LANCOM 3850 UMTS
Chapter 9: Troubleshooting
80
EN
9.2
No DSL connection is established
After start-up the router automatically attempts to connect to the DSL provi-
der. During this process, the DSL-LED will blink green. If successful, the LED
will switch over to steady green. If, however, the connection can't be establis-
hed, the DSL-LED will light up red. The reason for this is usually one of the fol-
lowing:
Problems with the cabling?
Only the cable provided with your device should be used to connect to DSL.
This cable must be connected to the Ethernet port of your broadband access
device. The DSL-LED must light green indicating the physical connection.
Has the correct transfer protocol been selected?
The transfer protocol is set along with the basic settings. The basic setup
wizard will enter the correct settings for numerous DSL providers automati-
cally. Only if your DSL provider is not listed, you will have to enter manually
the protocol being used. In any case, the protocol that your DSL provider sup-
plies you with should definitely work.
You can monitor and correct the protocol settings under:
9.3
DSL data transfer is slow
The data transfer rate of an broadband (Internet) DSL connection is dependent
upon numerous factors, most of which are outside of one's own sphere of
influence. Important factors aside from the bandwidth of one's own Internet
connection are the Internet connection and current load of the desired target.
Numerous other factors involving the Internet itself can also influence the
transfer rate.
Increasing the TCP/IP window size under Windows
If the actual transfer rate of a DSL connection is significantly below the fastest
rate listed by the provider, there are only a few possible causes (apart from the
above-mentioned external factors) which may involve one's own equipment.
Configuration tool
Run command
LANconfig
Management
Interfaces
Interface settings
WAN Inter-
face
WEBconfig
Expert Configuration
Setup
Interfaces
WAN Interface
