Paradyne 7924 manual Front Panel LEDs, DSX-1-Compatible Unit, Meaning

Monitoring the Unit

Front Panel LEDs

DSX-1-Compatible Unit

Upon power up, the first three LEDs blink in sequence, indicating a successful start configuration. The green PWR LED lights whenever power is applied to the board. Loop LEDs blink until the loop has been synchronized and then remain off.

T1 HDSL

TERMINALNETWORK

SYSTEM

HDSL

TM

Local Remote Loop Bk

PWR FAIL

AB

Loop Loop

TM

7900

7900

97-15312

LED

Meaning

Local	ON: The local T1 interface has a loss of signal.
Remote	ON: The remote T1 interface has a loss of signal.
Loop Bk	ON: A loopback has been initiated for testing the equipment connected to
	this unit. Refer to Chapter 7, Testing, for more information.
PWR	ON: Power is applied to the unit.
FAIL	ON: The processor has halted and repairs are required.
Loop A	ON: HDSL Loop A has failed.
	Blinking: HDSL Loop A is synchronizing with the far-end unit (such as
	when the units are coming up after a reset). If the LED blinks for more
	than 60 seconds, loss of signal has occurred.
	Off: Loop A is enabled and synchronized.
Loop B	ON: HDSL Loop B has been disabled (only Loop A is in use) or has
	failed.
	Blinking: HDSL Loop B is synchronizing with the far-end unit (such as
	when the units are coming up after a reset). If the LED blinks for more
	than 60 seconds, loss of signal has occurred.
	Off: Loop B is enabled and synchronized.

6-6 October 1997 7924-A2-GB20-30