Nokia DNT2Mi sp/mp user manual Testing, Alarm, Q1 message, Front panel, Description, source

Maintaining DNT2Mi

	Table 13.	Alarms
Alarm	Q1 message	Front panel	Description
source		message
Port n	BER > 1E-6 (1E-3)		Bit error rate worse than the set limit in port 1, 2, or 3
	Loss of incoming	No incoming	DTE off or not connected to the DTE interface adapter
	signal	signal	of port 1, 2, or 3
	Blocked from use		Timeslot allocation mismatch. The number of timeslots
			allocated to the port does not match with the speed
			used in the line.
	Test mode	CT140 ON	DTE is driving circuit 140 (RL) active in port 1, 2, or 3
		CT141 ON	DTE is driving circuit 141 (LL) active in port 1, 2, or 3
		Remote test	Remotely controlled digital loop in port 1, 2, or 3
	–	No adapter	The DTE interface adapter not in place in port 1, 2, or 3
	AIS 2M	AIS	G.704 AIS message in port 1, 2, or 3
	Loss of frame	Framing lost	G.704 framing lost in port 1, 2, or 3
	alignment
	CRC multiframe	CRC MFA lost	G.704 multiframe alignment lost in port 1, 2, or 3
	alignment lost
	End to end frame	V.110 frame lost	V.110 framing lost in port 2 or 3
	loss
	Far-end alarm		Bit 3 (A-bit) of the frame not containing the frame
			alignment signal
Line	Loss of frame	Framing lost	Line frame synchronisation lost (G.704)
	alignment
	BER > 1E-6 (1E-3)		Bit error rate worse than the set limit
	No incoming line	No line signal	Line failure or remote equipment is faulty or switched
	signal		off
	Test mode	–	Line in test mode
Equipment	Synch. clock fault		Failure in synchronisation source, for example line
			signal missing when the line timing mode has been
			selected.

7.3 Testing

DNT2Mi tests can be controlled via the front panel or using Q1 menus.

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