Nortel Networks 555-4001-135 Manuale Utente

The self-test checks general ICB functions and determines if they are 
operating correctly. The checks are useful when first installing the 
cards, because the card automatically starts the self-test when 
inserted. The self-test provides an immediate indication of the card’s 
operating status by performing a detailed test and analysis of the 
installed hardware. The test determines the integrity of the hardware 
and establishes the connection of the ICB card.

The Power Up Self-test is executed through the maintenance port. If 
any fault has been detected, an error message is stored in the system 
log file and is printed on the maintenance port. 

Table 40 describes the items the system checks during the ICB 
self-test.

Signaling tests check the x12 interfaces in both directions between the 
card and system. This test includes reception of the messages from the 
system and sending messages to the system. The Signaling test is 
executed from Overlay 30 using the UNTT command (Meridian 1/CS 

 

Processor/Co-processor

Reads and stores processor ID. Runs processor self-test.

SDRAM

Checks the amount of SDRAM installed. Performs read/write test.

System I/O Controller

Performs read/write test on selected registers.

PCMCIA Controller

Performs read/write test on selected registers.

DS-30X Interface

Tests shared memory and performs loopback test over SD-30 LCA.

On-board DSP card

Checks the presence of DSP cards and initiates diagnostic tests on DSP 
cards, if present.

PCMCIA hard drive

Checks the presence of the hard drive and checks the configuration 
information.

PCMCIA Flash card

Checks the presence of Flash memory and checks configuration 
information.

Loopback MPU

Sends data to the transmit area of the MPU buffers and resends it back 
for the receive area to the same buffer.

Loopback DSP

Sends data to the transmit area of the MPU buffers and resends it back 
for the receive area to the same buffer.