Скрипт просит ненужную скобку

#!/bin/sh
PROVIDER="maks-server-remote"
CALLING="pppd call $PROVIDER"
ISP="192.168.19.1"
ADDRESS=`netstat -rn | grep ppp0 | grep UH | awk -F' ' '{ print $1 }'`
start() 
{
    echo -n "Making connection to ISP: $PROVIDER"; echo "..."
    `$CALLING` }
control() 
{
    echo "Testing connection quality..."
    SUCCESS=`ping -c 5 $ISP | grep received | awk -F, '{ print $2 }' | awk -F' ' '{ print $1 }'` 
    if [ $SUCCESS -eq 5 ]; then 
        echo "Connection to ISP $PROVIDER established."
        echo "Everything is OK!" 
        else 
            echo "No connection to ISP $PROVIDER" 
    fi
}
stop() 
{
echo "Stopping vpn connection to ISP $PROVIDER"
killall /usr/sbin/pptp
}
if [ "$ADDRESS" = "$ISP" ]; then 
    echo "ppp0 set up correctly."
    control
    
elif [ -z "$ADDRESS" ]; then
    echo "No ppp0 connection is available" 
    pptpquan=`ps awx | grep pptp | wc -l`    
    if [ $pptpquan -gt 1 ]; then 
        stop
        sleep 1
     fi
    start  
    sleep 10
    control
else
    echo "ppp0 connection is wrong!"
    stop
    sleep 1
    start
    sleep 10
    control        
fi

  `$CALLING` }

  `$CALLING`
}