363-206-305 Trouble Clearing:
TAP-101
Issue 3, June 2000 Page 9 of 10
DDM-2000 F
IBER
R
EACH
N
ARROWBAND
S
HELF
FE
If only the FE DSXBIU indicator is on, the trouble is in the data link between
the NBS and RT. Replace the following units:
• DT DSXBIU (see second Note in the General section of this TAP).
• Proceed to the RT if trouble did not clear, and quickly replace the DT
Server (with same option settings).
CONFIG
Placement of a channel unit in the wrong slot — This NBS alarm should not be
lit when troubleshooting the DDM-2000 FiberReach
NBS feature because this
indicator lights during craft personnel activity with an DT Server or the CIT at
the RT or when a channel unit is installed at the RT or NBS. If CONFIG and NE
are both lit, the channel unit installation trouble is at the NBS. If CONFIG and
FE are both lit, the channel unit installation trouble is at the RT. If only CONFIG
and no other indicators are lit, first check RT and NBS for channel unit conflict.
Then verify that the NBS contains the DSXBIU if an AUA94 ISDN channel unit
is used. The "CONFIG and NE" alarm pair does not light for a
SLC
-2000 HDT.
Comment: If an AUA94 ISDN channel unit is installed in a valid ISDN slot of
an NBS that contains a quad POTS channel unit in slot 6 or slot
12, the NE and CONFIG LEDs on the DSXBIU will light. In
addition, the FAIL LED on the AUA94 channel unit will light. To
clear this incompatibility alarm, you must remove the ISDN
channel unit. You then must remove the quad POTS channel unit
to clear timeslots for the ISDN D channels (either 23 or 24). After
this, you may reinsert the ISDN channel unit without generating
an alarm. The last channel unit inserted generating the
incompatibility alarm must be removed first.
14. If the trouble condition could not be cleared by circuit pack replacement, refer
to the appropriate schematic drawing for NBS channel bank, or appropriate
applications schematic) to correct NBS wiring trouble.
15. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
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