1. “Yes – G.711. Should it matter? ”
If you are looking for a standard /established product based on the market leadership / presence – I am not keen.
I am keen in developing the boards which go in a 19″ rack or a box.
If you need few, sat 5 / 10 boards my costs will get covered.
If I need just a couple of boards, I will put adequate processing power to handle more channels on the available bandwidth to have more life and market potential for my designs.
Say G.711 to G.729 etc.
2. I was trying to know more about the need.
3. Are you a carrier ?