K-Patents PR-21-S - Manual (Page 113)

11 Ethernet connection specification 107
Figure 11.8 Ping OK.
Figure 11.9 Ping error message.
First open the DTR cover and front panel and check the diagnostic LEDs of the
Ethernet connector (see Section 11.1.2). Note: Keep both the DTR and your com-
puter powered while you check the diagnostic LEDs.
If you cannot see any LED lights, something is physically wrong with your connec-
tion. Check the following
− both the DTR and the device in the other end of the cable are powered on
− the Ethernet cable is properly inserted in both ends
− the Ethernet cable is of the correct type (cross-over cable for direct DTR-to-
computer connection)
If the green LED is lit, your Ethernet connection is made correctly with the right
type of cable. In this case, try pinging the DTR and check if the orange LED flashes
during ping.
If the LED does not flash, re-check the IP address (so that you are really pinging the
DTR in question). In case the DTR is not connected directly to the computer, there
may be a routing problem. Please consult your network administrator to solve the
problem.
Note: A firewall software (especially that of Windows XP) with tight settings may
stop you from connecting to a DTR. If you are connecting directly to the DTR (and
not in a network), the easiest way of solving this problem is to turn off the firewall