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Packet over SDH (POS)
Continuity Test
Continuity Test
Description
A continuity check is a simple and effective way of checking for missing packets or
corrupted packets that are dropped. The method used is to transmit a PRBS in the
POS payload part of all the IP packets and check that the PRBS arrives at the
receiving port error free. A lost or corrupted packet will result in a burst of errors at
the OmniBER receiver.
The figure below illustrates a packet stream with a bit pattern running through the
packets and shows that when a packet is lost pattern sync loss occurs. Pattern sync
loss will result in errors which can be measured in the OmniBER.
Setting up the OmniBER to perform a Continuity Test
How To
1 Set the Transmitter and Receiver to the same interface settings by choosing
2 Press the
3 Select a POS payload on the
Transmitter for POS Payloads" page 185
212
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,
OTHER
SETTINGS CONTROL COUPLED
TRANSMIT
key and select
,
.
SDH
.
page, see "Setting up the
MAIN SETTINGS
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