I'm choking on the expense of what a PBX or VoIP PBX system is going to cost me on a monthly basis. I don't really need the bells and whistles. I just need to expand from 4 lines to 6 lines and increase the number of phones that can be connected past my current number, which is 8 handsets/phones plus a base for 17 people. I'm looking for a plain 6-line phone system that is expandable to more than 8 phones/cordless handsets that doesn't require a PBX system and can just work with my Verizon centrex package. Does the elusive 6-line phone exist?