[Asterisk-Users] PRI problem???

[Scott Stingel]

Hi Tim-

Except for maybe eliminating the channel bank as a secondary source of
timing, your conf files look fine.  I notice that you've used "2" as the
build-out (line length) parameter - I take it that your asterisk box is not
right next to the switch.  Anyway, I've never seen build-out make much
difference, but maybe that's an issue.

Although asterisk restarts B channels on a periodic basis, it's not supposed
to do this if there's a call in progress, so there's something wrong.

I noticed a problem recently that was causing D channels to drop under load,
but after reporting this, Mark S fixed this on May 18th, so your more recent
distr should cover it.

Finally, in looking through libpri bugs on the bug list, Mark refers to some
kind of firmware problem on some TE410P's (I think), so you might read
through recent bug reports and see if any match your symptom (read the
closed ones too)

Is there anything remarkable in your /var/log/asterisk/messages log file?

regards

Scott M. Stingel
President,
Emerging Voice Technology, Inc.
Palo Alto California & London England
www.evtmedia.com 


_____________________________________________ 
From: 	asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com]  On Behalf Of Timothy R.
McKee
Sent:	Sunday, May 23, 2004 7:52 PM
To:	asterisk-users at lists.digium.com
Subject:	[Asterisk-Users] PRI problem???

I have just finished installing a new asterisk box at my work.  The box is
quite hefty, dual Zeon 2.8s with SCSI drives and 2Gb of memory.  I have a 4
port Digium T1 card for channel bank and PRI access.

I activated a PRI from a local CLEC (DMS-500 based, National protocol).
This PRI is on slot 2 of the card and is set as the primary timing source.
It is ESF/B8ZS.  

All the software is latest CVS HEAD as of 5/22/04.

My problem lies in random intermittent drops of calls.  The entire PRI seems
to disappear, dropping all current established calls.  I see occasional
printouts on an asterisk management console showing all 23 B channels
resetting with no reason given:



configs:

zaptel.conf
#
# span 1 is for channel bank (24 FXS)
span=1,2,2,esf,b8zs
# span 2 is for NuVox PRI (1-23B, 24D)
span=2,1,2,esf,b8zs
# span 3 is unused
span=3,0,0,esf,b8zs
# span 4 is unused
span=4,0,0,esf,b8zs
#
#


zapata.conf

[channels]
;
; Default language
;
language=en
;
; Default context
;
context=dialnational
;
signalling=fxo_ks
use_callerid=yes
callwaiting=no
restrictcid=no
usecallingpres=yes
callwaitingcallerid=no
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=no
echotraining=yes
relaxdtmf=no
rxgain=0.0
txgain=0.0
callgroup=1
pickupgroup=1
immediate=no
amaflags=billing

<channels 1-24 omitted>

;
; NuVox PRI
context=sdnpri
;
switchtype = national
pridialplan = unknown
signalling = pri_cpe
callerid=asreceived
group = 2
channel => 25-47