Install Skype for Linux 4.5 on CentOS 7

$ wget https://repo.skype.com/latest/skypeforlinux-64-alpha.rpm
$ sudo yum install skypeforlinux-64-alpha.rpm

Reference

https://www.techspot.com/downloads/4985-skype-for-linux.html
https://www.centos.org/forums/viewtopic.php?t=47069