Lucent Technologies Release 6 LEDs on Standby Components, TN1654 DS1 Converter Circuit Pack LEDs

DEFINITY Enterprise Communications Server Release 6	Issue 5
Installation and Test for Multi-Carrier Cabinets 555-230-112	May 1998

4Test the System

LED Indicators Page 4-16

Figure Notes
1.	Alarm LED (Red)	4.	STATUS LEDs
2.	Test LED (Green)	5.	SPAN LEDs
3.	Busy LED (Yellow)

Figure 4-2. TN1654 DS1 Converter Circuit Pack LEDs

LEDs on Standby Components

In high and critical reliability systems, duplicated components on standby usually have the yellow LEDs off, with the following exceptions:

■The major, minor and warning alarm LEDs on the SYSAM circuit pack on the standby SPE do not give reliable indications. Note only LEDs on the active SYSAM circuit pack.

■The yellow LED blinks on and off when the standby processor circuit pack is up and standby maintenance is running.

■In high reliability systems with a Center Stage Switch, (duplicated SPE, simplex PNC), the standby Switch Node clock’s yellow LED is off. In critical reliability systems, the standby SNC is located on a separate carrier and normally remains lit.

■Yellow LEDs on power units on standby carriers normally remain lit.