-VPI=$(nvram get atm_vpi)
-VCI=$(nvram get atm_vci)
-USERNAME=$(nvram get ppp_username)
-PASSWORD=$(nvram get ppp_passwd)
-KEEPALIVE=$(nvram get ppp_redialperiod)
-KEEPALIVE=${KEEPALIVE:+lcp-echo-interval 1 lcp-echo-failure $KEEPALIVE}
-DEMAND=$(nvram get ppp_demand)
-case "$DEMAND" in