• Shopping Cart
  • Contact Us
  • Select a Location
    Close Location Selection

    Current Location:

    Let us know the location you'd like to browse.

    Select a Location

Cisco DPC3825


Modem Information

DOCSIS 3.0 Single Band WiFi Modem

My WiFi Compatible

8x4 channel bonding with speeds of up to 150 Mbps on a wired connection

Cox recommends a DOCSIS 3.1 modem or gateway

Highest Service Level

Preferred 150

Front View

image of front view of modem

Click to enlarge.

After the cable modem successfully registers on the network, the POWER, DS, US, and ONLINE indicators illuminate continuously to indicate that the cable modem is online and fully operational.

Back View

image of Back View of DPQ3925 gateway

Click to enlarge.

The Cisco DPC3825 has the following ports available on the back.

  • POWER - Connects the modem to the power adapter
  • USB - Connects to selected client devices
  • ETHERNET - Provides internet access to a single device. Only one port is active at a time.
  • WIRELESS SETUP - Initiates wireless setup - allows the user to add new Wireless Protected Setup (WPS) compliant wireless clients to the home network
  • RESET - Used to reset the modem

MAC Address

MAC label

Click to enlarge.

The Cisco DPC3825 comes configured with wireless security. By default, the Cisco WiFi modem 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 modem.

  • The SSID on the modem is either the last 6 characters of the CM MAC Address or the SSID identified on the label.
  • The Passphrase is the same as the 9-digit S/N or serial number of the modem.


image of modem lights

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

BlinkingNot connected to the Internet
  1. Turn off all network devices, including the modem and computers. Then turn on each device in the following order.
    1. Modem
    2. Computer
  2. Check the connections. Computers connected by Ethernet must be connected to one of the ports numbered 1 through 4 on the back of the modem.
OffNo power - Verify power supply connections and electrical outlet. Also make sure the outlet is not connected to a switch.
AmberNone - narrowband operation
GreenNone - bonded channel operation
AmberNone - narrowband operation
GreenNone - bonded channel operation
ONLINEOnNone - modem registered on the network and operational
1 - 4
OnNone - modem successfully connected to a device through that port
BlinkingNone - network activity over that port
OffNo devices are connected - Verify Ethernet cable connections, the TCP/IP settings and the NIC. NIC drivers may need to be reinstalled.
USBOnNone - connection made through the USB port
BlinkingNone - network activity over the USB port
OffNo devices are connected - Verify all cable connections and try resetting the modem.
WIRELESS LINKOnNone - wireless access point enabled
BlinkingNone - modem actively sending or receiving data over the network
OffNone wireless access point disabled by the user
WIRELESS SETUP (WPS)OffNone - wireless setup not active
BlinkingNone - wireless setup active to add new wireless clients on the wireless network

Manufacturer Resources

For more detailed technical information on the DPC3825, use the resources below from Cisco.

Search for More Articles