This is basically identical on every server, except I have newjb turned off at the moment because of 'metalic audio' complains:
jitterbuffer=no
forcejitterbuffer=no
;dropcount=2
maxjitterbuffer=500
;maxexcessbuffer=80
;minexcessbuffer=10
;jittershrinkrate=1

trunktimestamps=yes
trunkfreq=40                    ; How frequently to send trunk msgs (in ms)

[for each server name]
disallow=all
allow=g726
 ------- {clip}
notransfer=yes
trunk=yes