EDM01-02: DAG 4.2S Card User Guide
©2005
16
Version 7: May 2006
Optical light
level problem
The following situation indicates a problem with the optical light levels:
LoS OoF LoF SectionBIP
LineBIP
LineFEBE
PathBIP PathFEBE
RxFrames
RxBytes
0
0
0
3943886 769018395
126206289 7887612
174 472777619 4294901759
1
1
1
8048
1569360
257504
16096
0
0
298988352
1
1
1
8095
1578525
259040
16190
0
0
300750950
1
1
1
8096
1578720
259072
16192
0
0 300780107
1
1
1
8097
1578915
259104
16192
0
0 300810210
1
1
1
8093
1577940
258976
16186
0
0 300659848
Stabilise
configuration
Follow these steps to stabilise the configuration.
Step 1.
Ensure Columns are at Zero
Check that the
LoS
,
OoF
, and
LoF
, being the first three columns, are zero.
Check light levels.
Step 2. Inspect for BIP Errors
Check that no BIP errors occur, otherwise check cabling and light levels.
Step 3
Check CRC Settings
For PoS, ensure scrambling and CRC settings are correct.
Step 4. Check FEBE Errors
FEBE errors indicate that the remote end of the link is detecting errors.
NOTE: This may not affect the capture of data by the DAG card.
4.5 Inspect Links Data and Cells
Description
On Packet-over-SONET (PoS) links it can happen that there is very little
or no data information received. This typically indicates incorrect
scrambling settings.
While a default is provided that matches typical link settings, the actual
configuration varies from network to network.
A remedial action is to vary the scramble and pscramble options and
performing a retry.
