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Paul Yates Electrical

ADSL, USB Connector Types & Wiring

	RJ-11 Broadband/Telephone Plug The US style RJ-11 plug is a 4 pin version of the RJ-45 pictured below. It is the smallest in size and is used in the UK for DSL/Broadband Internet connections (RJ-11 to RJ-11).
	British (Telecom) Plug The familiar British telephone plug used in over 30 countries around the world. Any analogue device that operates over a telephone line will be connected using this plug. You'll often find an RJ-11 plug on one end, and a BT plug on the other (RJ-11 to BT).
	USB Type A (Computer) Universal Serial Bus (USB) is the most popular way of connecting peripherals to your computer. To connect most devices, you'll require a type A to B cable (often supplied with the product).
	USB Type B (Peripherals) The other end of the USB wire features a square shape plug designed to connect to peripherals such as your USB DSL modem or router.
	RJ-45 Ethernet Network (Crimped Plug) The RJ-45 connector, featuring 8 pins, is the big brother of the RJ-11. It's used for data communications, specifically Local Area Networks (LANs). Cables can be either straight (for normal use between a hub and a computer) or crossed (for use between two hubs or switches). Each computer requires a Network Interface Card (NIC) to connect to the network.
	RJ-45 Ethernet Network (Moulded Plug) The moulded RJ-45 plug shown to the left performs exactly the same purpose as the crimped version above. Professionally constructed cables are usually moulded by a machine instead of crimped using a special device called a "crimping tool".

Wiring Diagrams

USB DSL Modem

The easiest, and most popular way to get a single computer online with is via a USB modem. The process involves connecting the USB modem to the DSL side of your micro-filter, and your computer to the USB modem using a standard type A to B USB cable. Software installation procedure will vary depending upon the equipment purchased.

Many users choose to share their USB Broadband connection using software such as Microsoft Internet Connection Sharing (ICS). In this scenario, the computer will act as a gateway for other computers to access the Internet via a Local Area Network (LAN).

The same concept can be extended to wireless network cards instead of the more restrictive fixed approach above. This configuration is often referred to as "ad-hoc networking mode" with the sharing computer operating in "infrastructure mode". Most users will find that sharing their USB connection over a wired network is adequate.

Ethernet Router & Local Area Network

The following diagrams show sample configurations for Internet access via an Ethernet router/modem. Many routers feature a 2, 4 or 8 port inbuilt Ethernet hub or switch (a device used to connect computers together). In this scenario, computers can be connected directly to the router. Each computer is wired using a standard Ethernet cable with one end connected to a spare port on the inbuilt hub/switch and the other end connected to the computers network card.

If your Ethernet router only has 1 network port, or you want to connect more devices to the network than there are available ports, a Ethernet switch can be used in combination with a cross-over cable to extend the size of your network.

Additional Telephone Sockets

A micro-filter must be connected to every telephone socket in use at your premises (on the same phone line). The micro-filter is designed to prevent your analogue devices from interfering with the Broadband frequency ranges used by your modem/router.

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