My Zap channels having the problems are on a T1 connected to a CAC channelbank, But it looks like the zt_rec in chan_zap error uses the lowlevel zaptel ioctl's which are the same for T1 & PRI...

Scott Stingel wrote:

Hi Michiel-

This may be related to a PRI frame buffer overflow problem that I get in
high-volume IVR applications. I get a lot of these errors mixed in with
frame errors. In my case its load related. Mark and Martin at Digium have
said they'll be looking into improving the buffering mechanism.


-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michiel Betel
Sent: Tuesday, November 25, 2003 1:43 PM
To: [EMAIL PROTECTED]
Subject: [Asterisk-Users] zt_rec: Unknown error 500



I have a number of Zap/ extensions defined in a queue with ringall strategy. When this queue is called sometimes Asterisk seems to think that one of these channels is busy, while it is NOT. The following is shown on the console:
--Called 44
-- Called 36
-- Called 41
-- Called 35
-- Called 38
-- Zap/44-1 is ringing
-- Zap/36-1 is ringing
-- Zap/41-1 is ringing
-- Zap/35-1 is ringing
-- Zap/38-2 is ringing
-- Zap/44-1 is ringing
-- Zap/36-1 is ringing
-- Hungup 'Zap/35-1'
-- Zap/41-1 is ringing
-- Zap/44-1 is ringing
-- Zap/36-1 is ringing
While a
WARNING[165916]: File chan_zap.c, Line 3331 (zt_read): zt_rec: Unknown error 500
is generated in /var/log/asterisk/messages
Any ideas on how to fix this?? Thanks!


Michiel






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