Specifications

Installation and Operation Manual Chapter 5 Troubleshooting and Diagnostics
ASMi-31 Ver. 3.0 Testing ASMi-31 5-7
Running the BER Testing
ASMi-31 includes an internal BER tester, which tests the line quality and
calculates the bit error rate in the data stream. The ASMi-31 BERT transmits a
pseudo-random 511-bit pattern according to V.52 standard. A pattern evaluator
receives the pattern, compares it to the transmitted pattern and detects errors. If
errors are detected by the pattern evaluator, the ALM LED blinks or remains ON.
You can run BER testing simultaneously on the local and remote ASMi-31
modems, thus checking the integrity of the link from both sides of the application
at the same time (see
Figure 5-6 ).
Pattern
Generator
Pattern
Generator
Line
Interface
Line
Interface
Local ASMi-31 Remote ASMi-31
Pattern
Tester
Pattern
Tester
Figure 5-6. Running Two BER Tests Simultaneously
 To run a BER testing:
• Initiate BER testing via TESTS > BERT > ON (see
Figure 5-7 ).
The display changes to 0.00E-7.
If an error is detected, the ALM LED blinks and the display shows the
bit error rate of the data stream.
TESTS
LOC
BERT *ON
LLB
RLB
REM
LLB+BERT
LOC
RLB+BERT
BERT
LEDS TEST
Figure 5-7. Initiating BER Testing