debug  
#logfile /var/log/pppd.log  
lock  
/dev/ttyACM1
460800
nocrtscts
modem
#noauth
nodetach
usepeerdns
debug
noipdefault
defaultroute
user any
#0.0.0.0:0.0.0.0
ipcp-accept-local
ipcp-accept-remote
persist
connect '/sbin/chat -v -t3 -f /etc/ppp/chat/td-connect-chat'  
disconnect '/sbin/chat -s -v -f /etc/ppp/chat/disconnect-chat' 