Nortel Networks DCT1900 manual LEDs on CPU

Technical Product Manual - DCT1900

Maintenance, Fault Signalling

3.7.2 LEDs on CPU

The CPU is the only board having six LEDs. LEDs 1 to 4 are identical to the LEDs on other boards. LED 5 and 6 are found below the reset button.

LED 5

LED 5 on the CPU board is the "message–received–LED." When a message is written in one of the info, fault, or service tables, LED 5 is turned on. The LED is cleared immediately after reading the appropriate error table as it assumes that the reader then takes notice of the message.

LED 6

LED 6 on the CPU is the "T&M–active–LED." This LED turns on when the test and maintenance module is activated. This is the case when tests are executed, error messages are received or the error handling procedure is running, see Chapter 2, Paragraph 2.2. As soon as T&M is ready the LED is off. Because T&M does not run continuously, the LED often blinks.

3-6	Maint-DCT1900/R8/mw
	© 2000-2005