iax2 lost packets

Hi,

I read some of the other users also posted this issue. I need some help too in understanding my setup.

I have 2 asterisk servers connected over wan using iax2 tunnel mode.
I need to find what the negative value means for LOST. and is there a way to improve the situation. I dont see much jitter though, but see Delay. please suggest.

my iax.conf general section is below:
[general]
bindport=4569
bindaddr=10.10.10.10
iaxcompat=yes
tos=ef
autokill=yes
language=en
jitterbuffer=yes
forcejitterbuffer=yes
maxjitterbuffer=1000
maxjitterinterps=100
resyncthreshold=1000
disallow=all
allow=g729
allow=gsm

                            -------- LOCAL ---------------------  -------- REMOTE --------------------

Channel RTT Jit Del Lost % Drop OOO Kpkts Jit Del Lost % Drop OOO Kpkts
IAX2/cpbx2-4002 211 0 45 154 0 0 57 1 3 71 146 0 12 0 173
IAX2/cpbx2-7526 1000 0 44 -32 2 0 46 0 0 0 0 0 0 0 0
IAX2/cpbx2-8038 210 0 45 -31 0 0 67 0 3 50 0 0 0 0 5
IAX2/cpbx2-11225 210 0 45 -31 0 0 77 0 3 79 0 0 0 0 23
4 active IAX channels

iga-m-pbx*CLI> iax2 show netstats
-------- LOCAL --------------------- -------- REMOTE --------------------
Channel RTT Jit Del Lost % Drop OOO Kpkts Jit Del Lost % Drop OOO Kpkts
IAX2/cpbx2-4002 210 0 45 154 0 0 57 1 4 73 146 0 12 0 175
IAX2/cpbx2-7526 210 0 44 -22 0 0 46 0 1 62 8 0 0 2 0
IAX2/cpbx2-8038 211 0 45 -31 0 0 67 0 4 54 0 0 0 0 7
IAX2/cpbx2-11225 211 0 45 -31 0 0 77 0 3 81 0 0 0 0 24
4 active IAX channels

thanks
ldp