I am looking for guidance on combining multiple GIGe Public internet feeds(2 sets of redundant feeds, fibre and or copper)with private SIP trunks to be routed to a single network through a SIP aware firewall. I am looking at upto 14000 similatenous G711 calls being delivered from the above mentioned sources to a SIP Proxy and my app servers. My question is, which products will i require to handle this load? A layer 2/3 switch to consolidate the networks and then an ASA for the firewall? As you can probably see i am a newbie to this area (Telco Guy), any help would be greatly appreciated. Cheers.