Product manual

Maintenance, Test and maintenance software

Technical Product Manual - DCT1800-GAP

TD 92093 (1/LZBNB 103 108 R4D) / 2006-03-09/ Ver.C

Fig. 1 Board controllers and peripherals

2.2 Error handling

The test & maintenance software in the CPU, abbreviated to T&M, is activated either upon the reception

of operational faults, or when a test has to be executed. A description of tests that T&M can perform

is found in paragraph

2.3. This paragraph deals with fault handling.

Operational faults and faults detected during tests will cause T&M to start up a fault handling procedure

by which T&M tries to verify and clear the error. Figure

2 shows the different steps of the fault handling

procedure. The two conditions for reception of a fault message cause the start of the flow.

All messages received by T&M are stored in either the info or the fault table. Some messages are of

the category ‘information only’. In that case the message is logged in the info table with the status

code L (logged). In case of a failure, a message will be written in the fault table. When the message

deals with a hard fault, an additional fault report will be written in a third table called service table.

This applies in general for faults causing system performance degradation.

Peripheral

LTC

SPC

LTU,

SPU and SPU-S board

DTC2

DTU board

L2 L1

DTC1

CLU and CLU-S board

Base station

Peripheral

P8 (SPC)

Peripheral

P1 (SPC)

SLU board

CLC

001