[asterisk-users] HDLC errors

[Steven]

I'm running Asterisk 1.2.26.1 svn rev 79171 on Trixbox 2.2.  libpri 
1.2.7 and zaptel 1.2.22.1.  The hardware is a HP dl360 single cpu with a 
TE220B.  The system load is below 0.10.

I moved the server into production, with one PRI, on Friday.  On that 
day we handled a couple thousand calls and I only saw one HDLC abort 
message.  On Saturday half the calls and two abort messages an hour 
apart.  On Sunday, after 1500 when there was only a couple calls, the 
HDLC messages went crazy.

We're getting non-stop Abort messages, with Bad FCS thrown in about 
every tenth message.  They come in bunches, with short 10-30 second 
breaks.  Then every once and awhile there is an 30 minute break, 
sometimes a 3 hour break.  The messages seems completely separate from 
system load.  The system will be idle and get the messages and have no 
messages when I load up dozens of calls on it (using call files to 
complete calls)

After reading the mailing list and various websites (asteriskguru.com 
has a couple articles), the first thing I did was look for IRQ 
conflicts.  The module for the usb bus (no usb devices attached) was on 
the same IRQ.  Disabling USB had no effect.  zttool shows no IRQ misses.

The second PRI was installed on Monday, that day with only two calls, 
the message came 11 times.  Three times on Tuesday with no calls, then 
late at night I loaded it up with calls for testing (having call files 
call out on the second PRI to the first PRI) and no messages were 
generated.  Again today its had a few messages with only a couple calls.

I'm not sure what to try next, other than calling the telco and asking 
them to check their equipment.  Does any one have a suggestion before I 
do that?

Thanks.