Cisco DPC3825 router user manual
- June 7, 2024
- Cox
Table of Contents
Cisco DPC3825 router
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Modem Information
DOCSIS 3.0 Single Band WiFi Modem
My WiFi Compatible
8×4 channel bonding with speeds of up to 150 Mbps on a wired connection
Cox recommends a DOCSIS 3.1 modem or gateway
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Highest Service Level
Preferred 150
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Front View
| | 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.
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Back View
| | 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 (login/Reset instructions)
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MAC Address
| | 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.
Troubleshooting
The lights indicate the current status of your modem. To troubleshoot any connection problems, use the table below.
| Light | Status | Problem |
|---|---|---|
| POWER | On | None |
| Blinking | Not connected to the Internet |
- Turn off all network devices, including the modem and computers. Then turn on each device in the following order.
- Modem
- Computer
- 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.
Off| No power – Verify power supply connections and electrical outlet. Also
make sure the outlet is not connected to a switch.
DS| On| None
Amber| None – narrowband operation
Green| None – bonded channel operation
US| On| None
Amber| None – narrowband operation
Green| None – bonded channel operation
ONLINE| On| None – modem registered on the network and operational
ETHERNET
1 – 4| On| None – modem successfully connected to a device through that port
Blinking| None – network activity over that port
Off| No devices are connected – Verify Ethernet cable connections, the TCP/IP
settings and the NIC. NIC drivers may need to be reinstalled.
USB| On| None – connection made through the USB port
Blinking| None – network activity over the USB port
Off| No devices are connected – Verify all cable connections and try resetting
the modem.
WIRELESS LINK| On| None – wireless access point enabled
Blinking| None – modem actively sending or receiving data over the network
Off| None wireless access point disabled by the user
WIRELESS SETUP (WPS)| Off| None – wireless setup not active
Blinking| None – 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.