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.
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>