Endace Measurement Systems.
http://www.endace.com
EDM01.05-10r1 DAG 4.3S Card User Manual
20
Revision 6. 22 September 2005.
4.4 DAG 4.3S Card Configuration Options
, continued
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 REI Errors
REI errors indicate that the remote end of the link is detecting errors.
NOTE: This may affect the capture of data by the DAG card.
4.5 Inspect Link Data
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 then
retry.
If it is necessary to connect the transmit port of the DAG 4.3S to other
equipment, it is necessary to enable the transmit laser. The laser normally
used is eye safe, but is disabled as a precaution as it is not normally
needed.
The laser radiation is in the invisible infrared part of the spectrum. When
the laser is turned on, the bright red laser warning LED will be lit.
In a test-bench situation where two DAG cards are connected directly to
each other, one card must be designated the SONET clock master, and the
other card should be the SONET clock slave, deriving its clock signals
from the received network stream.
