Script to Update Zaptel

1. Type the following and save as file name "update-zaptel.sh":
   cd /usr/src
   wget http://ftp.digium.com/pub/zaptel/zaptel-$1.tar.gz
   tar xvzf zaptel-$1.tar.gz
   cd /usr/src/zaptel-$1
   make clean
   ./configure
   make
   make install
   
2. Allow execution right of update-zaptel.sh:
   # chmod +x update-zaptel.sh
   
3. Update Zaptel to 1.4.5.1:
   # ./update-zaptel.sh 1.4.5.1