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Qlink-3000 Multiplexing modem
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Copyright © 2003 -2005 Cronyx Engineering
27
In order to measure error rate separately in “outgoing” and “incoming” directions, it is
recommended to enable BER testers on both devices (in opposite directions).
Example: BER testers are enabled on local and remote devices:
Remote device: BER tester enabled
over full useful bandwidth (link test)
Port 0
(E1)
Port 1
(ET H)
Port 0
(E1)
Port 1
(ET H)
AIS
AIS
Local device: BER tester enabled
over full useful bandwidth (link test)
BERT
BERT
The BER tester may be enabled on one of the port tributaries, in this case the operation
of the second port is not affected. Example: the BER tester is enabled on the port 0
tributary on the local device, loop is enabled on the port 0 tributary on the remote device:
Local device: BER tester on E1 port
tributary (Port 0 tributary test)
R e m o t e d e v i c e :
p o r t 0 tributary l o o p
Port 0
(E1)
Port 1
Port 0
(E1)
Port 1
AIS
BERT