Cable Modem Troubleshooting: Arris/Touchstone CM450

Light patterns, images, manuals and more helpful info for the Arris/Touchstone CM450 cable modem –

Manufacturer: Arris/Touchstone Model: CM450
Modem Light Indicators

Off – No power to modem.
Solid – Modem acquired or Power-on self test.
Flashing – Any other status (ie. Scanning downstream, ranging…)


Flashing – Standby switch active or Obtaining data IP address (DHCP)
Solid – Modem acquired and ready to transmit data.

Cable Flashing – Indicates activity over cable interface or Scanning for downstream carrier.
Solid – Ranging, obtaining data IP address, downloading, or acquired with no activity.

Off – USB connection not detected.
Solid – USB connection detected.
Flashing – Indicates activity over USB interface.


Off – Ethernet connection not detected.
Solid – Ethernet connection detected.
Flashing – Indicates activity over Ethernet interface.

Notes and Useful Information:

Installation and User Manual
Manufacturer Product Website (no modem support on manufacturer site)

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