User`s guide
6-8 DL3100 User’s Guide—November 1998
6
DL3100 Problems
Table 6-1 is a list of problems with suggested solutions.
Table 6-2 Troubleshooting Guide
Problem Solution
The DL3100 does
not power up.
If the DL3100 is AC powered, make sure it is plugged into a live AC
outlet. If it is DC powered, make sure the respective DC leads are not
crossed.
Check all fuses for opens and replace as needed. If the DL3100 blows
fuses continuously, call Digital Link Technical Support.
You cannot
communicate with
the remote
DL3100.
Verify that the local and remote units have unique node IDs.
Make sure your T3 port LEDs are solid green, indicating that the circuits
are up and running.
Make sure both units are in Multidrop mode.
The TEST LED on
the DL3100 is
constantly on.
Make sure no tests are being initiated and check the Test display from a
terminal.
If a test is running, end it by selecting the test and setting it to Off in the
T3MB, HSDB or HVDB Tests Menus.
Make sure the DTE device or the T3 carrier is not sending loop up and
loop down codes.
The T3 port LEDs
on the DL3100
never illuminate.
Make sure the T3 cable from your service provider is connected to the
DL3100.
Set the DL3100 transmit clock to Internal. Remove the T3 cable from the
affected T3 port and hardloop the DL3100 on the transmit side by
connecting the transmit and receive connectors.
The T3 LEDs on the
DL3100 are
constantly red.
Check the T3 port configuration to make sure the framing and
applications data link are what the carrier is providing.
Check each DL3100 for excessive errors.
Check the T3 cabling or inside wiring for possible problems.
Perform the hardloop procedure on the affected T3 port to verify that the
T3 port is functioning properly.
The DTE port LEDs
on the DL3100 do
not illuminate.
Make sure that the correct T3 cable is connected to the correct T3 port.
If the connected DTE device does not support the
RTS or DTR LEDs,
configure the DL3100 CTS Control to Assert CTS.
The T3 Alarm LEDs
on the DL3100 do
not clear.
Alarm thresholds may have been exceeded for the 15-minute or 24-hour
periods. If other thresholds have not been exceeded, the DL3100
automatically clears these alarms after the period has passed.