Introduction 
Welcome to the exciting world of high-speed Internet and high-quality digital 
telephone service. Your new Cisco
®
 Model DPC3925 DOCSIS
®
 3.0 or EPC3925 
EuroDOCSIS™ Wireless Residential Gateway with Embedded Digital Voice Adapter 
is a cable modem that meets industry standards for high-speed data connectivity 
along with reliable digital telephone service. The DPC3925 and EPC3925 residential 
gateway delivers data, voice and wired (Ethernet) or wireless gateway capabilities to 
connect a variety of devices in the home or small office and support high-speed data 
access and cost-effective voice services, all in one device. With a DPC3925 or 
EPC3925 residential gateway, your Internet enjoyment, home and business 
communications, and personal productivity will surely soar. 
This guide provides procedures and recommendations for placing, installing, 
configuring, operating, and troubleshooting your DPC3925 and EPC3925 residential 
gateway for high-speed Internet and digital telephone service for your home or 
office. Refer to the appropriate section in this guide for the specific information you 
need for your situation. Contact your service provider for more information about 
subscribing to these services. 
Benefits and Features 
Your new DPC3925 and EPC3925 residential gateway offers the following 
outstanding benefits and features: 
  Compliant with DOCSIS 3.0, 2.0, and 1.x standards along with PacketCable™ 
and EuroPacketCable™ specifications to deliver high-end performance and 
reliability 
  High performance broadband Internet connectivity to energize your online 
experience 
  Two-line embedded digital voice adapter for wired telephony service 
  Four 1000/100/10BASE-T Ethernet ports to provide wired connectivity 
  802.11n Wireless Access Point 
  Wi-Fi Protected Setup (WPS), including a push button switch to activate WPS for 
simplified and secure wireless setup 
  User configurable Parental Control blocks access to undesirable Internet sites 
  Advanced firewall technology deters hackers and protects the home network 
from unauthorized access 
  Attractive compact design that allows for vertical, horizontal, or wall-mounted 
operation