Were helping one of our subsidiary to migrate from the frame-relay to MPLS-IPVPN, the integration part for network is almost done. But since the bandwidth allocated is quite substantial, they came out the idea of VOIP using the same IP-VPN link.
Since the CE equipment is fairly simple, a 2611XM. What other things Ill required in order to POC that the VOIP can use the current IP-VPN link as well? Now the subsidiary (HQ nor branches) has nothing related to VOIP. Whats the cheapest way to POC the VOIP thing? We just need to show them the call can be made over the IP-VPN link. Nothing more nothing less.
List of Equipments (In my mind)
i. Few IP phones (depends of the POC sites)
ii. Switches (for IP phone connection and Voice Gateway Connection)
iii. A VOIP server located at HQ (can the router act as a VOIP server as well)?