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Cisco DPC3825 Home Gateway

Last Updated: Mon, 16 May 2016 > Related Articles


Learn about the available ports and an explanation of the status lights on a Cisco DPC3825 Home Gateway.


Important: This Gateway device is only approved for addition to the Cox network when purchased from Cox.

Front View

The Cisco DPC3825 is a DOCSIS 3.0 cable gateway.

Back View

The Cisco DPC3825 has the following ports available on the back of the gateway:

  • POWER - Connects the gateway to the power adapter.
  • USB - Connects to selected client devices.
  • ETHERNET - Four ports connect to the Ethernet port on your computer or home network.
  • WIRELESS SETUP - Initiates wireless setup. This feature allows the user to add new Wireless Protected Setup (WPS) compliant wireless clients to the home network.
  • RESET - Used to reset the gateway.

Modem Lights

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

Router LightStatusProblemSolution
PowerOnNone. The gateway is powered on.N/A
BlinkingNot connected to the Internet.Turn off all network devices, including the gateway and computers. Then turn on each device in the following order:
  1. Gateway
  2. Computer
Check the cable connections. The computer should be connected to one of the ports numbered 1-4 on the gateway.
OffNo powerVerify power supply connections and electrical outlet. Also make sure the outlet is not connected to a switch.
AmberNone. Narrowband operation.N/A
GreenNone. Bonded channel operation.N/A
AmberNone. Narrowband operation.N/A
GreenNone. Bonded channel operation.N/A
ONLINEOnNone. The gateway is registered on the network and operational.N/A
1 - 4
OnNone. The gateway is successfully connected to a device through that port.


BlinkingNone. There is network activity over that port.N/A
OffNo devices are connected.Verify Ethernet cable connections, the TCP/IP settings and the NIC. NIC drivers may need to be reinstalled. If these steps do not resolve the issue, contact Customer Support.
USBOnNone. There is a connection made through the USB port.N/A
BlinkingNone. There is network activity over the USB port.N/A
OffNo devices are connected.Verify all cable connections and try resetting the modem. If cable is OK and modem reset does not work, contact Customer Support.
WIRELESS LINKOnNone. Wireless access point is enabled.N/A
BlinkingNone. The gateway is actively sending or receiving data over the network.N/A
OffNone. Wireless access point is disabled by the user.N/A
WIRELESS SETUPOffNone. Wireless setup is not active.N/A
BlinkingNone. Wireless setup is active to add new wireless clients on the wireless network.N/A

Mac Address

The Cisco DPC3825 comes configured with wireless security. By default, the Cisco home networking gateway supports up to 802.11n wireless standards and uses WPA / WPA2 wireless security settings. The SSID and Passphrase are printed on the label on the gateway.

  • The SSID on the gateway is the same as the last 6 characters of the Wireless MAC address.
  • The Passphrase is the same as the 9-digit serial number of the Cisco home networking gateway.


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