Specifications

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TROUBLESHOOTING INSTALLATION ISSUES
This chapter outlines the most common installation problems for the DX-120, and provides a corrective action
addressing each issue.
Corrupted Database on Initial System Setup
SOLUTION: DX-120 POWER-UP INITIALIZATION
You must successfully initialize the DX-120 system during start up procedures for the system to operate properly.
NOTE
The installation of the DX-120 is complete only when you perform this critical
initialization/cold start operation - see “Power-up Initialization (Cold Start)” on
page 72.
• You must also initialize/cold start the DX-120 system after adding any new hardware in KSU1 or KSU2. If you
are adding new hardware, go to see “Adding Hardware to an Existing System” .
• When you initialize the DX-120, the system establishes and organizes an operational customer database—
the system uses this database organization for future system updates.
• When the system completes the initialization process, it loads the default database contents into memory; the
system is then ready to run with this database configuration.
• You can later make custom changes to the database using appropriate program settings for the various
features.
HINT
• For details about the initialization process, see “Power-up Initialization (Cold
Start)” on page 72.
• If you have previously entered programming information into the DX-120
database, perform the procedure in
“Adding Hardware to an Existing System”
on page 113.
Adding Hardware to an Existing System
SOLUTION: FOLLOW THE STEPS REQUIRED WHEN
ADDING HARDWARE TO AN EXISTING SYSTEM.
When you add any optional expansion/circuit modules, COM4, DPM8, DPM16, APM4, T1, ISDN (T1/PRI), In-Skin
Voicemail, AAM or Modem, to either KSU1 or KSU2, you must follow certain procedures to ensure the DX-120
configures itself properly with the newly added equipment. These procedures include performing a cold start/
initialization.
CAUTION
If your customer’s DX-120 switch uses a customized database, be sure to take
these measures first to back up that database.
NOTE
If you program using the DET instead of PC-DBA, you cannot save the custom
database; you will have to re-program the custom settings after performing the
cold start. For further details on DX-120 programming options, see the DX-120
Technical Manual, Volume II, Programming.
Adding Hardware to an Existing System (continued on next page)
SECTION 4 - INSTALLATION ISSUES
DX-120 Installation and Maintenance Manual