LANCOM 1811n Wireless – LANCOM 1821n Wireless
Chapter 10: Advice & assistance
91
EN
A typical problem arises when a Windows PC simultaneously sends and recei-
ves large quantities of data over an asynchronous connection. This situation
can severly impact download speeds. The cause of this is the RCP/IP receive
windows size as defined in the Windows operating system. The default value
is too small for asynchronous connections.
Instructions for increasing the windows size are available in the Knowledge-
Base in the Support area of the LANCOM Systems Web site (
10.3
Unwanted connections under Windows XP
When booting, Windows XP computers attempt to update the time by acces-
sing a time server in the Internet. For this reason, Windows XP computers
booting in the WLAN cause the LANCOM to connect to the Internet.
To prevent Windows XP computers from automatically synchronising the time,
right- click on the time
Change time/date
Internet time
off.
10.4
Cable testing
A cabling defect might have occurred, if no data is transmitted over LAN or
WAN connection, although the configuration of the devices does not show
any discernible errors.
You can test the cabling with the built-in cable tester of your LANCOM.
Change under WEBconfig to menu item
LCOS Menu Tree
Status
LAN
statistics
Cable test
. Enter here the name of the interface to be tested
(e.g. “DSL1” or “LAN-1”). Pay attention to the correct spelling of the inter-
faces. Start the test for the specified interface by clicking on
Execute
.
