Has anyone implemented the 8 line tele intercom?

[jpp412]

I'm trying to figure out the microcontroller program.

 

[MP1]

Everyone:
Please! When asking about a project, please add a link in your post. Otherwise we have to leave the forum to go look at it. A link will open in a new window. Most users will not leave the forum to see what you are talking about, so you will most likely get very few replies.

MP

 

[jpp412]

Sorry about that.

Here is the link:
http://www.electronics-lab.com/projects/telephone/017/index.html