Curt Shaffer wrote:
I am experiencing a situation where I am getting intermittent choppy
audio. Here is the network layout:
Termination provider -> IAX2 over the Internet -> 20Mb fiber
connection -> router -> Asterisk
My ATA connection goes into the router between the fiber and the
Asterisk server on another interface here is the layout from me to
Asterisk:
Sipura ATA (SPA1001 running 3.1.19(SE) firmware), also tested with
X-lite softest -> PIX 506 (although I have tried multiple routers and
direct connection to the radio try to fix the problem) -> 1 mile
802.11b link to AP -> 15 mile 802.11b link Backhaul -> router -> Asterisk
My Asterisk version is Asterisk 1.2.12.1, Zaptel 1.2.9.1. Ping times
are ~10ms, jitter is under 10 with an average of 5. QoS is enabled in
the router for SIP, RTP and IAX2 traffic going to and from the
Asterisk box.
When I experience the choppiness the ATA reports packet loss on the
web interface (Call 1 Packets Lost: ). I can run something such as
ping plotter from the same leg of the network that the Asterisk box is
on while this is happening and there is not even a small glitch of
lost packets on the network but the ATA displays otherwise. The only
thing I have come up with thus far is possible retransmissions on the
wireless connection (and due to the type of gear, I’m not able to see
this data). We are way out in the country with no other real providers
even close so I’m doubting interference although I suppose it is a
possibility keeping an open mind. My question is can anyone point me
to any possible reasons this would be happening? Also can anyone tell
me other reasons other than real lost packets that the ATA would show
this? My only guess on that was packets that never got an ACK due to
server congestion or some other reason other than actual loss.
The most likely culprit is jitter.
Any insight appreciated!
Thanks
Curt
------------------------------------------------------------------------
_______________________________________________
--Bandwidth and Colocation provided by Easynews.com --
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users
_______________________________________________
--Bandwidth and Colocation provided by Easynews.com --
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users
