[asterisk-users] speech gaps with iax2

[Pavel Jezek]

more info, iax stats:

asterisk*CLI> iax2 show netstats
                                -------- LOCAL ---------------------  
-------- REMOTE --------------------
Channel                    RTT  Jit  Del  Lost   %  Drop  OOO  Kpkts  
Jit  Del  Lost   %  Drop  OOO  Kpkts
IAX2/honzat-14             406  386  609   110   0   326    0     43   
77  132   460   2    27    0     42



and my typical rtt times (imho, not too bad):

 icmp_seq=21 ttl=249 time=489 ms
 icmp_seq=22 ttl=249 time=219 ms
 icmp_seq=23 ttl=249 time=105 ms
 icmp_seq=24 ttl=249 time=267 ms
 icmp_seq=25 ttl=249 time=245 ms
 icmp_seq=26 ttl=249 time=666 ms
 icmp_seq=27 ttl=249 time=379 ms
 icmp_seq=28 ttl=249 time=282 ms
 icmp_seq=29 ttl=249 time=405 ms
 icmp_seq=30 ttl=249 time=742 ms
 icmp_seq=31 ttl=249 time=878 ms
 icmp_seq=32 ttl=249 time=394 ms
 icmp_seq=33 ttl=249 time=446 ms
 icmp_seq=34 ttl=249 time=182 ms
 icmp_seq=35 ttl=249 time=102 ms




Pavel Jezek wrote:
> I'm using iax2 interconnection between two asterisk (1.2.9.1) boxes,
> also using jitterbuffer, because this is over cdma, codec ilbc
> jitterbuffer is working fine, except some gaps in speech....
> I experimented with resyncthreshold, buffer size but no improvement :-(
> is there any way, to force jitterbuffer to stay at some size and not 
> automaticly resize?
> my cdma connection is not so bad quality, rtt 120-1500ms, but no 
> packet loss
> PJ
>
>
> my iax2.conf jiterbuffer part:
> [general]
> jitterbuffer=yes
> forcejitterbuffer=yes
> maxjitterbuffer=3000
> maxjitterinterps=15
> resyncthreshold=-1
>
>