34Chapter 1 Cables and power
Quad T1/E1 CSU/DSU WAN interface card LEDs
The following figure shows the LEDs on the quad T1/E1 channel service unit/ digital service unit (CSU/DSU) WAN interface card.
Figure 11 LEDs on the quad T1/E1 CSU/DSU WAN interface card
LED 1 LED 2
LED 3 LED 4
CS160012A
The following table describes the LEDs on the quad T1/E1 CSU/DSU WAN interface card.
Table 12 LED indicators on the quad T1/E1 CSU/DSU WAN interface card
LED | Indicator | Description |
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LED 1 | Off | Port 1 is disabled. |
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| On | Port 1 is enabled and operating normally. |
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| Flashing | Port 1 is enabled and in an alarm state (red, yellow, or blue). |
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LED 2 | Off | Port 2 is disabled. |
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| On | Port 2 is enabled and operating normally. |
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| Flashing | Port 2 is enabled and in an alarm state (red, yellow, or blue). |
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LED 3 | Off | Port 3 is disabled. |
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| On | Port 3 is enabled and operating normally. |
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| Flashing | Port 3 is enabled and in an alarm state (red, yellow, or blue). |
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LED 4 | Off | Port 4 is disabled. |
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| On | Port 4 is enabled and operating normally. |
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| Flashing | Port 4 is enabled and in an alarm state (red, yellow, or blue). |
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