Operation Manual

54
Troubleshooting Guide
The Troubleshooting Guide provides answers to common problems regarding the TDM-C504 ADSL2/2+
Modem Router settings, connections, and computer settings.
1. The TDM-C504 ADSL2/2+ Modem Router does not work (None of the LEDs light up)
Ans.Check the following:
1. Make sure that the TDM-C504 ADSL2/2+ Modem Router is plugged into a power socket.
2. Make sure that you are using the correct power supply for your TDM-C504 ADSL2/2+ Modem
Router device.
3. Make sure the power switch on the TDM-C504 ADSL2/2+ Modem Router is turned on.
2. I changed the LAN IP Address in the LAN configuration page and my PC is no longer able to
detect the TDM-C504 ADSL2/2+ Modem Router.
Ans. After changing the LAN IP Address of the TDM-C504 ADSL2/2+ Modem Router, proceed to the
following step before a PC is able to recognize the TDM-C504 ADSL2/2+ Modem Router:
1. Click “Start” Æ “Run”.
2. In the open field, enter “cmd” then click “OK”.
3. In the command prompt, type “ipconfig/release” then press “Enter”.
4. Type “ipconfig/renew” then press “Enter”.
3. LAN (Link/Act) LED does not light up.
Ans. Check the following:
1. Make sure that the LAN cables are securely connected to the 10/100Base-T port.
2. Make sure that you are using the correct cable type for your Ethernet equipment.
3. Make sure the computer's Ethernet port is configured for auto-negotiation.
4. Failed to configure the TDM-C504 ADSL2/2+ Modem Router through web browser (By a client PC in
LAN)
Ans.Check the following:
1. Check the hardware connection of the TDM-C504 ADSL2/2+ Modem Router’s LAN port. The LED
will lit when a proper connection is made.
2. Check your Windows TCP/IP setting (Refer to Chapter 3 for setting details).
3. Open the Windows System Command Prompt:
 For Windows 9x/ME: Manually enter winipcfg, then press Enter.
 For Windows 2000/XP/Vista/Windows 7: Manually enter ipconfig/all, then press Enter.
4. You should have the following information listed on your Window System:
 IP Address: 192.168.1.x
 Subnet mask: 255.255.255.0
 Default Gateway IP: 192.168.1.1
5. I forgot or lost my Administrator Password.
Ans.Reset the TDM-C504 ADSL2/2+ Modem Router to factory default by pressing the “Reset”
button for more than 5 seconds.
6. I need to upgrade the Firmware.
Ans. In order to upgrade the Firmware with the latest features, check your local dealer or ISP for
technical support. Before proceed the upgrading process, check the following details:
1. Download the latest Firmware and save at your pointed location.