Cisco Router DPC3208 User Manual

							 
 
 Installation Preparations 
 
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Note: Image not to scale. 
  
Mounting the Cable Modem on a Wall 
1 Using a drill with a 3/16-inch bit, drill two holes at the same height and 4 inches 
apart. 
Note: The preceding graphic illustrates the location of the mounting holes on the 
back of the cable modem. 
2 Are you mounting the cable modem into a drywall or concrete surface where a 
wooden stud is available? 
 If yes, go to step 3. 
 If no, drive the anchor bolts into the wall, and install the mounting screws 
into the anchor bolts; leave a gap of about 1/4-inch between the screw head 
and the wall. Then, go to step 4. 
3 Install the mounting screws into the wall; leave a gap of about 1/4-inch between 
the screw head and the wall. Then, go to step 4. 
4 Verify that no cables or wires are connected to the cable modem. 
5 Lift the cable modem into position. Slip the large end of both mounting slots 
(located in the back of the cable modem) over the mounting screws, and then 
slide the cable modem down until the narrow end of the keyhole slot contacts the 
screw shaft. 
Important: Verify that the mounting screws securely support the cable modem 
before you release the unit. 
  
						

							 
Chapter 2    Installing the DOCSIS Cable Modem  
 
 
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Install the Cable Modem 
This section describes how to connect your cable modem to support the services that 
the cable modem offers.    
Connect Devices to the Cable Modem 
The following illustration shows all of the possible connections that can be made to 
your cable modem for various services. Although your model may not support all of 
the services pictured, you can determine which services your model supports by 
referring to the Benefits and Features list in Introduction (on page 2). 
Note: Professional installation may be available. Contact your local service provider 
for further assistance. 
  
Connect the Cable Modem 
The following installation procedure ensures proper setup and configuration for the 
cable modem. 
1 Choose an appropriate and safe location to install the cable modem (close to a 
power source, an active cable connection, your PC—if using high-speed Internet, 
and your telephone lines—if using VoIP). For assistance, go to Where Is the Best 
Location for My Cable Modem? (on page 13).  
						

							 
 
 Install the Cable Modem 
 
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  WARNING: 
 To prevent possible damage to equipment, disconnect any other telephone 
service before connecting your cable modem to the same wires.  
 Hazardous electrical voltages can exist on the telephone, Ethernet, or coax 
cable wiring. Be sure to disconnect AC power from all devices while 
installing your service. 
 All wiring and connections must be properly insulated to prevent 
electrical shock.  
 Telephone connections to an installed home telephone wiring network 
should be done by a qualified installer. The cable telephone service 
provider may offer professional installation and connection to the home 
telephone wiring network. A fee may be charged for this service. 
2 Power off your PC and other networking device; then, unplug them from the 
power source. 
3 Connect the active RF coaxial cable from your service provider to the coax 
connector labeled CABLE on the back of the cable modem. 
Note: To connect a TV, DHCT, set-top, or VCR from the same cable connection, 
you will need to install a cable signal splitter (not included). Always check with 
your service provider before using a splitter as a splitter may degrade the signal. 
4 Connect your PC to the cable modem by connecting one end of the yellow 
Ethernet cable to the Ethernet port on your PC, and the other end to the yellow 
ETHERNET port on the back of the cable modem. 
Note: To install more than one Ethernet device on a cable modem that has only 
one Ethernet port, use an external multi-port Ethernet switch(s) or cable router 
(not provided). 
5 If  your cable modem supports digital telephone service (VoIP), connect one end 
of a telephone jumper cable (not included) to a telephone outlet in your home or 
to a telephone or fax machine.  Then connect the other end of the jumper cable to 
the appropriate RJ-11 TELEPHONE port on the back of the cable modem. The 
telephone ports are light gray and are labeled 1/2 and 2 or 1 and 2 depending on 
the region of the world the cable modem is used. 
Notes: 
– Make sure to connect your telephone service to the correct RJ-11 port.  For 
single line telephone service, connect to port 1/2 or 1. 
– In North America, cable modems have multi-line capability on the RJ-11 
telephone port labeled 1/2.  Line 1 is on pins 3 and 4 of port 1/2, and 
Line 2 is supported on pins 2 and 5.  In Europe, cable modems support 
only one line per port.  Line 1 is on port 1 and line 2 is on port 2. 
– Telephones that require electrical connectors other than RJ-11 may 
require an external adapter (sold separately).  
						

							 
Chapter 2    Installing the DOCSIS Cable Modem  
 
 
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6 Locate the AC power adapter provided with your cable modem. Connect the 
barrel connector end of the power adapter into the power input on the back of 
the cable modem. Then, plug the AC power adapter into an AC outlet to power-
up the cable modem.  
Note: If your Cable Modem is equipped with a power switch (located on the 
back panel), make sure that the switch is in the ON position to power-up the 
Cable Modem.  
The cable modem will perform an automatic search to locate and sign on to the 
broadband data network. This process may take up to 2-5 minutes. The cable 
modem will be ready for use when the POWER, DS, US and ONLINE LEDs on 
the front panel of the cable modem stop blinking and remain on continuously. 
7 Plug in and power on your PC and other home network devices. The LINK LED 
on the cable modem should be on or blinking. 
8 At this point, the installation is complete, and you can begin surfing the Internet. 
Note: If your PC does not have Internet access, refer to How Do I Configure 
TCP/IP Protocol? (on page 32) for information on how to configure your PC for 
TCP/IP.  For Internet devices other than PCs, refer to the DHCP or IP Address 
configuration section of the User Guide or Operations Manual for those devices. 
 
  
						

							 
 
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Introduction 
This section describes the behavior of the front panel indicators when 
the cable modem is first powered up, during normal operations, and 
in special conditions.  
 
 
3 Chapter 3 
Operation of Front Panel 
Indicators 
In This Chapter 
 Initial Power Up, Calibration, and Registration (AC Power 
applied) .................................................................................................. 22 
 Normal Operations (AC Power Applied) ......................................... 24 
 Special Conditions ................................................................................ 25  
						

							 
Chapter 3    Operation of Front Panel Indicators  
 
 
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Initial Power Up, Calibration, and Registration (AC 
Power applied) 
The following chart illustrates the sequence of steps and the corresponding 
appearance of the cable modem front panel LED status indicators during power up, 
calibration, and registration on the network when AC power is applied to the cable 
modem. Use this chart to troubleshoot the power up, calibration, and registration 
process of your cable modem. 
Note: After the cable modem completes Step 7 (Data Network Registration 
Complete), the cable modem proceeds immediately to Normal Operations. See 
Normal Operations (AC Power applied) (on page 24).  
Front Panel LED Status Indicators During Initial Power Up, Calibration, and 
Registration 
 Part 1, High Speed Data Registration 
Step:  1 2 3 4 5 6 
Front Panel  
Indicator 
Self Test Downstream Scan Downstream Signal Lock Ranging Requesting IP Address Request High Speed Data Provisioning File 
1 POWER On  On On On On On 
2 DS On Blinking On On On On 
3 US On Off Off Blinking On On 
4 ONLINE On Off Off Off  Off Blinking 
5 LINK Off On or Blinking On or Blinking On or Blinking On or Blinking On or  Blinking 
6 TEL 1 On Off Off Off  Off Off 
7 TEL 2 On Off Off Off  Off Off 
8 BATTERY  On – When battery is charged 
 Blinks – When battery charge is low 
 Off – When there is no battery in the unit 
 
Front Panel LED Status Indicators During Initial Power Up, Calibration, and 
Registration 
 Part 2, Telephone Registration 
Step:  7 8 9 10 11 
 
Front Panel Indicator Data Network Registration Complete 
Requesting Telephone IP Address 
Request Telephone Provisioning File 
Restarting Voice Service Telephone Registration Complete 
 
1 POWER On  On On On On 
2 DS On On On On On 
3 US On On On On On 
4 ONLINE On On On On On  
						

							 
 
 Initial Power Up, Calibration, and Registration (AC Power applied) 
 
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5 LINK On or Blinking On or Blinking On or Blinking On or Blinking On or Blinking 
6 TEL 1 Off Blinking Off Blinking On 
7 TEL 2 Off Off Blinking Blinking On 
8 BATTERY  On – When battery is charged 
 Blinks – When battery charge is low 
 Off – When there is no battery in the unit 
 
  
						

							 
Chapter 3    Operation of Front Panel Indicators  
 
 
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Normal Operations (AC Power Applied) 
The following chart illustrates the appearance of the cable modem front panel LED 
status indicators during normal operations when AC power is applied to the 
gateway.  
Front Panel LED Status Indicators During Normal Conditions 
Front Panel Indicator Normal Operations 
1 POWER On 
2 DS On 
3 US On 
4 ONLINE On 
5 LINK  On - When the wireless access point is enabled and 
operational 
 Blinks - When data is being transferred between the CPE 
and the wireless home gateway 
 Off - When the wireless access point is disabled by the 
user 
6 TEL 1  On - When telephony service is enabled 
 Blinks - When line 1 is in use 
7 TEl 2  On - When telephony service is enabled 
 Blinks - When line 2 is in use 
8 BATTERY  On - When battery is charged 
 Blinks - When battery charge is low 
 Off - When there is no battery in the unit 
Note: In addition to the status shown in the previous table, some service providers 
use color-coded LEDs to indicate detailed channel bonding and data link status. For 
additional information about color-coded LEDs, check with your service provider. 
  
						

							 
 
 Special Conditions 
 
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Special Conditions 
The following chart describes the appearance of the cable modem front panel LED 
status indicators during special conditions to show when you have been denied 
network access.  
Front Panel LED Status Indicators During Special Conditions 
Front Panel Indicator Network Access Denied 
1 POWER Slow Blinking 
(once per second) 
2 DS Slow Blinking 
(once per second) 
3 US Slow Blinking 
(once per second) 
4 ONLINE Slow Blinking 
(once per second) 
5 LINK On 
6 TEL 1 Off 
7 TEL 2 Off 
8 BATTERY On