Page 712 of 906 NTAK09 1.5 Mb DTI/PRI card553-3001-211 Standard 3.00 August 2005NTAK09 DTI/PRI power on self-testWhen power is applied to the NTAK09 DTI/PRI circuit card, the cardperforms a self-test. The LEDs directly associated with the NTAK09 circuitcard are DIS, ACT, RED, YEL, and LBK. The clock controller LED is alsoincluded in the power on self-test. Table 230 provides the state of theNTAK09 LEDs during the self-test procedure.NTAK20 power on self-testThe clock controller daughterboard LED is the second LED from the bottomon the faceplate of the NTAK09 DTI/PRI card.When power is applied to the NTAK20 clock controller, the LED is initiallyoff for two seconds. If the self-test passes, the LED turns red and flashes onand off twice.When the self-test is completed, the LED remains red until the clockcontroller is enabled. When enabled, the clock controller LED either turnsgreen or flashes green.Table 230NTAK09 LED states during self-testAction LED StatePower up system Top five LEDs light for eleven secondsSelf-test in progress Top five LEDs go out for one secondIf the self-test passes, the top five LEDs flashon and off three times.If the self-test detects a partial failure, the topfive LEDs flash on and off five timesWhen the self-test is completed, the LEDs areset to their appropriate states
