ADTRAN 1200070L2, 1200070L1 user manual WAN Indicators, Test Indicators, Pushbutton Tests

	Chapter 1: Understanding ISDN and the Express XL/XLT
WAN Indicators
LNK	Flashes when the link is being negotiated; solid when the link
	is active.
B1	Flashes when a call on the B1 channel is in progress; solid
	when a call is connected.
B2	Flashes when a call on the B2 channel is in progress; solid
	when a call is connected.
Loop	Indicates ISDN layers status. Indicator is off when layer 1 is
	down. A fast flash indicates layer 1 is up and layer 2 is down.
	A slow flash indicates layer 2 is up and layer 3 is down. A sol-
	id illumination indicates all layers are up.
PWR	Flashes when self-test has failed; solid when unit is powered
	on and self-test has passed.
Test Indicators
ERR	Illuminates when self-test or front panel test has failed.
B1/B2	Indicates test selected by front panel buttons.

						Express XL
					TEST
RX	TX	LI	COL JAB	ERR	LNK B1 B2 LOOP	PWR
						SELECT	TEST

Figure 1-6

Express XL/XLT LEDs

Pushbutton Tests

The echo request test can be executed by pressing the SELECT button one time and pressing TEST. A ping test is executed by pressing the SELECT button twice and pressing TEST. The IP address pinged comes from the previously pinged address set in the menu. If it is blank, the default gateway is used. If the default gateway is blank, an error is indicated. The ERR indicator illumi- nates if any pings are not returned. The dial self-test is invoked from the front panel if the SELECT button is pressed three times. The LDN(s) must be al- ready programmed for this test to work.

61200.070L1-1 Express XL/XLT User Manual 17