[Unit]
Description=Asterisk PBX and telephony daemon.
After=network.target

[Service]
Type=simple
RemainAfterExit=yes
Environment=HOME=/var/lib/asterisk
WorkingDirectory=/var/lib/asterisk
User=asterisk
Group=asterisk 
PIDFile=/run/asterisk/asterisk.pid
ExecStart=/usr/sbin/asterisk -C /etc/asterisk/asterisk.conf
ExecStop=/usr/sbin/asterisk -rx 'core stop now'
ExecReload=/usr/sbin/asterisk -rx 'core reload'

PrivateTmp=true

[Install]
WantedBy=multi-user.target