[Asterisk-Users] Unpredictables Hangups

[Eric Wieling]

Google: Results 1 - 10 of about 149 from lists.digium.com for  "Unknown 
error 500".

Specifically:

http://lists.digium.com/pipermail/asterisk-users/2004-April/042912.html
http://lists.digium.com/pipermail/asterisk-users/2003-November/028105.html
http://lists.digium.com/pipermail/asterisk-users/2003-November/028105.html
http://lists.digium.com/pipermail/asterisk-users/2004-April/043860.html
http://lists.digium.com/pipermail/asterisk-users/2003-July/016538.html
http://lists.digium.com/pipermail/asterisk-users/2004-June/049410.html
http://lists.digium.com/pipermail/asterisk-users/2004-July/055478.html
http://lists.digium.com/pipermail/asterisk-users/2004-March/040502.html

Usually I require dinner and drinks before this kind of heavy duty 
handholding.  Today I guess I was just feeling sorry for someone that 
can't google, so I figured I'd just give you a freebie.

Stefano Finetti wrote:
> Hello all,
> 
> i'm experiencing a list of unpredictables hangup on SIP phones using a 
> PRI E100P Card.
> 
> All i can see in logs is
> 
> " WARNING[81931]: File chan_zap.c, Line 5402 (zt_pri_error): PRI: Read 
> on 37 failed: Unknown error 500"
> 
> I receive a lot of these errors in asterisk/messages.
> 
> It doesn't seem to be strictly linked to hangups, since i have dozen of 
> these messages per minute and i have completely random hangups on lines.
> 
> Moreover, lines don't fall togheter (eg i don't see channels restart nor 
> all phone calls are hungup in the same moment).
> 
> I'm using stable asterisk 1.0, with correspondant libpri and zaptel, and 
> all phones are Snom 105 SIP Phones. Hangups happen only if i use Zap 
> lines, when i use phones for internal calls all goes fine.
> 
> Hardware is a P4 1.7Ghz with 512Mb of RAM, on a Gygabite Motherboard.
> E100P has it's own IRQ level (not shared and below 15).
> 
> Installation has been done on a RedHat9 system with 2.4 kernel taken 
> from kernel.org (2.4.18).
> 
> I desperately need any kind of possible help, since here my boss is 
> planning to wipe asterisk from our office and return to a traditional PBX.
> 
> I can exclude problems in PRI line from Telco and problems due to the 
> cable (it's a shielded cable made from a telco operator)
> 
> Thanks in advance,