LINE - This will light if an ISDN line is connected. If after
attempting an Internet connection, this light is off, there may be a problem with the
cabling between the router and the ISDN wall socket or a fault with the ISDN line itself.
LAN / RXD / TXD - These lights refer to the Local Area Network. The
LAN LED will light when the router can see the ethernet and the RXD/TXD lights will flash
when data is received and transmitted on the ethernet interface.
CH1 - An ISDN call is being made on the first ISDN B-channel.
CH1 RXD / TXD - Data is being received or transmitted along this
ISDN channel
CH2 - An ISDN call is being made on the second ISDN B-channel.
CH2 RXD / TXD - Data is being received or transmitted along this ISDN channel