Connecting the Modem
Terayon DOCSIS 615 Cable Modem Installation Guide
15
Reading Your Modem Lights
The indicator LEDs on the front panel of the Terayon cable modem
tell you what’s happening during a communications session. The
table below tells you what each LED indicator means.
“X” = Don’t Care
Online
Message
Receive
Send
Link
Modem Status
ON
ON
ON
ON
ON
Modem reset (Displays briefly)
Blink
OFF
OFF
OFF
OFF
Self-Test: No error.
Blink
Blink
OFF
OFF
OFF
Self-Test failed: Memory problem.
Blink
OFF
OFF
Blink
OFF
Self-Test failed: No valid application
image found.
Blink
Blink
OFF
Blink
OFF
Self-Test failed: Error during firmware
download.
Blink
ON
ON
ON
OFF
Self-Test failed: Invalid modem
identity.
Blink
X
X
X
Blink
Scanning for valid downstream
channel.
Blink
X
X
X
ON
Scanning for valid upstream channel.
Blink
Blink
OFF
OFF
X
No more valid upstream for this
downstream.
Blink
ON
OFF
OFF
X
Initial maintenance time-out (T2)
during scan.
Blink
ON
OFF
ON
X
Station maintenance time-out (T4)
during scan.
Blink
OFF
ON
OFF
ON
Failed DHCP (Displays briefly).
Blink
ON
ON
OFF
ON
Failed TFTP config file (Displays
briefly).
Blink
OFF
ON
ON
ON
Modem failed registration (Displays
briefly).
Blink
Blink
Blink
Blink
ON
Modem performing time of day
protocol.
ON
X
X
X
X
Modem is operational.
ON
X
X
X
X
Modem Ethernet or USB port
connected.
ON
X
Blink
X
ON
Modem receiving data on Ethernet or
USB port.
ON
X
X
Blink
X
Modem transmitting data to CATV
cable.
ON
ON
X
X
X
Message pending (controlled by
cable company).
Содержание ECM 615
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