VOip

im new in WAN setups & a client wants me to setup one for them.

first i would like to know want hardware is require to setup WAN btw 3 towns i.e

town A<..(450km)....>townB<...(400km)...>town c

Now the branch offices have diff. lan plans butall are under w2k server

One branch office has three departs. on a 40km radius but the land under their ownership ( farm land)….scenario for fiber backbone on LAN…but ideas needed on this one too.

plz provide the best solution for the WAN and Voice over ip setup

talk to www.hp.com/procurve site but its taking too long to respond, even www.siemons.com/literature

Pls provide the hardware n software best suited for this setup.

thanx
robert