Ber; Background Error Measurement - Alcatel-Lucent 9500 MXC User Manual

Commissioning Tests

BER

Background Error Measurement

3DB 23063 ADAA - Rev 004 July 2007
Tests are described for:
• BER
• Background Error Measurement
• Trib BER Measurement
• Fade Margin
• Protection Switching
A BER test is applied to check that the link is passing traffic error free for the test
period; normally a minimum of 8 to 12 hours (overnight).
Two test methods can be employed:
• Background error measurement over radio paths; customer traffic is not
affected. Refer to Background Error Measurement on page 1-3.
• Tributary BER measurement, where customer traffic on a trib is replaced by a
BER test pattern. Refer to Trib BER Measurement on page 1-4.
9500 MXC provides background G.826 error measurements on the radio paths,
from RAC to RAC. Such tests run continuously in the background (in both
directions).
• G.826 data capture is initiated in the CT Performance screen. Refer to
Performance in Volume IV, Chapter 15. A capture period can be started and
stopped from this screen.
• Historical G.826 error events are presented in the CT History screen. Refer to
History, in Volume IV, Chapter 15. Depending on its setting, the history screen
displays error occurrences within 15 minute blocks over seven days, or within
24 hour blocks over one month.
9500 MXC User Manual
Vol. V-1-3