[asterisk-users] Fw: [asterisk-dev] frequent channel reset problem

[Ming-Ching Tiew]

Sorry to have posted to the wrong maillist. Repost here.

Regards.

--- On Fri, 8/22/08, Ming-Ching Tiew <mctiew at yahoo.com> wrote:

> From: Ming-Ching Tiew <mctiew at yahoo.com>
> Subject: [asterisk-dev] frequent channel reset problem
> To: asterisk-dev at lists.digium.com
> Date: Friday, August 22, 2008, 3:04 PM
> 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 !
> 
>