3Com CoreBuilder 9000 User Manual page 206

206 C 8: V
HAPTER IEWING
SONET section level BIP errors (B1):
SONET line level BIP errors (B2):
SONET path level BIP errors (B3):
SONET loss of signal state (LOS):
SONET loss of frame state (LOF):
SONET loss of pointer state (LOP):
SONET out of cell delineation state (OCD):
SONET line alarm indication signal state (Line AIS):
SONET path alarm indication signal state (Path AIS):
SONET line remote defect indication state (Line RDI):
SONET path remote defect indication state (Path RDI):
Table 27 Physical Layer Statistics
Statistic
SONET section level BIP errors (B1)
SONET section level BIP errors (B2)
SONET section level BIP errors (B3)
SONET loss of signal state (LOS)
SONET loss of frame state (LOF)
SONET loss of pointer state (LOP)
SONET out of cell delineation state (OCD)
S
TATISTICS
Example
Enter:
4 1 1 1.1.1
The following information is displayed:
Description
Section BIP-8 - bit-interleaved parity code 8 - even parity for
error monitoring
Line BIP-8 - line error monitoring
Path BIP-8 - path error monitoring
Loss of signal. The loss of signal defect is declared when no
transitions are detected on the incoming signal (before
descrambling). The LOS defect is detected upon observing 2.3
to 100 microseconds of no transitions. The defect is cleared
after a 125 microsecond interval (one frame) during which no
LOS defect is detected.
Loss of frame. A loss of frame defect is declared when an
OOF/SEF defect persists for a period of 3 milliseconds. The
LOF defect is terminated when the incoming signal remains
continuously in-frame for a period of 1 ms to 3 ms.
Loss of pointer. A loss of pointer defect is declared when
either a valid pointer is not detected in eight consecutive
frames, or when eight consecutive frames are detected with
the New Data Flag (NDF) set to "1001" without a valid
concatenation indicator. A LOP defect is terminated when
either a valid pointer with a normal NDF set to "0110", or a
valid concatenation indicator is detected for three contiguous
frames.
0
0
0
ON
OFF
OFF
ON
ON
OFF
OFF
ON