[Asterisk-Users] IAX crackilng

[Patrick Cervicek]

Jordan Novak schrieb:

> I have a cisco VPN from router to router over a Data T-1. The ping times 
> are consistently 32ms with random ping responses of 295ms -408ms about 
> every 30 secs to a minute, I have jitter buffer enabled. The connection 
> goes like this… Mitel SIP phone to Asterisk A, IAX trunked to Asterisk B 
> and then T-1 to a PBX, the calls are internal so they are terminating on 
> Toshiba digital phones. Loud crackling even happens from time to time 
> when a Mitel SIP phone is connected to Asterisk B at that location over 
> thye LAN with no layer three routing, but it is consistent on the IAX 
> trunk. There is a lot of Data traffic, but thus should work regardless, 
> I don’t think the ping times are the issue.

I had exact the same problem
http://groups.google.com/group/comp.dcom.sys.cisco/browse_frm/thread/8cd09069f1aa3288

Solution:
http://groups.google.com/group/comp.dcom.sys.cisco/msg/de9a2fe1aa463bca

Our ACL in our Router was to big. Allow your VPN Tunnel on the top of
your incoming ACL.

Maybe this helps you,
Patrick