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RCA DCM425 Digital Cable Modem manual

RCA DCM425 Digital Cable Modem manual Image

RCA DCM425 Digital Cable Modem

Modem Information

Cable Modem

DOCSIS 2.0 with speeds of up to 25 Mbps on a wired connection

Cox recommends a DOCSIS 3.0 16×4 or higher modem

What does this mean?

Highest Service Level


Front View

RCA DCM425 front view

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After the cable modem successfully registers on the network, the Cable Link and Internet indicators illuminate continuously to indicate that the cable modem is online and fully operational.

Back View

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The RCA DCM425 has the following ports available on the back of the modem.
  • Power – Connects the cable modem to the power adapter
  • Reset – Resets the cable modem
  • ETHERNET – Connects to the Ethernet port on your computer
  • USB – Connects to the USB port on your computer
  • Cable – Connects to the cable wall outlet

The RESET button is for maintenance purposes only.

MAC Address

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MAC addresses are written as 12 digits containing both letters and numbers (0-9, A-F). A MAC address is unique. The first six characters of the MAC address are unique to the manufacturer of the device.


The modem lights indicate the current status of your cable modem. To troubleshoot any connection problems, use the table below.

By pressing the Internet On / Off button, it will put the modem in standby mode. In standby mode, the Cable Activity LED will be off, and the connection to the internet will be lost.

Modem Light Status Problem
Solid Green None.
Off No power. Verify power supply connections and electrical outlet. Also make sure the outlet is not connected to a switch.
PC Link Solid Green None.
Flashing None. Transmitting data.
Off Unable to detect computer connection. Verify Ethernet/USB cable connections, the TCP/IP settings and the NIC. You might need to reinstall the NIC drivers.
Cable-Link Solid Green None.
Flashing green Looking for cable connection. Verify all cable connections and try resetting the modem.
Off No cable connection. Verify all cable connections and try resetting the modem.
Activity Blinking None. Transmitting or receiving data.
Off None. No data being transferred.
Message Off None.

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