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Originally posted by Michael Havens:
don't need proper- not for a customer. Beanies weren't working; lines seemed to be shorting.
This isn't really a case of "proper" versus "non-standard". You simply cannot have a T with twisted pair Ethernet. Every device needs a dedicated cable between it and a device on the other end.

If you are coming out of a DSL modem that does not have a built in router, then you need to buy a router to sit between the DSL modem and every other device. If the DSL modem has a built in router that just doesn't have enough ports, then you need a small switch to provide more ports. One port on the DSL modem/router to the switch, and every other port can be used for networked devices.

Again, every device must plug into it's own port on the router. Sharing is physically impossible. If you splice, you are effectively tying the transmit pairs of two or more devices together, and connecting two outputs is generally a bad idea in any system.