The computer is plugged into the phone jack and the telephone is plugged into the computer in daisy-chain fashion. The wires can support one telephone and about a dozen computers. Speeds range up to 1 Mbps. Phone-line networks do not require the use of hubs. Another simple and effective means of networking without new wiring is the wireless network.
Wireless networks come in a variety of combinations of size, range, speed, complexity, and price.
Most wireless networks are limited to about twelve to fifteen computers, but several wireless networks can operate independently in the same physical space, allowing wireless networks to grow to two or more overlapping segments. Wires terminate in a wire center or closet on panels or punch-down blocks that are similar to telephone wiring systems. Active wall jacks are plugged into computers on one end and into a repeater hub or switch on the other end in the wiring closet. When the computer is moved and plugged into a new jack, the wiring closet jumper wires may need to be moved as well to activate the wall jack. The typical office has many wall jacks wired, but only as many activated as needed to save on hub ports.