[asterisk-users] Problems with D-channel (PRI)

[Chris Brentano]

I hope you have a spare card for things like this! :)

If you do, I'd suggest building another Asterisk box (given you also  
have a spare PC for such), copy over the configs, and install the  
spare card. After hours, or whenever it may be appropriate, schedule  
some downtime and test the new system. If the same problem occurs,  
then you can narrow it down to the existing card or system. Then just  
narrow it down further. I'd probably then try the existing card in the  
new system, just to verify whether the card is damaged.

Good luck.
-Chris


On 25 Aug, 2008, at 7:27 AM, Jakub Arkon Syrek wrote:

> We have run pattern loopback test according to
> http://kb.digium.com/entry/138 few times for about 3 minutes each.  
> In one
> test we get 85000 errors and then there where no more errors.
>
> Zttest shows  Average: 99,98% but there also comes values like 98%!!  
> once
> per 10-20 minutes..
>
> Does it mean that our card is crashed? May it be timing error on line?
>
>
> pri debug span 1 shows:
> [Aug 25 16:20:37] WARNING[2713] chan_zap.c: No D-channels  
> available!  Using
> Primary channel 16 as D-channel anyway!
> [Aug 25 16:20:38] VERBOSE[2713] logger.c: Sending Set Asynchronous  
> Balanced
> Mode Extended
> [Aug 25 16:20:38] ERROR[2713] chan_zap.c: !! Got S-frame while link  
> down
> [Aug 25 16:20:38] VERBOSE[2713] logger.c: -- Got UA from network  
> peer  Link
> up.
> [Aug 25 16:20:38] VERBOSE[2713] logger.c: q921.c:782 q921_reset:  
> q921_state
> now is Q921_LINK_CONNECTION_RELEASED
> [Aug 25 16:20:38] VERBOSE[2713] logger.c: q921.c:733 q921_dchannel_up:
> q921_state now is Q921_LINK_CONNECTION_ESTABLISHED
> [Aug 25 16:20:38] VERBOSE[2713] logger.c:   == Primary D-Channel on  
> span 1
> up
> [Aug 25 16:21:07] VERBOSE[2713] logger.c: -- Timeout occured,  
> restarting PRI
> [Aug 25 16:21:07] VERBOSE[2713] logger.c: q921.c:437 t200_expire:  
> q921_state
> now is Q921_LINK_CONNECTION_RELEASED
> [Aug 25 16:21:07] VERBOSE[2713] logger.c: Sending Set Asynchronous  
> Balanced
> Mode Extended
> [Aug 25 16:21:07] VERBOSE[2713] logger.c: q921.c:211 q921_send_sabme:
> q921_state now is Q921_AWAITING_ESTABLISH
> [Aug 25 16:21:07] VERBOSE[2713] logger.c:   == Primary D-Channel on  
> span 1
> down
> [Aug 25 16:21:07] WARNING[2713] chan_zap.c: No D-channels  
> available!  Using
> Primary channel 16 as D-channel anyway!
>
> Regards
> Jakub
>
> ----- Original Message -----
> From: "Rob Hillis" <rob at hillis.dyndns.org>
> To: "Asterisk Users Mailing List - Non-Commercial Discussion"
> <asterisk-users at lists.digium.com>
> Sent: Saturday, August 23, 2008 12:31 PM
> Subject: Re: [asterisk-users] Problems with D-channel (PRI)
>
>
>> Jakub "Arkon" Syrek wrote:
>>>
>>> Hello, we have strange problem, till now everything was working  
>>> fine,
>>> there where no problems with dial and answer calls.
>>> Yesterday our system crashed and we notice strange behavior.
>>
>> What type of event caused the box to crash?  Given the fact that  
>> you've
>> also mentioned a degraded RAID array, this is sounding very much  
>> like a
>> power spike that may have damaged hardware.  What type of card is
>> installed in your machine?  Have you spoken to the relevant support
>> people for that card?
>>
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