Unfortunately, I can’t find the file ./configure file (step 4) in the asterisk folder. I noticed, however, the file is actually located in a subfolder [,/editline/configure].
I tried running such a file but all make calls fail afterward with the message:
[make: *** No targets specified and no makefile found.]
Something maybe possibly exists somewhere? I have no idea, you’re asking in regards to a version of Asterisk from years upon years upon years ago. That knowledge is out of my brain. May not even build on that version of CentOS, either.
You should re-extract then follow the instructions in README.
You may find you need device drivers. I think it reasonable to assume that the supported ones won’t work on CentOS 6. You may find it doesn’t work well, even for VoIP, without the zaptel driver.