RAD Data comm ASMI-450 operation manual Troubleshooting Instructions

Diagnostics

5.5 Troubleshooting Instructions

In case a problem occurs, check the displayed alarm messages and refer to Section 5-2 and Table 5-1 for their interpretation. If trouble cannot be corrected by performing the actions listed in Table 5-1, use Table 5-2: identify the trouble symptoms and perform the actions listed under “Corrective Measures” in the order given in Table 5-2, until the problem is corrected.

Table 5-B. Troubleshooting Chart

No.	Trouble Symptoms		Probable Cause		Corrective Measures
1	The ASMi-450 is “dead”	1.	No power	1. Check that both ends of the power cable are
					properly connected (for AC-powered units,
					also check that the POWER switch is ON).
				2.	If the ASMi-450 is powered from DC, check
					the polarity of the power connections
		2.	Blown fuse	Disconnect the power cable from both ends and
				replace the fuse with another fuse of proper
				rating
		3.	Defective ASMi-450	Replace the ASMi-450
2	Local DTE does not	1.	Problem in local router	Activate the local port loopback. The TD and
	receive the remote DTE.		connections	RD indicators should light to indicate data
	No alarm indicator lights			activity. If the local DTE does not receive its
				own signal, check the connections of the local
				DTE, and the DTE itself
		2.	Defective ASMi-450	Perform power-up self-test and replace the
				ASMi-450 if defective
3	HDSL LOS indicator	1.	External problem	1.	Activate the local user's channel loopback. If
	lights (local loss of				the local DTE does not receive its own
	synchronization alarm on				transmission, check the cable connecting it
	the HDSL line)				to the ASMi-450 DCE connector
		2.	Defective ASMi-450	2.	Perform power-up self-test and replace the
					ASMi-450 if defective
4	Ethernet interface COLL	1.	Loopback connected on	1.	If the TST indicator lights, check and
	indicator lights most of		the ASMi-450		disconnect the loopback
	the time, and LAN			2.	Check and replace if necessary the cable that
	cannot operate				connects the ASMi-450 10BaseT connector
					to the LAN
				3.	Disconnect the ASMi-450 from the LAN: if
					problem persists, troubleshoot the LAN
				4.	Perform power-up self-test and replace the
					ASMi-450 if defective

ASMi-450 Installation and Operation Manual 5-9