[Freeswitch-users] Need some info

Hi All, I am a new comer to FreeSwitch. The thing is I am planning to setup a call center along with a few of my friends. Hence I was looking around for some IP PBX and so stumbled upon FreeSwitch. This call center would be a 10 to 20 person setup. Here are a few of the questions that I have? 1. Can I have just on PSTN line and configure multiple extensions on FS by using relevent hardware?If not then how many PSTN lines would I require? 2. I did Google for the hardware, it seems I would require some FXO/FXS cards. Am I right? Where can I get them? I am sorry if you find these question too novice or lame. Kindly forgive me. Looking for a positive reply from the community. Regards, Aadil