kernel: NO RING on 1/4!

I got this messages in the log:

Nov 20 18:08:23 localhost kernel: RING on 1/3!
Nov 20 18:08:24 localhost kernel: NO RING on 1/3!
Nov 20 18:08:26 localhost kernel: RING on 1/3!
Nov 20 18:08:44 localhost kernel: NO RING on 1/3!
Nov 20 18:17:34 localhost kernel: RING on 1/4!
Nov 20 18:17:35 localhost kernel: NO RING on 1/4!
Nov 20 18:17:37 localhost kernel: RING on 1/4!
Nov 20 18:17:38 localhost kernel: NO RING on 1/4!
Nov 20 18:17:40 localhost kernel: RING on 1/4!
Nov 20 18:17:41 localhost kernel: NO RING on 1/4!


Also I get same messages when I run dmesg:

n 1/4!
RING on 1/4!
NO RING on 1/4!
-- Setting echo registers:
-- Set echo registers successfully


What does it mean, and how to fix it?

CentOS 4.5, Zaptel 1.4.6, A400P

Alisher

hello, Alisher:
I never see that problem before. but i try to help you to diagnose that problem. According to the message, i guess the problem is from Echo.
Rgs!
james.zhu

I think it's not related to echo canceling.

After googling a bit I found these:

bugs.digium.com/print_bug_page.php?bug_id=9096

bugs.digium.com/view.php?id=3874