Network Device User's Guide DPC2505TM, EPC2505TM

4015259 Rev B 27

Tips for Improved Performance

Check and Correct

If your cable modem does not perform as expected, the following tips may help. If

you need further assistance, contact your service provider.

 Verify that the plug to your cable modem AC power is properly inserted into an

electrical outlet.

 Verify that your cable modem AC power cord is not plugged into an electrical

outlet that is controlled by a wall switch. If a wall switch controls the electrical

outlet, make sure the switch is in the ON position.

 Verify that the POWER and ONLINE LED status indicators on the front panel of

your cable modem are illuminated.

 Verify that your cable service is active and that it supports two-way service.

 Verify that all cables are properly connected, and that you are using the correct

cables.

 Verify that your TCP/IP is properly installed and configured if you are using the

Ethernet connection.

 Verify that you have followed the procedures in How Do I Install USB Drivers?

(on page

21), if you are using the USB connection.

 Verify that you have called your service provider and given them the serial

number and MAC address of your cable modem.

 If you are using a cable signal splitter so that you can connect the cable modem

to other devices, remove the splitter and reconnect the cables so that the cable

modem is connected directly to the cable input. If the cable modem now

functions properly, the cable signal splitter may be defective and may need to be

replaced.

 For best performance over an Ethernet connection, your PC should be equipped

with a 10/100BaseT network interface card.