Hi, Im new to PBX, and now IP-PBX. I found out about asterisk and need to find see if it is suitable. Firstly I live in Australia (any ACA rules I need to know before purchasing hardware?) Before I purchase hardware, can asterisk do the following, - 3 businesses want me to setup a small call centre to answer there calls. - Each business has a number that needs to be answered with there business name. Can a whisper be played to the operator to say, "Call from Company A" depending on what extension was dialled. (i.e.. Each company would have an extension.) - Can I use Telstra ISDN with a card like AVM Fritz? Is it reliable? I think it is the cheap card. - For the operators is there a compatible USB phone or headset (windows based)?