zaptel.conf

span=1,0,0,esf,b8zs
span=2,0,0,esf,b8zs
span=3,1,0,esf,b8zs
clear=1-24  
bchan=25-47,49-71
dchan=48,72    

loadzone = us
#loadzone = us-old
#loadzone=gr
#loadzone=it
#loadzone=fr
#loadzone=de
#loadzone=uk
#loadzone=fi
#loadzone=jp
#loadzone=sp
#loadzone=no
defaultzone=us




zapata.conf

[trunkgroups]
[channels]
switchtype=national
signalling=pri_cpe
group = 1
context = from-eli
channel => 49-71
echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
rxgain=0.0
txgain=0.0

switchtype=national
signalling = pri_net
group = 2
context = from-esi
channel => 25-47