Testing - Nokia DNT2Mi sp/mp Operating Instructions Manual

Alarm Q1 message
source
Port n
Loss of incoming
signal
Blocked from use
Test mode
–
AIS 2M
Loss of frame
alignment
CRC multiframe
alignment lost
End to end frame
loss
Line Loss of frame
alignment
No incoming line
signal
Test mode
Equipment
7.3

Testing

DN01145897
Issue 2-0 en
Table 13. Alarms
Front panel
message
BER > 1E-6 (1E-3)
No incoming
signal
CT140 ON
CT141 ON
Remote test
No adapter
AIS
Framing lost
CRC MFA lost
V.110 frame lost
Far-end alarm
Framing lost
BER > 1E-6 (1E-3)
No line signal
–
Synch. clock fault
DNT2Mi tests can be controlled via the front panel or using Q1 menus.
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Description
Bit error rate worse than the set limit in port 1, 2, or 3
DTE off or not connected to the DTE interface adapter
of port 1, 2, or 3
Timeslot allocation mismatch. The number of timeslots
allocated to the port does not match with the speed
used in the line.
DTE is driving circuit 140 (RL) active in port 1, 2, or 3
DTE is driving circuit 141 (LL) active in port 1, 2, or 3
Remotely controlled digital loop in port 1, 2, or 3
The DTE interface adapter not in place in port 1, 2, or 3
G.704 AIS message in port 1, 2, or 3
G.704 framing lost in port 1, 2, or 3
G.704 multiframe alignment lost in port 1, 2, or 3
V.110 framing lost in port 2 or 3
Bit 3 (A-bit) of the frame not containing the frame
alignment signal
Line frame synchronisation lost (G.704)
Bit error rate worse than the set limit
Line failure or remote equipment is faulty or switched
off
Line in test mode
Failure in synchronisation source, for example line
signal missing when the line timing mode has been
selected.
Maintaining DNT2Mi
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