[asterisk-users] Description of Zaptel/DAHDI E1 alarms

[Jerry Jones]

>
> In dahdi_tool, there are three more indicators of error:
> IRQ misses
> Bipolar violation
> CRC error
>
> As I understand it now, these should be error counters and they  
> provide
> additional information in case of RED alarm state.

Actually you need not be in RED alarm to have these. Just know that  
any quantity is bad. Some (BPV/CRC) occur when line is connected but  
should stabilize and disappear immediately else there is a problem if  
they keep counting.