[asterisk-users] Re: ZapHFC & quadBRI D-Channel going down randomly

[Henrik Woffinden]

I have the exact same problem on a normal ISDN2 BRI line.
I solved it by having my Telco put layer 1 to permanent.

Best regards,

Henrik Woffinden

Alberto Pastore wrote:
> asterisk ha scritto:
>> On most traditional pabx's it's possible to set layer 1 to permanent or
>> call. It sounds like your system is configured for permanent and your
>> lines
>> to call. How you would set this on asterisk I have no idea.
>>
>> fadge
>>
>>   
> The question is: is it possible I am the only one with such
> problems on all asterisk boxes on different sites and
> different ISDN lines? I've googled around on many forums
> but no one seems to have this one.
>
> The old replaced PBXs had layer 1 set for call, as you say,
> and they showed no problems at all.
>
> With asterisk as a PBX, every 2-3 hours, you cannot dial out
> for 5 to 15 minutes then everything gets back to normal
> (no idea about what triggers the return to working state).
>> -----Original Message-----
>> From: asterisk-users-bounces at lists.digium.com
>> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Alberto
>> Pastore
>> Sent: 16 October 2006 17:26
>> To: asterisk-users at lists.digium.com
>> Subject: [asterisk-users] ZapHFC & quadBRI D-Channel going down randomly
>>
>> Hi.
>>
>> I'm running some asterisk boxes on different sites,
>> some equipped with a couple of ZapHFC cards, others with
>> Junghanns quadBRI cards.
>>
>> All boxes were compiled with Asterisk 1.2.10 (libpri 1.2.3 zaptel 1.2.6)
>> and bristuff 0.3.0 pre 1s, distribution is Fedora Core 4 with
>> kernel 2.6.17.3
>>
>> The cards are connected to Telecom Italia's NT1/NT1+ S/T lines;
>> some of them are point-to-point, others are point-to-multipoint.
>>
>> I keep getting always the same problem: after some hours of regular
>> working, some boxes report the usual message
>>
>>
>>     Primary D-Channel on span <n> down
>>
>>
>> (where <n> is different every time, depending on the number of
>> active bri spans)
>>
>> I've read on previous postings that having layer 1 down on ptmp
>> spans is normal.
>>
>> However after getting a down message (on ptp spans too!) I'm no
>> more able to place outgoing calls on that span, until
>> I restart asterisk & zaptel drivers.
>>
>> Sometimes, they get back working by themselves (with the related
>> "span up" notification) after a random time period.
>>
>> During the "down" period, incoming calls are regularly served.
>> However these calls do not change the status of the span, i.e.
>> as soon as the calls are hung up, the span gets down again.
>>
>> I've tried to capture the dialog between the card and NT1 equipment,
>> and during the "down" state, I got this repeated over and over:
>>
>>
>> Sending Set Asynchronous Balanced Mode Extended
>>   [ 00 8b 7f ]
>> Unnumbered frame:
>> SAPI: 00  C/R: 0 EA: 0
>>   TEI: 069        EA: 1
>>    M3: 3   P/F: 1 M2: 3 11: 3  [ SABME (set asynchronous balanced
>> mode extended) ]
>>    == Primary D-Channel on span 1 down
>>
>>
>> In zapata.conf I'm pretty sure I've always set the correct signalling
>> settings
>> (switchtype = euroisdn, signalling = bri_cpe_ptmp or bri_cpe
>> depending on the case)
>>
>> In /etc/zaptel.conf, I've tried many combinations with no difference;
>> my current
>> settings are like this:
>>
>> span=1,1,0,ccs,ami
>> bchan=1-2
>> dchan=3
>>
>> span=2,1,0,ccs,ami
>> bchan=4-5
>> dchan=6
>>
>> etc....
>>
>>
>> Any clue?
>>
>> Thanks,
>> Alberto
>>
>> -- 
>> Alberto Pastore
>> B-Press Srl - Gruppo MSoft
>> P.IVA 01697420030
>> P.le Lombardia, 4 - 28100 Novara - Italy
>> Tel. 0321-499508 Fax 0321-492974
>> http://www.msoft.it
>>
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