[asterisk-dev] frequent channel reset problem

[Steve Totaro]

This is an "asterisk-users" question.  Post there and I will answer.

Thanks,
Steve T

On Fri, Aug 22, 2008 at 11:04 AM, Ming-Ching Tiew <mctiew at yahoo.com> wrote:
>
> Hi,
>
> I am stucked with a nasty PRI problem for 2 weeks now and
> will appreciate if I could get some help from here. The
> problem is that my zaptel.conf and zapata.conf have been
> working with one PRI line but it is not working with another
> PRI. I could easily blame it to the PRI line quality
> itself, but the fact is that the PRI line has been working
> fine with at least 2 PBXes for ages without experiencing channel
> reset or call drop problem. However when connected to
> asterisk using wct4xxp driver, it will get call drop randomly
> every now and then.
>
> From the asterisk console output, when calls are dropped,
> there is associated alarm detected.
>
> I would like to know the following:
>
> (1) After detecting an alarm, does the ISDN spec. specifies
>    that all channels must be resetted or this is just an
>    implementation choice which asterisk has made ?
>
>    Should asterisk reset the line after detecting the alarm
>    and caused all calls being drop?
>
> (2) I have a pri monitor ( ISDN tester) that sniffs the PRI
>    line, I found that whenever the dropping calls problem
>    happens,  the monitor print out "RDI Begin ...  SAMBE
>   ,RESTART, RESTART ACK... RDI end".
>
> Does anyone know what is RDI other than what stated in the
> monitor's manual as "Remote Defect Detect" and
> what causes it.
>
> Attached is the  PRI intense debug file.
> ( http://www.geocities.com/mctiew/asterisk/bd2.txt )
>
> Any pointer or help given is greatly appreciated !
>
>
>
>
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