voice lab setup help

alienkidmj12alienkidmj12 Registered Users Posts: 2 ■□□□□□□□□□
i want to learn some cisco telephony, im thinking of buying

cisco service router 2801

i've seen the following mentioned but not quite sure what they are used for,
vic2-4fxo
vic2-2fxs

also, do i need a switch with poe ? i already have 2 cisco voip phones that i can use.

thanks

dave

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