Summary:ASTERISK-11149: On high call volumne chan_zap is not working properly
Reporter:ss7pro (ss7pro)Labels:
Date Opened:2008-01-04 06:22:32.000-0600Date Closed:2011-06-07 14:07:54
Versions:Frequency of
Description:issue related to: 0008507

with the asterisk 1.4.15, libpri 1.4.3 problem still exists.
Comments:By: Jason Parker (jparker) 2008-01-04 10:20:17.000-0600

How is it "not working properly"?

We need some detail here.

By: ss7pro (ss7pro) 2008-01-08 10:23:27.000-0600

Asterisk cannot create new calls:

app_dial.c: Unable to create channel of type 'ZAP' (cause 34 - Circuit/channel congestion)

Configuration is very easy: 30 channels for incoming calls and 30 channels for outgoing calls. When this situation occurs there're free channels on outoging trunk.

By: acid (acid) 2008-01-12 13:12:12.000-0600

I've some basic idea about this problem. I think that there's no enough space on D channel to setup new call. Does anybod know how many new calls per second can fit on single D channel ?

By: dustyc21 (dustyc21) 2008-01-16 16:25:43.000-0600

Same issue here, running 1.4.11 and zaptel 1.4.6
Seeing anywhere from 12 to 50 percent of calls go into Cause 34 status when auto-dialing beyond 12 lines at a time.   I tried putting waits in the dialplan to space out the requests for a channel, thinking that might have some effect, but I never got consistent results from my testing.

By: jmls (jmls) 2008-02-17 12:51:37.000-0600

is this still an issue with the latest 1.4 ?

By: Tilghman Lesher (tilghman) 2008-05-19 15:37:09

Suspending for no response.  Please reopen if you are able to reproduce this in 1.4.19 or later.