User guide

DS3 Test
Multi Protocol Test Set 247
Facility Results
³ Alarms - CNT, or SEC: indicates the alarm types and allows the
selection of the count (CNT) or the total number of seconds in which
one or more alarm occurred (SEC).
LOS (Loss Of Signal): Indicates loss of network signal or connection on
a networking device. If LOS is encountered, it is an indication that the
cable connected to the network device is bad, has no connection on
the other end, network is improperly configured, or the network device
itself is bad.
OOF (Out Of Frame): Indicates that four consecutive frame bit errors
are detected.
AIS (Alarm Indication Signal): Occurs when an AIS signal (all 1s) is
detected at the input, and still exists after the LOF alarm is declared
active (caused by the unframed nature of the all 1s signal). The AIS
alarm is cleared when the LOF alarm is cleared.
X-Bit: Indicates RAI sent by far end device.
IDLE: Indicates 110 with C-Bit =0, X-Bit=1.
UAS (Unavailable Seconds): Indicates seconds of SES after
10 consecutive seconds of SES.