one question about FXS & FXO card ..
I'm new this field so i came up with this question .. i have 2801 ( with PDVM module installed ) .. what if i don't install fxs and fxo cards in my router ... can i still ESTABLISH the communication between 2 IP Phones in the same subnet .. i'm not calling outside or interested in connecting Analog devices .... i have not tried yet but i think... there shouldn't be any issue .. any thoughts ... ???