Hiiii
    im try 
     where from get this package
freeswitch-meta-all : Depends: freeswitch-mod-flite (= 1.9.0~628~7f9e6f3-1~xenial+1)
     wget -O - https://files.freeswitch.org/repo/ubuntu-1604/freeswitch-1.6/freeswitch_archive_g0.pub | apt-key add -
 
echo "deb http://files.freeswitch.org/repo/ubuntu-1604/freeswitch-1.6/ xenial main" > /etc/apt/sources.list.d/freeswitch.list
 
# you may want to populate /etc/freeswitch at this point.
# if /etc/freeswitch does not exist, the standard vanilla configuration is deployed
apt-get update && apt-get install -y freeswitch-meta-all