E link
Local
Converter
Remote
Converter
A link
A link
Ethernet
Ethernet
B link
B link
C link
C link
D link
D link
Error tester
Error tester
Error tester
Remote Loop-back Testing
Local loop-back:
Local loop-back testing makes both local E1 and Ethernet signal loop-back
outward, this function is designed for testing equipment interface. Connecting E1
误
码仪
is for testing E1 interface; Sniffer is for diagnosing Ethernet interface. Note,
Ethernet data also loop-back during local loop-back, it easy to make broadcast storm
which occurred in Ethernet switches connected with local equipment. In case to avoid
broadcast storm, disconnect with switch before loop-back.
Local Loop-back Testing
Sniffer
D port
C port
B port
E1
误码仪
A port
E1 link
Bit error ratio threshold
When it enable and error bit ratio exceeded more than 10
-6 ,
indicator is yellow
and shut down the service. Traffic is provided by other E1 channels, until that E1
channel is available.
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