Instruction/ maintenance manual of the product DPC3925 Cisco Systems
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Cisco Model DPC3925 and EPC3925 8x4 DOCSIS 3.0 Wireless Residential Gateway with Embedded Digital Voice Adapter User Guide In This Document IMPORTANT SAFETY INSTRUCTIONS ............................................................... 2 Introducti on .
2 4021192 Rev B IMPORTANT SAFETY INSTRU CTIONS IMPORTANT SAFETY INSTRUCTIONS N o t i c e t o I n s t a l l e r s The servicing instructions in this notice are for use by qualified service personnel only.
4021192 Rev B 3 IMPORTANT SAFETY INSTR UCTIONS M i t t e i lu n g f ü r C A T V - T e c h n i k e r Die in dieser Mitteilung aufgeführten Wartungsanweisungen sind ausschließlich für qualifiziertes Fachpersonal bestimmt.
4 4021192 Rev B IMPORTANT SAFETY INSTRU CTIONS I M P O R T A N T S A FE T Y I N S T R U CT I O N S 1) Read these instructions. 2) Keep these instructions. 3) Heed all warnings. 4) Follow all instructions. 5) Do not use this apparatus near wate r. 6) Clean only with dry cloth.
4021192 Rev B 5 IMPORTANT SAFETY INSTR UCTIONS P r o t e c t t h e P r o d u c t f r o m L i g ht n i n g In addition to disconnecting the AC power from the wall outlet, disconnect the signal inputs.
6 4021192 Rev B IMPORTANT SAFETY INSTRU CTIONS C h e ck P r o d u c t S a f e t y Upon completion of any service or repairs to this product, the service technician must perf orm safety checks to determine that this product is in proper operating condition.
IMPORTANT SAFETY INSTR UCTIONS 4021192 Rev B 7 United States FCC Compliance This device has been teste d and found to comply with the limits fo r a Class B digital device, pursuant to part 15 of the F CC Rules. These limits are designed to provide reasonable protection against such interferenc e in a residential installation.
IMPORTANT SAFETY INSTR UCTIONS 8 4021192 Rev B R a d ia t i o n E x p o s u r e S t a t e m e n t s Note: This transmitter must no t be co-located or operated in conju nction with any other antenna or transmitter. Th is equipment should be ins talled and operated with a minimum distance of 7.
IMPORTANT SAFETY INSTR UCTIONS 4021192 Rev B 9 CE Compliance D e c la r a t i o n o f C o n f o r m i t y w i t h R e g a r d t o t h e E U D i r e c t i v e 1 9 9 9 / 5 / E C ( R & T T E D i r e .
IMPORTANT SAFETY INSTR UCTIONS 10 4021192 Rev B Note: The full declaration of confo rmity for this product can be found in the Declarations of Conformity and Regulator y Information section of the approp riate product hardware installation guide, which is av ailable on Cisco.
IMPORTANT SAFETY INSTR UCTIONS 4021192 Rev B 11 A n t en n a s Use only the antenna supp lied with the product. 20090312 CE_Gateway.
12 4021192 Rev B Introduction Introduction Welcome to the exciting world of h igh-speed Internet and high -quality digital telephone service. Your new Cisco ® Model DPC3925 DOCSIS ® 3.
4021192 Rev B 13 Introduction Color-coded interface ports and correspon ding cables simplify installation and setup DOCSIS-5 compliant LED labeling a nd behavior provides a user and technician.
14 4021192 Rev B What's In the Carton? What's In the Carton? When you receive your wireless resident ial gateway, you should check the equipment and accessories to verify t hat each item is in the carton an d that each item is undamaged.
4021192 Rev B 15 Front Panel Description Front Panel Description The front panel of your residential gatew ay provides LED status indicators that indicate how well and at what state your resid ential gateway is operating.
16 4021192 Rev B Back Panel Description Back Panel Description The following illustrations sh ow the description and function of the back panel components on the Cisco DPC3925 residential gateway.
4021192 Rev B 17 Back Panel Description 8 WIRELESS SETUP — Pressing t his switch initiates wireless setup, this feature allows the user to add new W i- Fi Protected Setup (WPS) compliant wireles s clients to the home network 9 RESET — A momentary pressing (1 -2 seconds) of this switch reboots the EMTA.
18 4021192 Rev B What Are the System Requiremen ts for Internet Service? What Are the System Requirements for Internet Ser vice? To ensure that your residential ga teway operates efficiently for high .
4021192 Rev B 19 How Do I Subscribe to High-Speed I nternet and Telephone Service? How Do I Subscribe to High-Speed Inte rnet and Telephone Service? Before you can use your residential ga teway, you need to have a high -speed Internet access account.
20 4021192 Rev B How Do I Subscribe to High-Speed I nternet and Telephone Service? I A l r e a d y H a v e a n E x i s t i n g H i g h - S p e e d I n t e r n e t A c c e s s A c c o u n t If you have.
4021192 Rev B 21 Where Is the Best Location for My DOCSIS Residential Gateway? Where Is the Best Location for My DOCSIS Residential Gateway? The ideal location for your residential g ateway is where it has access to outlets and other devices.
22 4021192 Rev B How Do I Mount the Modem on a Wal l? (Optional) How Do I Mount the Modem on a Wall? (Opti onal) You can mount the residential gateway o n a wall using two wall anchors, two screws, and the mounting slots located on the unit. The modem can be mounted vertically or horizontally.
4021192 Rev B 23 How Do I Mount the Modem on a Wall? (Optional) L o c a t i o n a nd D i m e n s i o n s of t h e W a l l - M o u n t in g S l o t s The following illustration shows the location and dimensions of the w all-mounting slots on the bottom of the modem.
24 4021192 Rev B How Do I Mount the Modem on a Wal l? (Optional) M o u n t i n g t h e R e s i d e n t i al G a t e w a y o n a W al l 1 Using a drill with a 3/16-inch bit, d rill two holes at the same height and 4 inch es apart. Note: The preceding graphic illustra tes the location of the mounting holes on the back of the residential gateway .
4021192 Rev B 25 What Are the Requirements for Telephone Service? What Are the Requirements for Telephone Service ? N u m b e r o f T e l e p ho n e D e v i c e s The RJ-11 telephone-style connectors on the residential gateway can each provide telephone service to multiple telephon es, fax machines, and analog modems.
26 4021192 Rev B How Do I Connect My Gateway for In ternet and Telephone Service? How Do I Connect My Gateway for Internet an d Telephone Service? You can use your residential gate way to provide both telephone service and to provide Internet access, and you can share that Internet connection with other Internet devices in your home or office.
4021192 Rev B 27 How Do I Connect My Gateway for In ternet and Telephone Serv ice? WARNING: To avoid personal injury, follow the installation instructions in the exact order shown. To prevent possible dam age to equipment, disconnec t any other telephone service before connecting your c able modem to the s ame wires.
28 4021192 Rev B How Do I Connect My Gateway for In ternet and Telephone Service? 5 Connect one end of a telephon e jumper cable (not included) to a teleph one outlet in your home or to a telephone or fax ma chine. Then connect the other end of the jumper cable to the appropriate RJ - 11 TELEPHONE port on the back of the residential gateway.
4021192 Rev B 29 How Do I Configure My DOCSI S Residential Gateway? How Do I Configure My DOCSIS Resi dential Gateway? To configure your residential ga teway, you must first access the WebWizard configuration pages.
30 4021192 Rev B How Do I Configure My DOCSIS Res idential Gateway? 2 In the address field, enter the following IP address: 192.16 8.0.1 . A Status DOCSIS WAN login page similar to the following page opens. 3 On the Status DOCSIS WAN pag e, leave the User Name and Password field blank and click Log In .
4021192 Rev B 31 How Do I Configure My DOCSI S Residential Gateway? 4 On the Administration Manageme nt page, create a User Name and Password and then click Save Setti ngs . Once you save the settings for your User Nam e and Password on the Administration Manage ment page, the Setup Quick Setup page opens.
32 4021192 Rev B How Do I Configure My DOCSIS Residen tial Gateway? Configuring Quick Settings Use the descriptions and instructions in t he following table to configure the network settings for the device. After you m ake your selections, click Sa ve Settings to apply your changes or click Cancel Cha nges to cancel.
4021192 Rev B 33 How Do I Configure My DOCSI S Residential Gateway? Section Field Description WLAN Wireless Network Allows you to enable or disabl e the wireless network. Select the desired option: Enable Disable Wireless Network Name (SSID) Allows you to enter a n ame for your wireless network or to use the default value.
34 4021192 Rev B How Do I Configure My DOCSIS Res idential Gateway? S e t up > L a n S e t u p The Setup Lan Setup page allows you to con figure the settings for the Local Area Network (LAN) in your home.
4021192 Rev B 35 How Do I Configure My DOCSI S Residential Gateway? Section Field Description Network Address Server Settings (DHCP) DHCP Server Allows you to enable or disabl e the DHCP server in the residential gateway. The D HCP server is used to automatica lly allocate IP addresses to devices as they are attached to your hom e network.
36 4021192 Rev B How Do I Configure My DOCSIS Res idential Gateway? Section Field Description Maximum Number of DHCP Users Enter the maximum number of us ers to which the DHCP server can assign IP addresses for use in the LAN. This number cannot be greater than 254 minus the startin g IP address described above.
4021192 Rev B 37 How Do I Configure My DOCSIS Res idential Gateway? Section Field Description DDNS Service Disabling DDNS (Factor y Default Settings) To disable DDNS, select Disabl ed from the drop-down list an d click Save Settings .
38 4021192 Rev B Configure Wireless Settings Configure Wireless Settings This section describes the options available from the Wireless pages that you can use to configure the parameters of the WAP to m eet your specific requirements and needs.
4021192 Rev B 39 Configure Wireless Settings Wireless Configuration Wi-Fi Protected Setup Example Wireless Configuration Wi-Fi Protected Se tup Page Description Use the descriptions and instructions in t he following table to configure the basic settings for Wi-Fi Protected Se tup for the residential gateway.
40 4021192 Rev B Configure Wireless Settings Section Field Description WPS Setup Using Your Wi-Fi Adapter PIN (Option 2) This is the most secure opt ion to register a wireless client with the gateway. You need the Wi-Fi P rotected Setup PIN number, which is found in the client Wi-Fi Prot ected Setup utility.
4021192 Rev B 41 Configure Wireless Settings Section Field Description Basic Settings Wireless Network Enable or Disable the wireless net work Wireless Configuration The default is WPS . See Wi -Fi Protected Setup (WPS ) (on page 38 ) for more information about using W PS.
42 4021192 Rev B Configure Wireless Settings Section Field Description Wireless Network Name ( SSID ) The SSID is the name of y our wireless network. The SSID is used by wireless technology to identify your netw ork from other wireless networ ks in the area.
4021192 Rev B 43 Configure Wireless Settings Wireless Security Page Description Use the descriptions and instru ctions in the following table to configure the wireless security for the residential gatew ay. After you make your selections, click Save Settings to apply your chang es or Cancel Changes to cancel.
44 4021192 Rev B Configure Wireless Settings Section Field Description WPA Security for Personal Networks – WPA or WPA2 Person al Modes Wi-Fi Protected Access (WPA) is a more secure wireless technolo gy than WEP . WPA can be used for both Enterprise (corporate app lications) and Personal (home n etwork) wireless networks.
4021192 Rev B 45 Configure Wireless Settings Section Field Description Security for Enterprise N etworks - WPA-Enterprise Modes This option features WPA used in coordination with a RADIU S server for client authent ication. (This should only be used when a RADIUS server is connected to t he device.
46 4021192 Rev B Configure Wireless Settings W i r e l e s s > M A C F i l t e r The MAC Filter feature is used to e ither allow or block access to your wireless LAN based on the MAC Address of the w ireless client devices.
4021192 Rev B 47 Configure Wireless Settings Section Field Description Access Restriction Access Restriction Allows you to permit or b lock computers from acce ssing the wireless network. The choice that you ma ke here affects the ad dresses listed on this page.
48 4021192 Rev B Configure Wireless Settings Wireless Advanced Settings Page Description Use the descriptions and instructions in the following table to configure the advanced wireless settings for your residen tial gateway. After you make your selections, click Save Settings to apply your changes or Cancel Changes to cancel.
4021192 Rev B 49 Configure Wireless Settings Section Field Description Advanced Wireless N Transmission Rate The rate of data transmissi on should be set dependin g on the speed of your Wireless-N networking.
50 4021192 Rev B Configure Wireless Settings Section Field Description DTIM Interval The Delivery Traffic Indicat ion Message (DTIM) indicates the interval between Broadcasts/Multicast tran smissions. DTIM field is a countdown field informing clients of the next window for listening to broadcast an d multicast messages.
4021192 Rev B 51 Configure Wireless Settings W i r e l e s s > W D S S e t t i n g s The Wireless Distribution System (WDS) Settings page allows you to expand the coverage of your wireless network by deploying s ignal repeaters. Make sure the channel settings are the same for a ll WDS enabled devices.
52 4021192 Rev B Configure Wireless Settings W i r e l e s s > Q o S Quality of Service (QoS) ens ures better service to high-priority type s of network traffic, which may involve dema nding, real-time applications , such as video conferencing. QoS settings allow you to spe cify priorities for different types of traffic.
4021192 Rev B 53 Configure Wireless Settings Section Field Description No ACK Allows you to enable or disabl e NO ACK. This feature is recommended for data ser vices where transmission is important and packet loss is tol erable to a certain deg ree. If you select Disable , an ack nowledge packet is returned for every packet received.
54 4021192 Rev B Configure Security Configure Security S e c ur i t y > F i r e w a l l Advanced firewall technology det ers hackers and protects the home network from unauthorized access. Use this page to configure a firewall that can filter out various types of unwanted traffic on the gateway’s local network.
4021192 Rev B 55 Configure Security Section Field Description Filters Filter Proxy Enables/disables filter proxy. If loc al users have access to W AN proxy servers, they may be able to circumvent the content filters and access Internet s ites blocked by the device.
56 4021192 Rev B Configure Security S e c ur i t y > V P N P a s s t h r o u g h Use this page to configure Virtual Private Network (VPN) support. Ena bling the settings on this page allows VPN tunnels usin g IPsec or PPTP protocols to pass through the gateway's firewa ll.
4021192 Rev B 57 Configure Security S e c ur i t y > V P N A Virtual Private Network (VPN) is a con nection between two endpoints in different networks that allows private data to be sent securely over public networks or other private networks. This is accomplishe d by creating a "VPN tunnel.
58 4021192 Rev B Configure Security Security VPN Tunnel Page Description Use the descriptions and instructions in t he following table to configure the VPN tunnel for your gateway. After you make your selections, click Save Settings to apply your changes or Cancel Cha nges to cancel.
4021192 Rev B 59 Configure Security Section Field Description Remote Secure Gateway Select the desired option, IP Addr . , Any , or FQDN . If the remote g ateway has a dynamic IP address, select Any or FQDN . If Any is selected, then the Gateway will accept requests from any IP addres s.
60 4021192 Rev B Configure Security Section Field Description Key Management (continued) Select one of the following opt ions for the key exchange method: Auto (IKE) – Encryption: The Encryption m ethod determines the length o f the key used to encrypt/decrypt ESP packets .
4021192 Rev B 61 Configure Security Section Field Description Status This field shows the conne ction status for the selecte d tunnel. The state is either Connected or Disconnected . Buttons Connect Click this button to establish a conn ection for the current VP N tunnel.
62 4021192 Rev B Configure Security View Log The Security VPN View Log page shows events captured by the firewall. The log displays the following items: Description of the event Number of even.
4021192 Rev B 63 Control Access to the Gate way Control Access to the Gateway A c c es s R e s t r i c t i o n s > I P A d d r e s s F i l t er i n g Use the Access Restrictions IP Filtering page to configure IP address filters. These filters block a range of IP addresses from a ccessing the Internet.
64 4021192 Rev B Control Access to the Gateway Select the MAC Address Filtering tab to open the Access Restrictions MAC Address Filtering page. The Block/Pass drop down menu a llows you to block or pass Internet access to the MAC addresses of the devices you li st in the MAC Address Filters table.
4021192 Rev B 65 Control Access to the Gate way A c c es s R e s t r i c t i o n s > B a si c R u l e s Access restrictions allow you to block or a llow specific kinds of Internet usage and traffic, such as Internet access, des ignated applications, websites, and inbound traffic during specific days and times.
66 4021192 Rev B Control Access to the Gateway Use the descriptions and instructions in t he following table to configure th e access restrictions basic rules for your residential ga teway. After you make your selections, click Save Settings to apply your cha nges or Cancel Changes to can cel.
4021192 Rev B 67 Control Access to the Gate way Section Field Description Override the Password Password Allows you to create a pas sword to temporarily override user access restrictions to a b locked.
68 4021192 Rev B Control Access to the Gateway Use the Keyword List to ent er the keywords you wish to block. If any of these keywords appears in the URL of a website, access to the site will be blocked. Note that only the URL is check, not the content of each webpage.
4021192 Rev B 69 Control Access to the Gate way Section Field Description Tod Filter Add Allows you to add a new Time of Day access filter or rule. Enter the name of the filter and click the Add key to add the filter to the list. Time of Day ru les are used to restrict I nternet access based on the day and time.
70 4021192 Rev B Control Access to the Gateway Access Restrictions User Setup Page Description Use the descriptions and instructions in t he following table to configure the use r setup for your residential gatew ay. After you make your selections, click Save Settings to apply your changes or Cancel Changes to cancel.
4021192 Rev B 71 Control Access to the Gate way Section Field Description Inactivity Time 60 minutes [F actory def ault when a user is cre ated. Otherwise, it is 0 (zero) ]. Enter the amount of time durin g a user session where there is no Internet access activity, indicating that the user is n o longer online.
72 4021192 Rev B Configure Applications and Gaming Configure Applications and Gaming O v e r v i ew Most well-known Internet applications are supported by Application Layer Gateways (ALGs). ALGs automatically adjust the gateway firewall to allow data to pass without making any custom settings.
4021192 Rev B 73 Configure Applications and Gaming Section Field Description Port Filtering Start Port: This is the beginning of the port ran ge. Enter the beginning of the range of port numbers (external ports) used by the server or Internet application.
74 4021192 Rev B Configure Applications and Gaming Applications and Gaming Port Range Forward Page De scription Use the descriptions and instructions in t he following table to configure the port range forwarding for the residential ga teway. Select enable for each.
4021192 Rev B 75 Configure Applications and Gaming A p p li c a t i o n s & G a m i n g > P o r t R a n g e T r i g g e r i n g Port range triggering is a way t o dynamically forward ports to a LAN PC that needs them at a particular time.
76 4021192 Rev B Configure Applications and Gaming Section Field Description End Port For the End port, select a p ort from the recommended 49152 - 65535 range. Keep in mind that ports used are program speci fic so check which ones the program requires to be forwarded.
4021192 Rev B 77 Configure Applications and Gaming Applications and Gaming DMZ Page Description Use the descriptions and instructions in t he following table to configure the port range triggering for the resident ial gateway. Select enable for each DMZ Host IP address.
78 4021192 Rev B Manage the Gateway Manage the Gateway A d m i n i s t r a t i o n > M a n a g e m e n t The Administration Management page allows the network’s adminis trator to manage specific gateway functions for access and security. Select the Manage ment tab to open the Administration Ma nagement page.
4021192 Rev B 79 Manage the Gateway Field Description Gateway Setup (WAN) Internet Connection Type Connection Mode This sett ing allows you to determine how the WAN (or gateway interface to t he Internet) obtains its IP address.
80 4021192 Rev B Manage the Gateway Field Description MTU Gateway Access Local Access Internet IP Address Enter the gateway’s IP address (as seen from the Internet) Subnet Mask Enter the gateway’s.
4021192 Rev B 81 Manage the Gateway Field Description Remote Access Remote Management Allows you to enable to d isable remote management. This feature allows you to access and manage yo ur gateway settings from the Internet when you are aw ay from home.
82 4021192 Rev B Manage the Gateway A d m i n i s t r a t i o n > R e p o r t i n g Administration reporting allows you t o em ail various system activities to your email address.
4021192 Rev B 83 Manage the Gateway V i e w L o g To view the logs, complete the following st eps. 1 Click View Log . A new window ope ns with the log data page .
84 4021192 Rev B Manage the Gateway A d m i n i s t r a t i o n > D i a g n o s t i c s Administration diagnostics allow you to check th e status of your Internet connection by using a Ping test. Select the Diagnostics tab to open the Adminis tration Diagnostics page.
4021192 Rev B 85 Manage the Gateway A d m i n i s t r a t i o n > B a c k u p & R e s t o r e Administration Backup & Restore allows you to back up you configuration of the Gateway and store it on your computer. You can use this file to restore a prev iously saved configuration for your Gateway .
86 4021192 Rev B Manage the Gateway A d m i n i s t r a t i o n > Fa c t o r y D e f a u l t s The Administration Factory Defaults pa ge allows you to restore the configuration to its factory default settings. Select the Factory Defaults tab to open the Administration Factory Defaults page.
4021192 Rev B 87 Monitor Gateway Status Monitor Gateway Status This section describes the options available under the Status tab that you can use to monitor the status of the residential ga teway and to perform diagnost ics on the device and the network.
88 4021192 Rev B Monitor Gateway Status Section Field Description Internet Connection IP Address Displays the IP address of t he WAN interface. This address is assigned to the gateway when it goes online. Subnet Mask Displays the subnet mask for your WA N port.
4021192 Rev B 89 Monitor Gateway Status Section Field Description A MAC address is a hard ware address that uniquely identifies e ach node of a network.
90 4021192 Rev B Monitor Gateway Status ARP/RARP Table Click ARP/RARP Table to see a comp let e list of all devices th at are connected to your network . To retrieve the most up- to -date information, click Refresh . To exit this page and return to the Local Network page, click Close .
4021192 Rev B 91 Monitor Gateway Status Status Wireless Page Description Use the following table to review the st atus of your wireless network. Section Field Description Wireless Network MAC Address .
92 4021192 Rev B Monitor Gateway Status S t a t u s > D O C S I S W A N DOCSIS WAN Status displays information about the system of your cable modem . Select the DOCSIS WAN tab to open t he Status DOCSIS WAN page. DOCSIS WAN Page Description Use the descriptions in the following table to review the status of your DOCSIS WAN network.
4021192 Rev B 93 Monitor Gateway Status Section Field Description MAC Address (CM MAC Addr ess) Displays the CM MAC Address . The CM MAC Address is a un ique alphanumeric address for the cable modem coaxial i nterface, which is used to connect to the CMTS at the hea dend.
94 4021192 Rev B Frequently Asked Questions Frequently Asked Questions Q . H o w D o I C o n f i g u r e T C P / IP P r o t o c o l ? A. To configure TCP/IP protocol, you ne ed to have an Ethernet Network Interface Card (NIC) with TCP/IP communicat ions protocol installed on your syste m.
4021192 Rev B 95 Frequently Asked Questions 5 Select both Obtain an IP address a utomatically and Obtain DNS server ad dress automatically in the Internet Protocol (TCP/IP) Properties window, and then click OK . 6 Click Yes to restart your computer w hen the Local Network window opens.
96 4021192 Rev B Frequently Asked Questions Renewing the IP Address on Windows 95, 98, 98SE, and ME Sy stems 1 Click Start , and then click Run to open the Run window. 2 Type winipcfg in the Open field, and click OK to execute the w inipcfg command. The IP Configuration window opens.
4021192 Rev B 97 Frequently Asked Questions Q. How does the residential gateway connect to my computer? A. The residential gateway co nnects to the PC using a wireless connection or the 10/ 100/1000BASE-T Ethernet port on your PC.
98 4021192 Rev B Tips for Improved Performanc e Tips for Improved Perf ormance C h e ck a n d C o r r e c t If your residential gateway doe s not perform as expected, the following tips may help. If you need further assistance , contact your service provider.
4021192 Rev B Front Panel LED Status Indica tor Functions Front Panel LED Status Indicator Functions I n i t i a l P o w e r U p , C a l i b r a t i o n , a n d R e g i s t r a t i o n ( A C P o w e r.
100 4021192 Rev B Front Panel LED Status Indica tor Functions Front Panel LED Status Indicato rs During Initial Po wer Up, Calibration, and Registration Part 2, Telephone Registration Step 7 8 9 10 11.
4021192 Rev B Front Panel LED Status Indica tor Functions N o r ma l O p e r a t io n s ( A C P o w e r a p p l i e d) The following chart illustrates the appearance of the residential gateway front pan el LED status indicators during normal operation s when AC power is applied to the gateway.
102 4021192 Rev B Front Panel LED Status Indica tor Functions S p e ci a l C o n d i t i o n s The following chart describes the appearance of the cable modem front panel LED status indicators during special conditions t o show when you have been denied network access.
4021192 Rev B 103 Notices Notices T r a d e m a r k s Cisco and the Cisco logo are trademarks o r registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. A listing of Cisco's tradema rks can be found at www.cisco.com/go/trademarks .
104 4021192 Rev B Notices The firmware in this equipment is protecte d by copyright law. You may only use the firmware in the equipment in which it is provide d. Any reproduction or distribution of this firmware, or any portion of it, with out our express written consent is prohibited.
4021192 Rev B 105 For Information For Information I f Y o u H a v e Q u e s t i o n s If you have technical questions, call Cisco Services for assistance. Follow the menu options to speak with a service engine er. Access your company's extranet site to view or order a dditional technical publications.
Cisco Systems, Inc. 5030 Sugarloaf Parkway, Box 465447 Lawrenceville, GA 30042 678 277 - 1120 800 722 - 2009 www.cisco.com This document includes various trademarks of Cisco Systems, Inc. Please see the Noti ces section of this document for a list of the Cis co Systems, Inc.
An important point after buying a device Cisco Systems DPC3925 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Cisco Systems DPC3925 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Cisco Systems DPC3925 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Cisco Systems DPC3925 you will learn all the available features of the product, as well as information on its operation. The information that you get Cisco Systems DPC3925 will certainly help you make a decision on the purchase.
If you already are a holder of Cisco Systems DPC3925, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Cisco Systems DPC3925.
However, one of the most important roles played by the user manual is to help in solving problems with Cisco Systems DPC3925. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Cisco Systems DPC3925 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
