Failed: Temporary failure in name resolution

|I want to install zaptel, and I have the following error when I run ‘make install’:
Attempting to download zaptel-fw-oct6114-128-1.05.01.tar.gz
–12:35:22-- … .01.tar.gz
Resolving… failed: Temporary failure in name resolution.
make[1]: *** [zaptel-fw-oct6114-128-1.05.01.tar.gz] Error 1
make[1]: Leaving directory `/usr/src/zaptel-’
make: *** [install-firmware] Error 2

how to solve it?

Try again later. If it still fails, debug your machine’s DNS resolver configuration, e.g. /etc/resolv.conf, named.*, depending on the OS and how it is configured.

It could also be a firewall problem.