Operation Manual

page 9
4. Bit Error Rate Testing (BERT)
– BERT in Self Call
To perform a BERT (bit error rate test) enter the
single test menu and choose BERT start. Use the
cursor keys and select the own number in order to
perform a self call. As with a regular phone call,
after confirming the type of service (ISDN
Telephony) and B channel (*), any channel), the
BERT will be started.
By default, the time for testing is 1 min and the bit
pattern is 2^11. The number of LOS (loss of
synchronization) and errors is displayed as well.
Errors can also be inserted manually by pressing
the ERROR soft key.
Having finished the test, the results are displayed.
insert error
pressing
key (9)
detailed
test results
selection
of service
selection
of B channel