Troubleshooting A-15
Rear Panel LEDs
Cisco 1604
NT1 Green A physical connection has been established from the router
internal NT1 to the ISDN central office switch.
OK (next to ISDN PHONE port) Green The device connected to the router ISDN S/T port has
established a physical connection with the ISDN central office
switch.
Cisco 1605
LNK
(next to ETHERNET1 10BASET)
OK
(next to WIC slot)
Green
Green
Indicates 10BaseT link integrity for the Ethernet 1 port.
The WAN interface card is correctly installed in the router.
Table A-4 Rear Panel LED Functions (Continued)
LED Color Description
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