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.
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