I am currently trying to set up a home lab for my CVOICE exam. I am wondering whether it is possible to simulate PSTN by connecting routers FX0<->FXS ports as per the diagram. I will be purchasing E1 cards in several weeks but for now I am trying to get PSTN emulation using what I have got. Also ..do I need to have FXO ports on the 'PSTN emulator' device as well or having FXS connected to the edges router's FXO will be fine?
Your help is much appreciated !!!