asterisk users - Jan 2012 - Sporadic one way audio problem

Hi all again,

I've got a problem with sporadic one way audio calls, which means
sometimes I can't hear the calling party (call is established, but audio
is missing). Today I received ~90 calls, one of them got this problem.

I've got two networks involved, without NAT:

- 192.168.1.X, in there one nic of my server and all the phones
- a private net to my provider, in there a nic of my server and the voice
switch of my provider

My sip.conf:
[general]
port=5060
bindaddr=0.0.0.0
language=de
allowguest=no
;echocancel=yes
;echotraining=yes
alwaysauthreject=yes
disallow=all
allow=alaw
deny=0.0.0.0/0.0.0.0
permit=XXX.XXX.X.X/29
permit=192.168.1.0/24
;jbenable=yes
;jbforce=yes
;jbmaxsize=20
;jbresyncthreshold=1000
tos=0x10
directmedia=no
nat=no
directrtpsetup=no

[provider]
type=peer
host=XXX.XXX.X.X
insecure=port,invite
context=XXXXXXXXX
dtmfmode=rfc2833
directmedia=no
nat=no
directrtpsetup=no
;qualify=300

[one-phone]
[10]
type=peer
context=XXXXXXXXX
secret=XXXXXX
host=dynamic
;qualify=300
directmedia=no
nat=no
directrtpsetup=no
dtmfmode=inband

Any help greatly appreciated!

Thanks,
Georg

> deny=0.0.0.0/0.0.0.0
> permit=XXX.XXX.X.X/29
> permit=192.168.1.0/24
Are you sure your provider *always* sends data from this /29?

Maybe you have this in your iptables as well and sometimes audio is
received from outside this /29 and therefore blocked?

-- 
Andreas Sikkema