Nortel Networks 555-4001-135 ICB self-test sequence, Signaling Tests, Item tested Description

Maintenance 175

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.

Table 40

ICB self-test sequence

Item tested	Description
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.

Signaling Tests

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

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