Network Router User Manual

Troubleshooting

• On the Internet page, verify that the mobile network signal quality

indicator displays at least two bars. If not, try to move the Ericsson W21

or attach an external antenna.

4.6 No Access to a Certain Internet Application

If you cannot access a certain Internet application or specific type of data,

take the following actions to identify and solve the problem:

• If the application uses FTP or TFTP, check the NAT page to make sure

that the ALG supporting the Internet application is enabled.

• If the application requires UPnP IGD, check that UPnP IDG is enabled

on the NAT page.

• A port forwarding rule might be required for a specific application. See

section

– Port Forwarding. 2.7.3

4.7 No LAN Connection

If you cannot access the local network from a PC that is connected to one

of the LAN ports on the Ericsson W21, or to an Ethernet switch or hub that

is connected to the Ericsson W21, take the following actions to identify and

solve the problem:

• Check that at least one of the LAN connector indicators is green. If not,

check that the Ethernet cable(s) is properly connected.

• Check that the PC is configured to obtain IP address automatically

using DHCP. If not, change the PC’s TCP/IP settings. For instructions,

see section

3.1.1 – Obtain IP Settings Automatically or refer to the

manual of your operating system.

4.8 No Wireless LAN Connection

If you cannot access the local network from a wireless device, take the

following actions to identify and solve the problem:

• Check that the Wireless LAN indicator on front panel of the Ericsson

W21 unit is lit. If not, connect an Ethernet cable between the PC and

the Ericsson W21 to establish a connection. The wired connection is

required for the initial Wireless LAN configuration of the Ericsson W21.

• Verify that the Wireless LAN interface installed on the wireless client is

active.

1/1551-CRH 102 167 Uen Rev D 2007-11-16