3Com 3C840 - Manual (Page 154)

13-6 C HAPTER 13: T ROUBLESHOOTING
WAN Connection
Problems
Symptom Possible Causes Corrective Action
SDSL LED is Off.
OfficeConnect Remote
840 Manager Interface
Status indicates that
interface atm:1/hdlc:1
is down. WAN (modem) cable
is not connected. Check that one end of the WAN
cable is fully plugged into the wall.
Check that the other end is fully
plugged into the SDSL port in the
back of the OfficeConnect Remote
840.
WAN cable has been
damaged. Replace the cable with another DSL
cable.
There is a problem at
the other end of the
SDSL connection that
causes the SDSL
negotiation to fail. Contact your service provider.
SDSL LED is Off or
goes On briefly then
turns Off. SDSL link is down. Contact your service provider.
OfficeConnect Remote
840 Manager ATM
status cell delineation
fails and no idle cells
are being received. SDSL link is down. Contact your service provider.
There is a problem at
the central office
equipment (the other
end of the SDSL line)
such that no idle cells
are being transmitted
or there is a corrupt
line. Report the problem to your service
provider.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM