Black Box MWU2000-X21 User Manual
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2.048Mbps Wireless Modem
TECHNICAL: 0118 931 2233
•
Straight 2100Hz tone (0): The most popular method based on transmitting a straight
2100Hz tone.
•
Phase reversed 2100Hz tone (1): A 2100Hz tone with phase reversals for improved
differentiation from voice signals.
•
2100Hz VPA tone (2): A tone in the range 2000-2100Hz.
Fractional T1 Alarm buffer
The possible alarms are:
LOS (Loss Of Signal): Also referred to as all zeros signal, indicates that no signal is received
from the data equipment.
AIS (Alarm Indication Signal): Signal is not received by the data equipment.
RLOS (framer un-synchronized): The modem does not succeed to synchronize with the end
equipment.
Yellow-alarm: Indication from the connected end equipment that it does not succeed to
synchronize with the modem.
Frame-slip: Indicates lack of compatibility between the clocks of the modem and the end
equipment.
Remote-BreezeLINK-Unsync: Indicates a temporary incidence of a very noisy radio channel.
Repeated occurrences indicate either a very noisy radio channel or a
hardware problems (e.g. clocks with excessive jitter) or a problem related to configuration of
clocks.
Too many BPV/CV: Too many Bipolar code violations-indicates selection of Bipolar AMI
line code in the modem when the end equipment uses B8ZS line code.
When an alarm is detected a note appears at the bottom of the display:
Note:An alarm
has been activated
and the message:
ALARM EXISTS
is displayed on the menu
header (see Figure 3-1). In addition, the TEST LED will blink.