – |
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| 4 | TX- | Transmit data | |
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| 5 | TX+ | (+) | Transmit data (+) |
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| Reserved | – | – | |
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RJ45 Connector for Extension Use
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| No. | Signal Name | Level [V] | Function |
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| 8 | 1 | TX- | Transmit data | ||
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| 2 | TX+ | (+) | Transmit data (+) | ||
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| 1 | 3 | Reserved | – | – |
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| 4 | RX+ | (+) | Receive data (+) |
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| 5 | RX- | Receive data | |
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| Reserved | – | – | |
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BNC (coaxial) Connector (TX)
| No. | Signal Name | Level [V] | Function |
1 | 1 | TX+ | (+) | Transmit data (+) |
2 | 2 | TX- | Transmit data |