Network Router User Manual

Troubleshooting

automatically (Auto) or manually change the radio channel currently

used.

• Keep the Ericsson W21 away from electrical devices that disturb the

radio signals, for example microwave ovens.

4.9 Slow or Intermittent Wireless LAN Connection

If your wireless connections to the local network are unacceptable slow or

regularly dropping, take the following actions to identify and solve the

problem:

• Move the Ericsson W21 to another location. Make sure that the mobile

network signal is still acceptable before finalizing the installation.

• Make sure that your Ericsson W21 network does not use the same

radio channel as other wireless devices in the premises, for example

security systems. The radio channel is displayed on the Wireless LAN

page. To avoid interference, let the Ericsson W21 select a channel

automatically (

Auto) or manually change the radio channel currently

used.

• Keep the Ericsson W21 away from electrical devices that disturb the

radio frequency signals, for example microwave ovens.

• Check that the “Transmit power [dBm]” on the Wireless LAN page is

configured in accordance with your requirements on wireless network

coverage. The maximum (default) value is “20”.

4.10 No Access to Shared Files or Printer

If you cannot access a shared storage device or printer connected to the

one of the USB connectors of the Ericsson W21, take the following action

to identify and solve the problem:

• Check that the USB device is detected by the system by looking on the

Event Log web page. Connect the USB device, wait a few seconds

and click the Refresh button. Make sure the “Display” list box is set to

“All”. Move to the bottom of the log using the scroll bar on the right. If

your USB device is recognized you will se some lines like the example

below:

Jan 1 00:07:29 FWT user.info kernel: usb 1-3: new high speed

USB device using ehci_hcd and address 4

Jan 1 00:07:29 FWT user.info kernel: scsi0 : SCSI emulation for

USB Mass Storage devices

Jan 1 00:07:34 FWT user.notice kernel: Vendor:

Model: USB DISK Pro Rev: PMAP

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