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RCA DCM315R Cable Modem

Last Updated: Wed, 09 Mar 2016 > Related Articles


Learn about the available ports and an explanation of the status lights on a RCA DCM315R cable modem.



The RCA DCM315R is a DOCSIS 2.0 cable modem. 

Front View

After the cable modem has successfully registered on the network, the Cable Link and Internet indicators illuminate continuously to indicate that the cable modem is online and fully operational. For more details, refer to the Modem Lights section.

Back View

The RCA DCM315R has the following ports available on the back of the modem:

  • Power - Connects the cable modem to the power adapter.
  • ETHERNET - Connects to the Ethernet port on your computer.
  • USB - Connects to the USB port on your computer.
  • Reset - Resets the cable modem.
  • CABLE - Connects to the cable wall outlet.

The RESET button is for maintenance purposes only. For more details, refer to the Modem Lights section.

Modem Lights

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

Ethernet Connection - Modem functioning correctly

Modem Looking for PC

Modem Looking for Cable Connection 

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

Modem LightStatusProblemSolution
Solid GreenNone. Power is properly connected.N/A
OffNo power.Verify power supply connections and electrical outlet. Also make sure the outlet is not connected to a switch.
PC LinkSolid GreenNone.N/A
FlashingNone. Modem is transmitting dataN/A
OffUnable to detect computer connection.Verify Ethernet/USB cable connections, the TCP/IP settings and the NIC. You might need to reinstall the NIC drivers. If this does not resolve the issue, contact Customer Support.
Cable-LinkSolid GreenNone.N/A
Flashing greenLooking for cable connection.Verify all cable connections and try resetting the modem. If connection is OK and modem reset does not correct the problem, contact Customer Support.
offNo cable connection.
ActivityBlinkingNone. Transmitting or receiving dataN/A
OffNone. No data being transferred.N/A

MAC Address Label

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.

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