Hi All
It's a little dificult reading this post, but I can say that TSAPI is the newest protocol used by Avaya
1. I cannot believe that there is still customers using MAPD, it's end of life and not been used in the last two years. After mapd cards Avaya started using C-Lan and this should be used if you have any capacity issues.
That said TSAPI is alot cheaper than DLG you unfortunaly require the advanced license NOT the basic. We have done two installs on two seperate corporates and it works well.
One install was done on CM3 and the other on CM5
If some would like more info or battle with something feel free to ask.