What is asteriskathome-1.0.iso?

i will be installing asterisk; before that i understood i need RHEL3 or CentOS and i downloaded asterisk@home1.0 already

in this download page sourceforge.net/project/showfile … _id=123387
i have seen
Download asteriskathome-1.0.iso
Download asteriskathome-1.0-md5sum.txt

please anyone explain

The .iso file is the file you burn to cd in order to install asterisk@home.

The .txt md5 file is used to verify the legitimacy of the .iso you are downloading, in case someone has tampered with it.