I passed my CCNA and want to learn more about voice. I have several 3640 routers, a 2610XM routers, and a bunch of 2950 switches. What router should I use or get for my CCNA Voice home lab? I already have two 7940 Cisco IP Phones, a VIC-2FXO card and a NM-2V card. Is there any other equipment I should acquire?