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Chapter 1 Product Overview
Router Overview
1-6
Cisco 837 Router and SOHO 97 Router Hardware Installation Guide
78-14781-02
LED Functions
Table 1-2 summarizes the functions of the LEDs on the Cisco 837 router and the
SOHO 97 router.
Table 1-2 Functions of LEDs on the Cisco 837 Router and SOHO 97 Router
LED Color Function
PWR_OK
Green On when DC power is being supplied to the router. The light blinks if an error
occurs during boot-up.
ADSL_CD
Green On when the ADSL carrier detects status and connects to Digital Subscriber
Line Access Multiplexer (DSLAM) successfully.
ADSL_RxD
Green Blinks when the ADSL receives data.
ADSL_TxD
Green Blinks when the ADSL transmits data. Off when no data is being uploaded.
E1 Status
Green On when Ethernet 1 connects to the Ethernet interface successfully. Blinks
when Ethernet 1 receives or sends data, or when data passes through
Ethernet 1.
E2 Status
Green On when Ethernet 2 connects to the Ethernet interface successfully. Blinks
when Ethernet 2 receives or sends data, or when data passes through
Ethernet 2.
E3 Status
Green On when Ethernet 3 connects to the Ethernet interface successfully. Blinks
when Ethernet 3 receives or sends data, or when data passes through
Ethernet 3.
E4 Status
Green On when Ethernet 4 connects to the Ethernet interface successfully. Blinks
when Ethernet 4 receives or sends data, or when data passes through
Ethernet 4.
LAN_RxD
Green Blinks when the LAN port receives data from the WAN port.
LAN_TxD
Green Blinks when the LAN port transmits data to the WAN port.
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