User Manual
SUPM1
page 86 of 94© KEYMILE December 2015 EN/LZTBU 372 129/1 RC
94
User Interface Reference
Hazardous voltages. Risk of electric shock!
With an active FRV alarm there is a risk of hazardous voltages! Mains volt-
age of 115VAC or 230VAC is a danger to life.
GLC Ground Leakage Cur-
rent
Equipment
Alarm
Minor In the on-hook state the alarm is acti-
vated if the leakage current from the b-
wire to ground exceeds the current
threshold of 17 mA for 4 seconds. This
corresponds to an impedance of about
3100 Ω.
The alarm is cleared if the leakage cur-
rent falls below 17 mA for 4 seconds.
In the off-hook state the alarm is acti-
vated if the leakage current from the a-
wire or the b-wire to ground exceeds the
current threshold of 17 mA for 4 sec-
onds. This corresponds to an impedance
of about 500 Ω between the a-wire and
ground and about 900 Ω between the b-
wire and ground.
The alarm is cleared if the subscriber
goes on-hook and the leakage current
falls below 17 mA for 4 seconds.
Note: Pressing the Ground Key for more
than 4 seconds creates the “Ground
Leakage Current” alarm, independent if
the Ground Key affects the a-wire or the
b-wire.
LNF Line Fault Equipment
Alarm
Minor This is a summary alarm for all line-test
alarms.
WSC A/B-Wire Short Circuit Equipment
Alarm
Major This alarm is driven by the permanent
line checks and indicates that the a-wire
is shorting to -V
BAT
continuously or that
the b-wire is shorting to ground continu-
ously.
The alarm is activated if the short circuit
persists for 7 seconds.
After removal of the short circuit the
alarm remains active for another 30 sec-
onds.
Note: Pressing the Ground Key for more
than 7 seconds creates the “A/B-Wire
Short Circuit” alarm.
ABSC A-B-Wire Short Circuit Equipment
Alarm
Major This alarm is driven by the permanent
line checks and indicates the presence
of a short circuit between the a-wire and
the b-wire, i.e. the differential voltage is
<5V.
FRV Foreign Voltage Equipment
Alarm
Major This alarm is driven by the permanent
line checks and indicates the presence
of foreign voltages e.g. from mains on a
subscriber line.
Table 49: AP: / unit-x / port-y, Fault Management (continued)
ID Fault Cause Event Type Traffic
Affecting
Default
Severity
Description
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