Wellink Corporation W202ER-4 Manual Do Utilizador

141 

Troubleshooting 

This appendix suggests solutions for problems you may encounter 
in installing or using the VisionNet 202ER-4, and provides 
instructions for using several IP utilities to diagnose problems.  

Contact Customer Support if these suggestions do not resolve the 
problem. 

 

Verify that you are using the power cable provided 
with the device and that it is securely connected to 
the VisionNet 202ER-4 and a wall socket/power 
strip. 

Verify that a standard telephone cable like the one 
provided is securely connected to the ADSL port and 
your wall phone jack. Wait 30 seconds to allow the 
device to negotiate a connection with your ISP. 

Verify that the Ethernet cable is securely connected 
to your LAN hub or PC and to the VisionNet 202ER-
4. Make sure the PC and/or hub is turned on. 
Verify that you are using a straight-through type 
Ethernet cable to the uplink port on a hub or a cross-
over type cable to a stand-alone PC. If you 
connected the device to an ordinary hub port (not 
Uplink), you must use a straight-through cable. (Hold 
the connectors at each end of the cable side-by-side 
in the same position. If the order of their color-coded 
wire pairs is the same, it is a straight-through type.)

 

Contact Customer Support if your cable is not the 
correct type. 
Verify that your cable is sufficient for your network 
requirements. A 100 Mbit/sec network (10BaseTx) 
should use cables labeled Cat 5. 10Mbit/sec cables 
may tolerate lower quality cables. 

The DIAG LED should turn off after about 10-15 
seconds. If it does not, turn off the VisionNet 202ER-
4, wait 10 seconds, and then turn it back on.  

PC cannot access Internet

Use the ping utility, discussed in the following 
section, to check whether your PC can communicate 
with the VisionNet 202ER-4’s LAN IP address (by 
default 10.0.0.2). If it cannot, check the Ethernet 
cabling.  
 
If you statically assigned a private IP address to the 
computer, (not a registered public address), verify 
the following: 

•  Check that the gateway IP address on the 

computer is your public IP address (see the 
Quick Start chapter, Part 2 for instructions on 
viewing the IP information.) If it is not, correct 
the address or configure the PC to receive IP 
information automatically. 

•  Verify with your ISP that the DNS server 

specified for the PC is valid. Correct the address 
or configure the PC to receive this information 
automatically. 

•  Verify that a Network Address Translation rule