To appease my curiosity on the use of QoS and VoIP, i would like to buy the necessary equipments for my lab experiment but i don't know what to buy.
I currently have routers 2611XM with CSU/DSU, and four serial interfaces each.
What else do i then need to include to allow me practice with QoS, IntServe, Diffserv, VoIP and all that?.
I have read some books mentioned phones or IP phones, would therefore need any help in shaping my ways to the right purchase of equipments.
Thank you all