ADC D3LXC-FCA100, D3LXC-SCA100, DL3XR-FCA100, DL3XR-SCA100 PROTECTION SWITCHING

Front-Panel DescriptionLTPS-UM-8013-03

Table 1. D3LX Front-Panel Description and Status LEDs

Name	Function
LEDs	The LEDs can report the following conditions:
	Activity	Color	Status
STATUS	Off	Not lit	Blown fuse
	On (solid)	Green	Normal operation.
	On (solid)	Yellow	Module initializing or performing self test diagnostics or LED test.
	On (solid)	Red	Module fault detected.
FAR END	Off	Not lit	Remote alarms inactive (no alarm).
	On (solid)	Yellow	Remote alarm on D3LX CO.
DS3 STATUS	Off	Not lit	Unequipped.
	On (solid)	Green	DS3 active.
	On (flashing)	Green	DS3 in loopback, output AIS.
	On (solid)	Red	DS3 fault (LOS).
	On (flashing)	Red	DS3 in loopback, output AIS.
DS3 ONLINE	Off	Not lit	DS3 offline.
	On (solid)	Green	DS3 active.
OPT	Off	Not lit	Optical link active (normal operation).
	On (solid)	Yellow	BER fault.
	On (solid)	Red	Optical link failure (OOF)
APS	Off	Not lit	No protection switching (normal operation).
	On (solid)	Yellow	Force manual protection enabled.
	On (solid)	Red	Protection switching limit.
ENABLE	Pressed with APS		In a protected system, the active DS3 are force switched to that module.
pushbutton			Note: The ENABLE pushbutton is pressed first and released last.
	Pressed with RESET		Cold start reset (service affecting).
			Note: The ENABLE pushbutton is pressed first and released last.
LMPTST/APS	Pressed		Lights front-panel LEDs yellow, except for STATUS and DS3 STATUS which light red.
pushbutton
	Pressed with ENABLE		In a protected system, the active DS3 are force switched to that module.
			Note: The ENABLE pushbutton is pressed first and released last.
RESET	Pressed		Warm start reset (non-service affecting).
pushbutton
	Pressed with ENABLE		Cold start reset (service affecting).
			Note: The ENABLE pushbutton is pressed first and released last.
Retaining latch	Secures the D3LX when it is firmly seated in the backplane of the chassis and the latch is in the upright position

PROTECTION SWITCHING

The D3LX system may be configured for either protected or non-protected mode. For protected mode, two modules are installed: working and protect. The working module carries the signal, while the protect module is in standby. Each working module uses 1 group, physically occupying 2 slots. Each protected module occupies an additional 2 slots; there are four slots required for each D3LX system.

In protected mode, the offline module is switched into service whenever the D3LX determines that a service fault has occurred in the online module.

4 August 30, 2002 D3LX CO and RMT Modules