RAD Data comm IPmux-16 Manual De Usuario
Chapter 3 Operation
IPmux-16 Installation and Operation Manual
3-40 Configuring IPmux-16
Table 3-3. E1/T1 Alarms and Statistics
Alarm Failure Comments
LOS
Loss of Signal
Sync LED Off.
•
For T1: A second during which 192 contiguous pulse positions have no
pulse of either positive or negative polarity (signal is more than 30 dB
below nominal amplitude.
pulse of either positive or negative polarity (signal is more than 30 dB
below nominal amplitude.
•
For E1: A second during which 255 contiguous pulse positions have no
pulse of either positive or negative polarity.
pulse of either positive or negative polarity.
LOF
Loss of Frame Sync LED off.
•
For E1/T1: A second during which an OOF (see below) error persists for
2.5 seconds and no AIS error (see below) is detected.
2.5 seconds and no AIS error (see below) is detected.
LCV Line
Code
Violation
•
Line Code Violation
For T1: A second during which BPV (Bipolar Violation) or EXZ errors have
occurred.
For T1: A second during which BPV (Bipolar Violation) or EXZ errors have
occurred.
•
For E1: A second during which two consecutive BPVs of the same
polarity are received.
polarity are received.
•
BPV is the occurrence of a pulse with the same polarity as the previous
pulse.
pulse.
•
EXZ is the occurrence of a zero string greater than 15 for AMI or 7 for
B8ZS.
B8ZS.
•
Complies with ITU-TI.431, 0.161, G.775 and G.821 standards.
Rcv RAI
(Yellow
Alarm)
(Yellow
Alarm)
Remote
Alarm
Indication
Alarm
Indication
The Sync LED flashes.
•
For E1/T1, a second during which an RAI pattern is received from the far
end when the far-end framer enters a RED state (Loss of Frame).
end when the far-end framer enters a RED state (Loss of Frame).
AIS Alarm
Indication
Signal–
Received
from User
Signal–
Received
from User
The Sync LED is off.
•
For T1: A second during which an unframed “all 1” signal is received for
3 milliseconds.
3 milliseconds.
•
For E1: A second during which a string of 512 bits contains fewer than
three zero (0) bits.
three zero (0) bits.