I have a general question about t1 installation. I know a t1 uses 24 analog phone lines for data and voice and depending on the type, it uses them differently. Assuming its a pri t1 with 23 available lines and 1 being used as a control line, how it is wired? A cable goes into a csu/dsu wan port in a router? Then from the router to a firewall or a switch? Does the router need more than 1 wan port? Thanks