Common Connectors

Click to enlarge pictures

connectors_rj11-1 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).
 connectors_bt  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).
 connectors_usb-1  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).
 connectors_usb-2  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.
 connectors_rj45-1  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.
 connectors_rj45-2  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”.
 DB9 9 Pin Serial Port

Monitor / Display Connectors & Sockets

Socket Connector

(n.b. VGA is NOT the same as 9 PIN Serial – but looks similar)

DVI-D Single Link
DVI-D Dual Link
DVI-I Single Link