Carrier Access Access Navigator user manual 15. DS1 Status LEDs, Set ds1 up command

Alarm Clearing

DS1 Status LEDs

DS1 Status LEDs

Each Quad T1 Framer (QF) card has status indicators for four DS1s. The Access Navigator holds up to 8 QF cards, providing up to 32 DS1 circuits.

There are a total of 32 DS1 status LEDs on the front control panel, arranged in groups of 4, corresponding to the 4 DS1 interfaces of each installed QF card. An LED will be off if the associated DS1 interface is out of service or if there is no installed Quad Framer card for that interface. In order to display the many DS1 status states, each DS1 LED will show a specific color (red, yellow, green) and duty cycle (off, on, flash slow, flash fast).

Table 14-15. DS1 Status LEDs

LED State	Description	Troubleshooting
Off	Off-line	Individual DS1s can be taken out of
		service by using the set ds1 down
		command and put into service using the
		set ds1 up command.
Green	Normal operation	Normal operation.
Green Flashing	Loopback test in progress	Tests may be initiated by local or remote
		commands. Local self-tests are initiated
		using the set ds1 line loopup and set ds1
		payload loopup commands. Remote
		tests use ANSI T1.403 in-band or FDL
		commands.
Red	Loss of signal (LOS)	When the receiving unit detects a failure,
		it will display a red alarm and send a T1
		yellow alarm signal upstream toward the
		cause of the problem (such as a cut
		cable). Normally, the location of the fault
		is somewhere between the units
		displaying the red and yellow alarms.
Red Flashing Fast	Self-test failure	Retest DS1 using test ds1 command. If
		test fails again, replace Quad Framer card
		with known good card and test again.
Red Flashing Slow	Loss of frame (LOF) and/or	T1 problem exists, but the line is intact.
	Alarm indication signal (AIS)	LOF indicates an upstream T1 transmit
		problem exists, or that there is a framing
		mismatch (ESF and D4) at the two ends.
		An AIS (blue alarm) message is
		transmitted downstream to indicate an
		upstream problem exists.

14-20 August 2003 Access Navigator - Release 1.8