Need recommendations on how best to implement quality voice over Frame/ATM. Do separate data PVC and voice PVC make sense?

Currently remote 9371 (PU5 old IBM mini-mainframe) traffic is encapsulated via STUN which is then de-encapsulated at the data center STUN router and traffic is then forwarded to the 3745 FEP. The 3745 FEP will be eliminated next year and would like t...

Can we use Call Manager express and Unity Express on a 3640 that supports FXS phones for voice mail?