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DIAGNOSTIC LED(S)
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LED
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Color
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Status
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Condition
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ALRT
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Orange
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On
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Error detected on network
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ALRT
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Orange
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Blinking (slow)
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Device is loading software during power up or new software is being downloaded
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ALRT
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Orange
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Blinking (fast)
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Self diagnostic test is being conducted during power up
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ALRT
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Orange
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Off
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Device has passed diagnostic tests and is working properly
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PWR
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Green
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On
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Power is on
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PWR
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Green
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Blinking (slow)
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New software is being downloaded
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PWR
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Green
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Blinking (fast)
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Self diagnostic test or software loading is being conducted during power up
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PWR
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Green
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Off
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Power is off
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LINK
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Orange
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On
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LAN connection established
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LINK
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Orange
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Off
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No LAN connection detected
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ISDN
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Green
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On
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Device is connected to a working ISDN line
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ISDN
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Green
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Blinking
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An error condition has been detected on the ISDN line
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ISDN
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Green
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Off
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ISDN condition not present
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CH1
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Yellow
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On
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ISDN call is in progress on channel 1
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CH1
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Yellow
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Blinking
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ISDN call is in dialing state on channel 1
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CH1
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Yellow
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Off
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ISDN call is not in progress on channel 1
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CH2
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Yellow
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On
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ISDN call is in progress on channel 2
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CH2
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Yellow
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Blinking
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ISDN call is in dialing state on channel 2
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CH2
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Yellow
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Off
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ISDN call is not in progress on channel 2
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VOICE
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Yellow
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On
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Voice call in progress
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VOICE
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Yellow
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Blinking
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Handset is off hook, dial tone present; call has been dialed and is ringing out, or an incoming call is being received
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VOICE
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Yellow
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Off
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Voice call not in progress
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WAN
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Yellow
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On
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WAN connection is valid and can pass data
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WAN
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Yellow
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Blinking
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Error detected on the WAN port
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Note:
ISDN utilization LEDs provide an indication of ISDN utilization as a percentage of network loading. If ISDN utilization is consistently indicated at 100%, the device may be configured to filter some of the data, or an additional link may be required.
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