2N NetStar Admin manual - Manual (Page 44)

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Digital interface diagnostic
Line state – the parameter cannot be configured. It only shows the state of the
first interface layer.
Number of SLIPs per minute – shows the count of SLIPs. A SLIP is caused by
different clocks on the PBX and the terminal. This value is updated every 6
seconds and represents a weighted average per minute.
BER per second – the Bit Error Rate shows the count of incorrectly transferred
bits on the interface during transmission. The value is updated every 6 seconds
and represents a weighted average per minute.
Supported terminals