
Chapter 1 Product Overview
Router Overview
LED Functions
Table 
Table 
LED | Color | Function | 
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PWR_OK  | Green  | On when DC power is being supplied to the router. The light blinks if an error  | 
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  | occurs during   | 
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ADSL_CD  | Green  | On when the ADSL carrier detects status and connects to Digital Subscriber  | 
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  | Line Access Multiplexer (DSLAM) successfully.  | 
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ADSL_RxD  | Green  | Blinks when the ADSL receives data.  | 
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ADSL_TxD  | Green  | Blinks when the ADSL transmits data. Off when no data is being uploaded.  | 
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E1 Status  | Green  | On when Ethernet 1 connects to the Ethernet interface successfully. Blinks  | 
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  | when Ethernet 1 receives or sends data, or when data passes through  | 
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  | Ethernet 1.  | 
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E2 Status  | Green  | On when Ethernet 2 connects to the Ethernet interface successfully. Blinks  | 
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  | when Ethernet 2 receives or sends data, or when data passes through  | 
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  | Ethernet 2.  | 
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E3 Status  | Green  | On when Ethernet 3 connects to the Ethernet interface successfully. Blinks  | 
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  | when Ethernet 3 receives or sends data, or when data passes through  | 
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  | Ethernet 3.  | 
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E4 Status  | Green  | On when Ethernet 4 connects to the Ethernet interface successfully. Blinks  | 
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  | when Ethernet 4 receives or sends data, or when data passes through  | 
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  | Ethernet 4.  | 
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LAN_RxD  | Green  | Blinks when the LAN port receives data from the WAN port.  | 
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LAN_TxD  | Green  | Blinks when the LAN port transmits data to the WAN port.  | 
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  | Cisco 837 Router and SOHO 97 Router Hardware Installation Guide  |