Vertical IP8024 Installation Guide Page 134

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Symptons & Solutions 8-2
Chapter 8: Troubleshooting
MBX IP Hardware & Installation Guide
PROBLEM CAUSE/SYMPTOM SOLUTION
Hardware
DKT does not operate Bad DTIB circuit Exchange the malfunctioning board
by one in good working condition.
Bad connection between the DSIU
/DTIB12/DTIB24/DTIB12C/DTIB24C
and DKT Terminals
Check the connection between the
SLT and DKT line on MDF, and fix
any mismatching.
Repair any broken connection
between the Board and DKTs.
Installation Distance of DKT and System Check the maximum distance
between the DSIU/DTIB12/DTIB24/
DTIB12C/DTIB24C and the DKT
Bad DKT Plug the DKT into another extension
port that has been verified as
working. If the DKT still does not
work properly, replace the DKT.
CO line operation failure CID/Tone Detection Fail Check the U12/U63 (Voice
processing and Tone detection
device) and MPB.
Bad connection Check all connections.
Expansion KSU does not
operate
Power ON sequence Turn on the Basic KSU after turning
on the Expansion KSU. Then press
the Reset button
Expansion cable connection Check Expansion cable to verify the
connection and its working
condition.
2nd KSU, 3rd KSU PSU OFF Check 1st KSU for Power OFF
Noise on External MOH
(Music on Hold)
and Paging port
Induced noise on the wire between the
System and the amplifier
Make sure a shielded cable is in use
as the connection wire between the
system and the amplifier.
Excessive input level from the external
music source
Decrease the output level of the
external music source by using the
volume control on the music source.
Release 1.7
April 2012
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